diff --git a/.agents/skills/binlog-failure-analysis/SKILL.md b/.agents/skills/binlog-failure-analysis/SKILL.md new file mode 100644 index 0000000000..7066efc948 --- /dev/null +++ b/.agents/skills/binlog-failure-analysis/SKILL.md @@ -0,0 +1,109 @@ +--- +name: binlog-failure-analysis +description: "Analyze MSBuild binary logs to diagnose build failures by replaying binlogs to searchable text logs. Only activate in MSBuild/.NET build context. USE FOR: build errors that are unclear from console output, diagnosing cascading failures across multi-project builds, tracing MSBuild target execution order, investigating common errors like CS0246 (type not found), MSB4019 (imported project not found), NU1605 (package downgrade), MSB3277 (version conflicts), and ResolveProjectReferences failures. Requires an existing .binlog file. DO NOT USE FOR: generating binlogs (use binlog-generation), build performance analysis (use build-perf-diagnostics), non-MSBuild build systems. INVOKES: dotnet msbuild binlog replay, grep, cat, head, tail for log analysis." +--- + +# Analyzing MSBuild Failures with Binary Logs + +Use MSBuild's built-in **binlog replay** to convert binary logs into searchable text logs, then analyze with standard tools (`grep`, `cat`, `head`, `tail`, `find`). + +## Build Error Investigation (Primary Workflow) + +### Step 1: Replay the binlog to text logs + +Replay produces multiple focused log files in one pass: + +```bash +dotnet msbuild build.binlog -noconlog \ + -fl -flp:v=diag;logfile=full.log;performancesummary \ + -fl1 -flp1:errorsonly;logfile=errors.log \ + -fl2 -flp2:warningsonly;logfile=warnings.log +``` + +> **PowerShell note:** Use `-flp:"v=diag;logfile=full.log;performancesummary"` (quoted semicolons). + +### Step 2: Read the errors + +```bash +cat errors.log +``` + +This gives all errors with file paths, line numbers, error codes, and project context. + +### Step 3: Search for context around specific errors + +```bash +# Find all occurrences of a specific error code with surrounding context +grep -n -B2 -A2 "CS0246" full.log + +# Find which projects failed to compile +grep -i "CoreCompile.*FAILED\|Build FAILED\|error MSB" full.log + +# Find project build order and results +grep "done building project\|Building with" full.log | head -50 +``` + +### Step 4: Detect cascading failures + +Projects that never reached `CoreCompile` failed because a dependency failed, not their own code: + +```bash +# List all projects that ran CoreCompile +grep 'Target "CoreCompile"' full.log | grep -oP 'project "[^"]*"' + +# Compare against projects that had errors to identify cascading failures +grep "project.*FAILED" full.log +``` + +### Step 5: Examine project files for root causes + +```bash +# Read the .csproj of the failing project +cat path/to/Services/Services.csproj + +# Check PackageReference and ProjectReference entries +grep -n "PackageReference\|ProjectReference" path/to/Services/Services.csproj +``` + +**Write your diagnosis as soon as you have enough information.** Do not over-investigate. + +## Additional Workflows + +### Performance Investigation +```bash +# The PerformanceSummary is at the end of full.log +tail -100 full.log # shows target/task timing summary +grep "Target Performance Summary\|Task Performance Summary" -A 50 full.log +``` + +### Dependency/Evaluation Issues +```bash +# Check evaluation properties +grep -i "OutputPath\|IntermediateOutputPath\|TargetFramework" full.log | head -30 +# Check item groups +grep "PackageReference\|ProjectReference" full.log | head -30 +``` + +## Replay reference + +| Command | Purpose | +|---------|---------| +| `dotnet msbuild X.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary` | Full diagnostic log with perf summary | +| `dotnet msbuild X.binlog -noconlog -fl -flp:errorsonly;logfile=errors.log` | Errors only | +| `dotnet msbuild X.binlog -noconlog -fl -flp:warningsonly;logfile=warnings.log` | Warnings only | +| `grep -n "PATTERN" full.log` | Search for patterns in the replayed log | +| `dotnet msbuild -pp:preprocessed.xml Proj.csproj` | Preprocess — inline all imports into one file | + +## Generating a binlog (only if none exists) + +```bash +dotnet build /bl:build.binlog +``` + +## Common error patterns + +1. **CS0246 / "type not found"** → Missing PackageReference — check the .csproj +2. **MSB4019 / "imported project not found"** → SDK install or global.json issue +3. **NU1605 / "package downgrade"** → Version conflict in package graph +4. **MSB3277 / "version conflicts"** → Binding redirect or version alignment issue +5. **Project failed at ResolveProjectReferences** → Cascading failure from a dependency diff --git a/.agents/skills/binlog-generation/SKILL.md b/.agents/skills/binlog-generation/SKILL.md new file mode 100644 index 0000000000..cfa98b02db --- /dev/null +++ b/.agents/skills/binlog-generation/SKILL.md @@ -0,0 +1,93 @@ +--- +name: binlog-generation +description: "Generate MSBuild binary logs (binlogs) for build diagnostics and analysis. Only activate in MSBuild/.NET build context. USE FOR: adding /bl:{} to any dotnet build, test, pack, publish, or restore command to capture a full build execution trace, prerequisite for binlog-failure-analysis and build-perf-diagnostics skills, enabling post-build investigation of errors or performance. Requires MSBuild 17.8+ / .NET 8 SDK+ for {} placeholder; PowerShell needs -bl:{{}}. DO NOT USE FOR: non-MSBuild build systems (npm, Maven, CMake), analyzing an existing binlog (use binlog-failure-analysis instead). INVOKES: shell commands (dotnet build /bl:{})." +--- + +# Generate Binary Logs + +**Pass the `/bl` switch when running any MSBuild-based command.** This is a non-negotiable requirement for all .NET builds. + +## Commands That Require /bl + +You MUST add the `/bl:{}` flag to: +- `dotnet build` +- `dotnet test` +- `dotnet pack` +- `dotnet publish` +- `dotnet restore` +- `msbuild` or `msbuild.exe` +- Any other command that invokes MSBuild + +## Preferred: Use `{}` for Automatic Unique Names + +> **Note:** The `{}` placeholder requires MSBuild 17.8+ / .NET 8 SDK or later. + +The `{}` placeholder in the binlog filename is replaced by MSBuild with a unique identifier, guaranteeing no two builds ever overwrite each other — without needing to track or check existing files. + +```bash +# Every invocation produces a distinct file automatically +dotnet build /bl:{} +dotnet test /bl:{} +dotnet build --configuration Release /bl:{} +``` + +**PowerShell requires escaping the braces:** + +```powershell +# PowerShell: escape { } as {{ }} +dotnet build -bl:{{}} +dotnet test -bl:{{}} +``` + +## Why This Matters + +1. **Unique names prevent overwrites** - You can always go back and analyze previous builds +2. **Failure analysis** - When a build fails, the binlog is already there for immediate analysis +3. **Comparison** - You can compare builds before and after changes +4. **No re-running builds** - You never need to re-run a failed build just to generate a binlog + +## Examples + +```bash +# ✅ CORRECT - {} generates a unique name automatically (bash/cmd) +dotnet build /bl:{} +dotnet test /bl:{} + +# ✅ CORRECT - PowerShell escaping +dotnet build -bl:{{}} +dotnet test -bl:{{}} + +# ❌ WRONG - Missing /bl flag entirely +dotnet build +dotnet test + +# ❌ WRONG - No filename (overwrites the same msbuild.binlog every time) +dotnet build /bl +dotnet build /bl +``` + +## When a Specific Filename Is Required + +If the binlog filename needs to be known upfront (e.g., for CI artifact upload), or if `{}` is not available in the installed MSBuild version, pick a name that won't collide with existing files: + +1. Check for existing `*.binlog` files in the directory +2. Choose a name not already taken (e.g., by incrementing a counter from the highest existing number) + +```bash +# Example: directory contains 3.binlog — use 4.binlog +dotnet build /bl:4.binlog +``` + +## Cleaning the Repository + +When cleaning the repository with `git clean`, **always exclude binlog files** to preserve your build history: + +```bash +# ✅ CORRECT - Exclude binlog files from cleaning +git clean -fdx -e "*.binlog" + +# ❌ WRONG - This deletes binlog files (they're usually in .gitignore) +git clean -fdx +``` + +This is especially important when iterating on build fixes - you need the binlogs to analyze what changed between builds. diff --git a/.agents/skills/build-parallelism/SKILL.md b/.agents/skills/build-parallelism/SKILL.md new file mode 100644 index 0000000000..46373dd2c9 --- /dev/null +++ b/.agents/skills/build-parallelism/SKILL.md @@ -0,0 +1,67 @@ +--- +name: build-parallelism +description: "Guide for optimizing MSBuild build parallelism and multi-project scheduling. Only activate in MSBuild/.NET build context. USE FOR: builds not utilizing all CPU cores, speeding up multi-project solutions, evaluating graph build mode (/graph), build time not improving with -m flag, understanding project dependency topology. Note: /maxcpucount default is 1 (sequential) — always use -m for parallel builds. Covers /maxcpucount, graph build for better scheduling and isolation, BuildInParallel on MSBuild task, reducing unnecessary ProjectReferences, solution filters (.slnf) for building subsets. DO NOT USE FOR: single-project builds, incremental build issues (use incremental-build), compilation slowness within a project (use build-perf-diagnostics), non-MSBuild build systems. INVOKES: dotnet build -m, dotnet build /graph, binlog analysis." +--- + +## MSBuild Parallelism Model + +- `/maxcpucount` (or `-m`): number of worker nodes (processes) +- Default: 1 node (sequential!). Always use `-m` for parallel builds +- Recommended: `-m` without a number = use all logical processors +- Each node builds one project at a time +- Projects are scheduled based on dependency graph + +## Project Dependency Graph + +- MSBuild builds projects in dependency order (topological sort) +- Critical path: longest chain of dependent projects determines minimum build time +- Bottleneck: if project A depends on B, C, D and B takes 60s while C and D take 5s, B is the bottleneck +- Diagnosis: replay binlog to diagnostic log with `performancesummary` and check Project Performance Summary — shows per-project time; grep for `node.*assigned` to check scheduling +- Wide graphs (many independent projects) parallelize well; deep graphs (long chains) don't + +## Graph Build Mode (`/graph`) + +- `dotnet build /graph` or `msbuild /graph` +- What it changes: MSBuild constructs the full project dependency graph BEFORE building +- Benefits: better scheduling, avoids redundant evaluations, enables isolated builds +- Limitations: all projects must use `` (no programmatic MSBuild task references) +- When to use: large solutions with many projects, CI builds +- When NOT to use: projects that dynamically discover references at build time + +## Optimizing Project References + +- Reduce unnecessary `` — each adds to the dependency chain +- Use `` to avoid extra evaluations +- `` for build-order-only dependencies +- Consider if a ProjectReference should be a PackageReference instead (pre-built NuGet) +- Use `solution filters` (`.slnf`) to build subsets of the solution + +## BuildInParallel + +- `` in custom targets +- Without `BuildInParallel="true"`, MSBuild task batches projects sequentially +- Ensure `/maxcpucount` > 1 for this to have effect + +## Multi-threaded MSBuild Tasks + +- Individual tasks can run multi-threaded within a single project build +- Tasks implementing `IMultiThreadableTask` can run on multiple threads +- Tasks must declare thread-safety via `[MSBuildMultiThreadableTask]` + +## Analyzing Parallelism with Binlog + +Step-by-step: + +1. Replay the binlog: `dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary` +2. Check Project Performance Summary at the end of `full.log` +3. Ideal: build time should be much less than sum of project times (parallelism) +4. If build time ≈ sum of project times: too many serial dependencies, or one slow project blocking others +5. `grep 'Target Performance Summary' -A 30 full.log` → find the bottleneck targets +6. Consider splitting large projects or optimizing the critical path + +## CI/CD Parallelism Tips + +- Use `-m` in CI (many CI runners have multiple cores) +- Consider splitting solution into build stages for extreme parallelism +- Use build caching (NuGet lock files, deterministic builds) to avoid rebuilding unchanged projects +- `dotnet build /graph` works well with structured CI pipelines diff --git a/.agents/skills/build-perf-baseline/SKILL.md b/.agents/skills/build-perf-baseline/SKILL.md new file mode 100644 index 0000000000..5331038d0c --- /dev/null +++ b/.agents/skills/build-perf-baseline/SKILL.md @@ -0,0 +1,414 @@ +--- +name: build-perf-baseline +description: "Establish build performance baselines and apply systematic optimization techniques. Only activate in MSBuild/.NET build context. USE FOR: diagnosing slow builds, establishing before/after measurements (cold, warm, no-op scenarios), applying optimization strategies like MSBuild Server, static graph builds, artifacts output, and dependency graph trimming. Start here before diving into build-perf-diagnostics, incremental-build, or build-parallelism. DO NOT USE FOR: non-MSBuild build systems, detailed bottleneck analysis (use build-perf-diagnostics after baselining)." +--- + +# Build Performance Baseline & Optimization + +## Overview + +Before optimizing a build, you need a **baseline**. Without measurements, optimization is guesswork. This skill covers how to establish baselines and apply systematic optimization techniques. + +**Related skills:** +- `build-perf-diagnostics` — binlog-based bottleneck identification +- `incremental-build` — Inputs/Outputs and up-to-date checks +- `build-parallelism` — parallel and graph build tuning +- `eval-performance` — glob and import chain optimization + +--- + +## Step 1: Establish a Performance Baseline + +Measure three scenarios to understand where time is spent: + +### Cold Build (First Build) + +No previous build output exists. Measures the full end-to-end time including restore, compilation, and all targets. + +```bash +# Clean everything first +dotnet clean +# Remove bin/obj to truly start fresh +Get-ChildItem -Recurse -Directory -Include bin,obj | Remove-Item -Recurse -Force +# OR on Linux/macOS: +# find . -type d \( -name bin -o -name obj \) -exec rm -rf {} + + +# Measure cold build +dotnet build /bl:cold-build.binlog -m +``` + +### Warm Build (Incremental Build) + +Build output exists, some files have changed. Measures how well incremental build works. + +```bash +# Build once to populate outputs +dotnet build -m + +# Make a small change (touch one .cs file) +# Then rebuild +dotnet build /bl:warm-build.binlog -m +``` + +### No-Op Build (Nothing Changed) + +Build output exists, nothing has changed. This should be nearly instant. If it's slow, incremental build is broken. + +```bash +# Build once to populate outputs +dotnet build -m + +# Rebuild immediately without changes +dotnet build /bl:noop-build.binlog -m +``` + +### What Good Looks Like + +| Scenario | Expected Behavior | +|----------|------------------| +| Cold build | Full compilation, all targets run. This is your absolute baseline | +| Warm build | Only changed projects recompile. Time proportional to change scope | +| No-op build | < 5 seconds for small repos, < 30 seconds for large repos. All compilation targets should report "Skipping target — all outputs up-to-date" | + +**Red flags:** +- No-op build > 30 seconds → incremental build is broken (see `incremental-build` skill) +- Warm build recompiles everything → project dependency chain forces full rebuild +- Cold build has long restore → NuGet cache issues + +### Recording Baselines + +Record baselines in a structured way before and after optimization: + +``` +| Scenario | Before | After | Improvement | +|-------------|---------|---------|-------------| +| Cold build | 2m 15s | | | +| Warm build | 1m 40s | | | +| No-op build | 45s | | | +``` + +--- + +## Step 2: MSBuild Server (Persistent Build Process) + +The MSBuild server keeps the build process alive between invocations, avoiding JIT compilation and assembly loading overhead on every build. + +### Enabling MSBuild Server + +```bash +# Enabled by default in .NET 8+ but can be forced +dotnet build /p:UseSharedCompilation=true +``` + +The MSBuild server is started automatically and reused across builds. The compiler server (VBCSCompiler / `dotnet build-server`) is separate but complementary. + +### Managing the Build Server + +```bash +# Check if the server is running +dotnet build-server status + +# Shut down all build servers (useful when debugging) +dotnet build-server shutdown +``` + +### When to Restart the Build Server + +Restart after: +- Updating the .NET SDK +- Changing MSBuild tooling (custom tasks, props, targets) +- Debugging build infrastructure issues +- Seeing stale behavior in repeated builds + +```bash +dotnet build-server shutdown +dotnet build +``` + +--- + +## Step 3: Artifacts Output Layout + +The `UseArtifactsOutput` feature (introduced in .NET 8) changes the output directory structure to avoid bin/obj clash issues and enable better caching. + +### Enabling Artifacts Output + +```xml + + + true + +``` + +### Before vs After + +``` +# Traditional layout (before) +src/ + MyLib/ + bin/Debug/net8.0/MyLib.dll + obj/Debug/net8.0/... + MyApp/ + bin/Debug/net8.0/MyApp.dll + +# Artifacts layout (after) +artifacts/ + bin/MyLib/debug/MyLib.dll + bin/MyApp/debug/MyApp.dll + obj/MyLib/debug/... + obj/MyApp/debug/... +``` + +### Benefits + +- **No bin/obj clash**: Each project+configuration gets a unique path automatically +- **Easier to cache**: Single `artifacts/` directory to cache/restore in CI +- **Cleaner .gitignore**: Just ignore `artifacts/` +- **Multi-targeting safe**: Each TFM gets its own subdirectory + +### Customizing + +```xml + + + $(MSBuildThisFileDirectory)output + +``` + +--- + +## Step 4: Deterministic Builds + +Deterministic builds produce byte-for-byte identical output given the same inputs. This is essential for build caching and reproducibility. + +### Enabling Deterministic Builds + +```xml + + + + true + + + true + +``` + +### What Deterministic Affects + +- Removes timestamps from PE headers +- Uses consistent file paths in PDBs +- Produces identical output for identical input + +### Why It Matters for Performance + +- **Build caching**: If outputs are deterministic, you can cache and reuse them across builds and machines +- **CI optimization**: Skip rebuilding unchanged projects by comparing inputs +- **Distributed builds**: Safe to cache compilation results in shared storage + +--- + +## Step 5: Dependency Graph Trimming + +Reducing unnecessary project references shortens the critical path and reduces what gets built. + +### Audit the Dependency Graph + +```bash +# Visualize the dependency graph +dotnet build /bl:graph.binlog + +# In the binlog, check project references and build times +# Look for projects that are referenced but could be trimmed +``` + +### Techniques + +#### Remove Redundant Transitive References + +```xml + + + + + + + + + + +``` + +#### Build-Order-Only References + +When you need a project to build before yours but don't need its assembly output: + +```xml + + +``` + +#### Prevent Transitive Flow + +When a dependency is an internal implementation detail that shouldn't flow to consumers: + +```xml + + +``` + +#### Disable Transitive Project References + +For explicit-only dependency management (extreme measure for very large repos): + +```xml + + true + +``` + +**Caution**: This requires all dependencies to be listed explicitly. Only use in large repos where transitive closure is causing excessive rebuilds. + +--- + +## Step 6: Static Graph Builds (`/graph`) + +Static graph mode evaluates the entire project graph before building, enabling better scheduling and isolation. + +### Enabling Graph Build + +```bash +# Single invocation +dotnet build /graph + +# With binary log for analysis +dotnet build /graph /bl:graph-build.binlog +``` + +### Benefits + +- **Better parallelism**: MSBuild knows the full graph upfront and can schedule optimally +- **Build isolation**: Each project builds in isolation (no cross-project state leakage) +- **Caching potential**: With isolation, individual project results can be cached + +### When to Use + +| Scenario | Recommendation | +|----------|---------------| +| Large multi-project solution (20+ projects) | ✅ Try `/graph` — may see significant parallelism gains | +| Small solution (< 5 projects) | ❌ Overhead of graph evaluation outweighs benefits | +| CI builds | ✅ Graph builds are more predictable and parallelizable | +| Local development | ⚠️ Test both — may or may not help depending on project structure | + +### Troubleshooting Graph Build + +Graph build requires that all `ProjectReference` items are statically determinable (no dynamic references computed in targets). If graph build fails: + +``` +error MSB4260: Project reference "..." could not be resolved with static graph. +``` + +**Fix**: Ensure all `ProjectReference` items are declared in `` outside of targets (not dynamically computed inside `` blocks). + +--- + +## Step 7: Parallel Build Tuning + +### MaxCpuCount + +```bash +# Use all available cores (default in dotnet build) +dotnet build -m + +# Specify explicit core count (useful for CI with shared agents) +dotnet build -m:4 + +# MSBuild.exe syntax +msbuild /m:8 MySolution.sln +``` + +### Identifying Parallelism Bottlenecks + +In a binlog, look for: +- **Long sequential chains**: Projects that must build one after another due to dependencies +- **Uneven load**: Some build nodes idle while others are overloaded +- **Single-project bottleneck**: One large project on the critical path that blocks everything + +Use `grep 'Target Performance Summary' -A 30 full.log` in binlog analysis to see build node utilization. + +### Reducing the Critical Path + +The critical path is the longest chain of dependent projects. To shorten it: + +1. **Break large projects into smaller ones** that can build in parallel +2. **Remove unnecessary ProjectReferences** (see Step 5) +3. **Use `ReferenceOutputAssembly="false"`** for build-order-only dependencies +4. **Move shared code to a base library** that builds first, then parallelize consumers + +--- + +## Step 8: Additional Quick Wins + +### Separate Restore from Build + +```bash +# In CI, restore once then build without restore +dotnet restore +dotnet build --no-restore -m +dotnet test --no-build +``` + +### Skip Unnecessary Targets + +```bash +# Skip building documentation +dotnet build /p:GenerateDocumentationFile=false + +# Skip analyzers during development (not for CI!) +dotnet build /p:RunAnalyzers=false +``` + +### Use Project-Level Filtering + +```bash +# Build only the project you're working on (and its dependencies) +dotnet build src/MyApp/MyApp.csproj + +# Don't build the entire solution if you only need one project +``` + +### Binary Log for All Investigations + +Always start with a binlog: +```bash +dotnet build /bl:perf.binlog -m +``` + +Then use the `build-perf-diagnostics` skill and binlog tools for systematic bottleneck identification. + +--- + +## Optimization Decision Tree + +``` +Is your no-op build slow (> 10s per project)? +├── YES → See `incremental-build` skill (fix Inputs/Outputs) +└── NO + Is your cold build slow? + ├── YES + │ Is restore slow? + │ ├── YES → Optimize NuGet restore (use lock files, configure local cache) + │ └── NO + │ Is compilation slow? + │ ├── YES + │ │ Are analyzers/generators slow? + │ │ ├── YES → See `build-perf-diagnostics` skill + │ │ └── NO → Check parallelism, graph build, critical path (this skill + `build-parallelism`) + │ └── NO → Check custom targets (binlog analysis via `build-perf-diagnostics`) + └── NO + Is your warm build slow? + ├── YES → Projects rebuilding unnecessarily → check `incremental-build` skill + └── NO → Build is healthy! Consider graph build or UseArtifactsOutput for further gains +``` diff --git a/.agents/skills/build-perf-diagnostics/SKILL.md b/.agents/skills/build-perf-diagnostics/SKILL.md new file mode 100644 index 0000000000..07039f8da9 --- /dev/null +++ b/.agents/skills/build-perf-diagnostics/SKILL.md @@ -0,0 +1,144 @@ +--- +name: build-perf-diagnostics +description: "Diagnose MSBuild build performance bottlenecks using binary log analysis. Only activate in MSBuild/.NET build context. USE FOR: identifying why builds are slow by analyzing binlog performance summaries, detecting ResolveAssemblyReference (RAR) taking >5s, Roslyn analyzers consuming >30% of Csc time, single targets dominating >50% of build time, node utilization below 80%, excessive Copy tasks, NuGet restore running every build. Covers timeline analysis, Target/Task Performance Summary interpretation, and 7 common bottleneck categories. Use after build-perf-baseline has established measurements. DO NOT USE FOR: establishing initial baselines (use build-perf-baseline first), fixing incremental build issues (use incremental-build), parallelism tuning (use build-parallelism), non-MSBuild build systems. INVOKES: dotnet msbuild binlog replay with performancesummary, grep for analysis." +--- + +## Performance Analysis Methodology + +1. **Generate a binlog**: `dotnet build /bl:{} -m` +2. **Replay to diagnostic log with performance summary**: + ```bash + dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary + ``` +3. **Read the performance summary** (at the end of `full.log`): + ```bash + grep "Target Performance Summary\|Task Performance Summary" -A 50 full.log + ``` +4. **Find expensive targets and tasks**: The PerformanceSummary section lists all targets/tasks sorted by cumulative time +5. **Check for node utilization**: grep for scheduling and node messages + ```bash + grep -i "node.*assigned\|building with\|scheduler" full.log | head -30 + ``` +6. **Check analyzers**: grep for analyzer timing + ```bash + grep -i "analyzer.*elapsed\|Total analyzer execution time\|CompilerAnalyzerDriver" full.log + ``` + +## Key Metrics and Thresholds + +- **Build duration**: what's "normal" — small project <10s, medium <60s, large <5min +- **Node utilization**: ideal is >80% active time across nodes. Low utilization = serialization bottleneck +- **Single target domination**: if one target is >50% of build time, investigate +- **Analyzer time vs compile time**: analyzers should be <30% of Csc task time. If higher, consider removing expensive analyzers +- **RAR time**: ResolveAssemblyReference >5s is concerning. >15s is pathological + +## Common Bottlenecks + +### 1. ResolveAssemblyReference (RAR) Slowness + +- **Symptoms**: RAR taking >5s per project +- **Root causes**: too many assembly references, network-based reference paths, large assembly search paths +- **Fixes**: reduce reference count, use `false` for RAR-heavy analysis, set `true` for diagnostic +- **Advanced**: `` and `` +- **Key insight**: RAR runs unconditionally even on incremental builds because users may have installed targeting packs or GACed assemblies (see dotnet/msbuild#2015). With .NET Core micro-assemblies, the reference count is often very high. +- **Reduce transitive references**: Set `true` to avoid pulling in the full transitive closure (note: projects may need to add direct references for any types they consume). Use `ReferenceOutputAssembly="false"` on ProjectReferences that are only needed at build time (not API surface). Trim unused PackageReferences. + +### 2. Roslyn Analyzers and Source Generators + +- **Symptoms**: Csc task takes much longer than expected for file count (>2× clean compile time) +- **Diagnosis**: Check the Task Performance Summary in the replayed log for Csc task time; grep for analyzer timing messages; compare Csc duration with and without analyzers (`/p:RunAnalyzers=false`) +- **Fixes**: + - Conditionally disable in dev: `false` + - Per-configuration: `false` + - Code-style only: `true` + - Remove genuinely redundant analyzers from inner loop + - Severity config in .editorconfig for less critical rules +- **Key principle**: Preserve analyzer enforcement in CI. Never just "remove" analyzers — configure them conditionally. +- **GlobalPackageReference**: Analyzers added via `GlobalPackageReference` in `Directory.Packages.props` apply to ALL projects. Consider if test projects need the same analyzer set as production code. +- **EnforceCodeStyleInBuild**: When set to `true` in `Directory.Build.props`, forces code-style analysis on every build. Should be conditional on CI environment (`ContinuousIntegrationBuild`) to avoid slowing dev inner loop. + +### 3. Serialization Bottlenecks (Single-threaded targets) + +- **Symptoms**: Performance summary shows most build time concentrated in a single project; diagnostic log shows idle nodes while one works +- **Common culprits**: targets without proper dependency declaration, single project on critical path +- **Fixes**: split large projects, optimize the critical path project, ensure proper `BuildInParallel` + +### 4. Excessive File I/O (Copy tasks) + +- **Symptoms**: Copy task shows high aggregate time +- **Root causes**: copying thousands of files, copying across network drives, Copy task unintentionally running once per item (per-file) instead of as a single batch (see dotnet/msbuild#12884) +- **Fixes**: use hardlinks (`true`), reduce CopyToOutputDirectory items, use `true` when appropriate, set `true`, consider `--artifacts-path` (.NET 8+) for centralized output layout +- **Dev Drive**: On Windows, switching to a Dev Drive (ReFS with copy-on-write and reduced Defender scans) can significantly reduce file I/O overhead for Copy-heavy builds. Recommend for both dev machines and self-hosted CI agents. + +### 5. Evaluation Overhead + +- **Symptoms**: build starts slow before any compilation +- **Root causes**: complex Directory.Build.props, wildcard globs scanning large directories, NuGetSdkResolver overhead (adds 180-400ms per project evaluation even when restored — see dotnet/msbuild#4025) +- **Fixes**: reduce Directory.Build.props complexity, use `false` for legacy projects with explicit file lists, avoid NuGet-based SDK resolvers if possible +- See: `eval-performance` skill for detailed guidance + +### 6. NuGet Restore in Build + +- **Symptoms**: restore runs every build even when unnecessary +- **Fixes**: + - Separate restore from build: `dotnet restore` then `dotnet build --no-restore` + - Enable static graph evaluation: `true` in Directory.Build.props — can save significant time in large builds (results are workload-dependent) + +### 7. Large Project Count and Graph Shape + +- **Symptoms**: many small projects, each takes minimal time but overhead adds up; deep dependency chains serialize the build +- **Consider**: project consolidation, or use `/graph` mode for better scheduling +- **Graph shape matters**: a wide dependency graph (few levels, many parallel branches) builds faster than a deep one (many levels, serialized). Refactoring from deep to wide can yield significant improvements in both clean and incremental build times. +- **Actions**: look for unnecessary project dependencies, consider splitting a bottleneck project into two, or merging small leaf projects + +## Using Binlog Replay for Performance Analysis + +Step-by-step workflow using text log replay: + +1. **Replay with performance summary**: + ```bash + dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary + ``` +2. **Read target/task performance summaries** (at the end of `full.log`): + ```bash + grep "Target Performance Summary\|Task Performance Summary" -A 50 full.log + ``` + This shows all targets and tasks sorted by cumulative time — equivalent to finding expensive targets/tasks. +3. **Find per-project build times**: + ```bash + grep "done building project\|Project Performance Summary" full.log + ``` +4. **Check parallelism** (multi-node scheduling): + ```bash + grep -i "node.*assigned\|RequiresLeadingNewline\|Building with" full.log | head -30 + ``` +5. **Check analyzer overhead**: + ```bash + grep -i "Total analyzer execution time\|analyzer.*elapsed\|CompilerAnalyzerDriver" full.log + ``` +6. **Drill into a specific slow target**: + ```bash + grep 'Target "CoreCompile"\|Target "ResolveAssemblyReferences"' full.log + ``` + +## Quick Wins Checklist + +- [ ] Use `/maxcpucount` (or `-m`) for parallel builds +- [ ] Separate restore from build (`dotnet restore` then `dotnet build --no-restore`) +- [ ] Enable static graph restore (`true`) +- [ ] Enable hardlinks for Copy (`true`) +- [ ] Disable analyzers conditionally in dev inner loop: `false` +- [ ] Enable reference assemblies (`true`) +- [ ] Check for broken incremental builds (see `incremental-build` skill) +- [ ] Check for bin/obj clashes (see `check-bin-obj-clash` skill) +- [ ] Use graph build (`/graph`) for multi-project solutions +- [ ] Use `--artifacts-path` (.NET 8+) for centralized output layout +- [ ] Enable Dev Drive (ReFS) on Windows dev machines and self-hosted CI + +## Impact Categorization + +When reporting findings, categorize by impact to help prioritize fixes: + +- 🔴 **HIGH IMPACT** (do first): Items consuming >10% of total build time, or a single target >50% of build time +- 🟡 **MEDIUM IMPACT**: Items consuming 2-10% of build time +- 🟢 **QUICK WINS**: Easy changes with modest impact (e.g., property flags in Directory.Build.props) diff --git a/.agents/skills/check-bin-obj-clash/SKILL.md b/.agents/skills/check-bin-obj-clash/SKILL.md new file mode 100644 index 0000000000..fb2310af63 --- /dev/null +++ b/.agents/skills/check-bin-obj-clash/SKILL.md @@ -0,0 +1,334 @@ +--- +name: check-bin-obj-clash +description: "Detects MSBuild projects with conflicting OutputPath or IntermediateOutputPath. Only activate in MSBuild/.NET build context. USE FOR: builds failing with 'Cannot create a file when that file already exists', 'The process cannot access the file because it is being used by another process', intermittent build failures that succeed on retry, missing outputs in multi-project builds, multi-targeting builds where project.assets.json conflicts. Diagnoses when multiple projects or TFMs write to the same bin/obj directories due to shared OutputPath, missing AppendTargetFrameworkToOutputPath, or extra global properties like PublishReadyToRun creating redundant evaluations. DO NOT USE FOR: file access errors unrelated to MSBuild (OS-level locking), single-project single-TFM builds, non-MSBuild build systems. INVOKES: dotnet msbuild binlog replay, grep for output path analysis." +--- + +# Detecting OutputPath and IntermediateOutputPath Clashes + +## Overview + +This skill helps identify when multiple MSBuild project evaluations share the same `OutputPath` or `IntermediateOutputPath`. This is a common source of build failures including: + +- File access conflicts during parallel builds +- Missing or overwritten output files +- Intermittent build failures +- "File in use" errors +- **NuGet restore errors like `Cannot create a file when that file already exists`** - this strongly indicates multiple projects share the same `IntermediateOutputPath` where `project.assets.json` is written + +Clashes can occur between: +- **Different projects** sharing the same output directory +- **Multi-targeting builds** (e.g., `TargetFrameworks=net8.0;net9.0`) where the path doesn't include the target framework +- **Multiple solution builds** where the same project is built from different solutions in a single build + +**Note:** Project instances with `BuildProjectReferences=false` should be **ignored** when analyzing clashes - these are P2P reference resolution builds that only query metadata (via `GetTargetPath`) and do not actually write to output directories. + +## When to Use This Skill + +**Invoke this skill immediately when you see:** +- `Cannot create a file when that file already exists` during NuGet restore +- `The process cannot access the file because it is being used by another process` +- Intermittent build failures that succeed on retry +- Missing output files or unexpected overwriting + +## Step 1: Generate a Binary Log + +Use the `binlog-generation` skill to generate a binary log with the correct naming convention. + +## Step 2: Replay the Binary Log to Text + +```bash +dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log +``` + +## Step 3: List All Projects + +```bash +grep -i 'done building project\|Building project' full.log | grep -oP '"[^"]+\.csproj"' | sort -u +``` + +This lists all project files that participated in the build. + +## Step 4: Check for Multiple Evaluations per Project + +Multiple evaluations for the same project indicate multi-targeting or multiple build configurations: + +```bash +# Count how many times each project was evaluated +grep -c 'Evaluation started' full.log +grep 'Evaluation started.*\.csproj' full.log +``` + +## Step 5: Check Global Properties for Each Evaluation + +For each project, query the build properties to understand the build configuration: + +```bash +# Search the diagnostic log for evaluated property values +grep -i 'TargetFramework\|Configuration\|Platform\|RuntimeIdentifier' full.log | head -40 +``` + +Look for properties like `TargetFramework`, `Configuration`, `Platform`, and `RuntimeIdentifier` that should differentiate output paths. + +Also check **solution-related properties** to identify multi-solution builds: +- `SolutionFileName`, `SolutionName`, `SolutionPath`, `SolutionDir`, `SolutionExt` — differ when a project is built from multiple solutions +- `CurrentSolutionConfigurationContents` — the number of project entries reveals which solution an evaluation belongs to (e.g., 1 project vs ~49 projects) + +Look for **extra global properties that don't affect output paths** but create distinct MSBuild project instances: +- `PublishReadyToRun` — a publish setting that doesn't change `OutputPath` or `IntermediateOutputPath`, but MSBuild treats it as a distinct project instance, preventing result caching and causing redundant target execution (e.g., `CopyFilesToOutputDirectory` running again) +- Any other global property that differs between evaluations but doesn't contribute to path differentiation + +### Filter Out Non-Build Evaluations + +When analyzing clashes, filter evaluations based on the type of clash you're investigating: + +1. **For OutputPath clashes**: Exclude restore-phase evaluations (where `MSBuildRestoreSessionId` global property is set). These don't write to output directories. + +2. **For IntermediateOutputPath clashes**: Include restore-phase evaluations, as NuGet restore writes `project.assets.json` to the intermediate output path. + +3. **Always exclude `BuildProjectReferences=false`**: These are P2P metadata queries, not actual builds that write files. + +## Step 6: Get Output Paths for Each Project + +Query each project's output path properties: + +```bash +# From the diagnostic log - search for OutputPath assignments +grep -i 'OutputPath\s*=\|IntermediateOutputPath\s*=\|BaseOutputPath\s*=\|BaseIntermediateOutputPath\s*=' full.log | head -40 + +# Or query a specific project directly +dotnet msbuild MyProject.csproj -getProperty:OutputPath +dotnet msbuild MyProject.csproj -getProperty:IntermediateOutputPath +dotnet msbuild MyProject.csproj -getProperty:BaseOutputPath +dotnet msbuild MyProject.csproj -getProperty:BaseIntermediateOutputPath +``` + +## Step 7: Identify Clashes + +Compare the `OutputPath` and `IntermediateOutputPath` values across all evaluations: + +1. **Normalize paths** - Convert to absolute paths and normalize separators +2. **Group by path** - Find evaluations that share the same OutputPath or IntermediateOutputPath +3. **Report clashes** - Any group with more than one evaluation indicates a clash + +## Step 8: Verify Clashes via CopyFilesToOutputDirectory (Optional) + +As additional evidence for OutputPath clashes, check if multiple project builds execute the `CopyFilesToOutputDirectory` target to the same path. Note that not all clashes manifest here - compilation outputs and other targets may also conflict. + +```bash +# Search for CopyFilesToOutputDirectory target execution per project +grep 'Target "CopyFilesToOutputDirectory"' full.log + +# Look for Copy task messages showing file destinations +grep 'Copying file from\|SkipUnchangedFiles' full.log | head -30 +``` + +Look for evidence of clashes in the messages: +- `Copying file from "..." to "..."` - Active file writes +- `Did not copy from file "..." to file "..." because the "SkipUnchangedFiles" parameter was set to "true"` - Indicates a second build attempted to write to the same location + +The `SkipUnchangedFiles` skip message often masks clashes - the build succeeds but is vulnerable to race conditions in parallel builds. + +## Step 9: Check CoreCompile Execution Patterns (Optional) + +To understand which project instance did the actual compilation vs redundant work, check `CoreCompile`: + +```bash +grep 'Target "CoreCompile"' full.log +``` + +Compare the durations: +- The instance with a long `CoreCompile` duration (e.g., seconds) is the **primary build** that did the actual compilation +- Instances where `CoreCompile` was skipped (duration ~0-10ms) are **redundant builds** — they didn't recompile but may still run other targets like `CopyFilesToOutputDirectory` that write to the same output directory + +This helps distinguish the "real" build from redundant instances created by extra global properties or multi-solution builds. + +### Caveat: Multi-Solution Builds + +When analyzing multi-solution builds, note that the diagnostic log interleaves output from all projects. To determine which solution a project instance belongs to, search for `SolutionFileName` property assignments in the diagnostic log: + +```bash +grep -i "SolutionFileName\|CurrentSolutionConfigurationContents" full.log | head -20 +``` + +### Expected Output Structure + +For each evaluation, collect: +- Project file path +- Evaluation ID +- TargetFramework (if multi-targeting) +- Configuration +- OutputPath +- IntermediateOutputPath + +### Clash Detection Logic + +``` +For each unique OutputPath: + - If multiple evaluations share it → CLASH + +For each unique IntermediateOutputPath: + - If multiple evaluations share it → CLASH +``` + +## Common Causes and Fixes + +### Multi-targeting without TargetFramework in path + +**Problem:** Project uses `TargetFrameworks` but OutputPath doesn't vary by framework. + +```xml + +bin\$(Configuration)\ +``` + +**Fix:** Include TargetFramework in the path: + +```xml + +bin\$(Configuration)\$(TargetFramework)\ +``` + +Or rely on SDK defaults which handle this automatically: + +```xml +true +true +``` + +### Shared output directory across projects (CANNOT be fixed with AppendTargetFramework) + +**Problem:** Multiple projects explicitly set the same `BaseOutputPath` or `BaseIntermediateOutputPath`. + +```xml + +..\SharedOutput\ +..\SharedObj\ + + +..\SharedOutput\ +..\SharedObj\ +``` + +**IMPORTANT:** Even with `AppendTargetFrameworkToOutputPath=true`, this will still clash! .NET writes certain files directly to the `IntermediateOutputPath` without the TargetFramework suffix, including: + +- `project.assets.json` (NuGet restore output) +- Other NuGet-related files + +This causes errors like `Cannot create a file when that file already exists` during parallel restore. + +**Fix:** Each project MUST have a unique `BaseIntermediateOutputPath`. Do not share intermediate output directories across projects: + +```xml + +..\obj\ProjectA\ + + +..\obj\ProjectB\ +``` + +Or simply use the SDK defaults which place `obj` inside each project's directory. + +### RuntimeIdentifier builds clashing + +**Problem:** Building for multiple RIDs without RID in path. + +**Fix:** Ensure RuntimeIdentifier is in the path: + +```xml +true +``` + +### Multiple solutions building the same project + +**Problem:** A single build invokes multiple solutions (e.g., via MSBuild task or command line) that include the same project. Each solution build evaluates and builds the project independently, with different `Solution*` global properties that don't affect the output path. + +**How to detect:** Compare `SolutionFileName` and `CurrentSolutionConfigurationContents` across evaluations for the same project. Different values indicate multi-solution builds. For example: + +| Property | Eval from Solution A | Eval from Solution B | +|---|---|---| +| `SolutionFileName` | `BuildAnalyzers.sln` | `Main.slnx` | +| `CurrentSolutionConfigurationContents` | 1 project entry | ~49 project entries | +| `OutputPath` | `bin\Release\netstandard2.0\` | `bin\Release\netstandard2.0\` ← **clash** | + +**Example:** A repo build script builds `BuildAnalyzers.sln` then `Main.slnx`, and both solutions include `SharedAnalyzers.csproj`. Both builds write to `bin\Release\netstandard2.0\`. The first build compiles; the second skips compilation but still runs `CopyFilesToOutputDirectory`. + +**Fix:** Options include: +1. **Consolidate solutions** - Ensure each project is only built from one solution in a single build +2. **Use different configurations** - Build solutions with different `Configuration` values that result in different output paths +3. **Exclude duplicate projects** - Use solution filters or conditional project inclusion to avoid building the same project twice + +### Extra global properties creating redundant project instances + +**Problem:** A project is built multiple times within the same solution due to extra global properties (e.g., `PublishReadyToRun=false`) that create distinct MSBuild project instances. These properties don't affect output paths but prevent MSBuild from caching results across instances, causing redundant target execution. + +**How to detect:** Compare global properties across evaluations for the same project within the same solution (same `SolutionFileName`). Look for properties that differ but don't contribute to path differentiation: + +| Property | Eval A (from Razor.slnx) | Eval B (from Razor.slnx) | +|---|---|---| +| `PublishReadyToRun` | *(not set)* | `false` | +| `OutputPath` | `bin\Release\netstandard2.0\` | `bin\Release\netstandard2.0\` ← **clash** | + +This is particularly wasteful for projects where the extra property has no effect (e.g., `PublishReadyToRun` on a `netstandard2.0` class library that doesn't use ReadyToRun compilation). + +**Fix:** Options include: +1. **Remove the extra global property** - Investigate which parent target/task is injecting the property and prevent it from being passed to projects that don't need it +2. **Use `RemoveGlobalProperties` metadata** - On `ProjectReference` items, use `RemoveGlobalProperties="PublishReadyToRun"` to strip the property before building the referenced project +3. **Condition the property** - Only set the property on projects that actually use it (e.g., only for executable projects, not class libraries) + +## Example Workflow + +```bash +# 1. Replay the binlog +dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log + +# 2. List projects +grep 'done building project' full.log | grep -oP '"[^"]+\.csproj"' | sort -u + +# 3. Check OutputPath for each evaluation +grep -i 'OutputPath\s*=' full.log | sort -u +# e.g. OutputPath = bin\Debug\net8.0\ +# OutputPath = bin\Debug\net9.0\ + +# 4. Check IntermediateOutputPath +grep -i 'IntermediateOutputPath\s*=' full.log | sort -u +# e.g. IntermediateOutputPath = obj\Debug\net8.0\ +# IntermediateOutputPath = obj\Debug\net9.0\ + +# 5. Compare paths → No clash (paths differ by TargetFramework) +``` + +## Tips + +- Use `grep -i 'OutputPath\s*=' full.log | sort -u` to quickly find all OutputPath property assignments +- Check `BaseOutputPath` and `BaseIntermediateOutputPath` as they form the root of output paths +- The SDK default paths include `$(TargetFramework)` - clashes often occur when projects override these defaults +- Remember that paths may be relative - normalize to absolute paths before comparing +- **Cross-project IntermediateOutputPath clashes cannot be fixed with `AppendTargetFrameworkToOutputPath`** - files like `project.assets.json` are written directly to the intermediate path +- For multi-targeting clashes within the same project, `AppendTargetFrameworkToOutputPath=true` is the correct fix +- Common error messages indicating path clashes: + - `Cannot create a file when that file already exists` (NuGet restore) + - `The process cannot access the file because it is being used by another process` + - Intermittent build failures that succeed on retry + +### Global Properties to Check When Comparing Evaluations + +When multiple evaluations share an output path, compare these global properties to understand why: + +| Property | Affects OutputPath? | Notes | +|----------|---------------------|-------| +| `TargetFramework` | Yes | Different TFMs should have different paths | +| `RuntimeIdentifier` | Yes | Different RIDs should have different paths | +| `Configuration` | Yes | Debug vs Release | +| `Platform` | Yes | AnyCPU vs x64 etc. | +| `SolutionFileName` | No | Identifies which solution built the project — different values indicate multi-solution clash | +| `SolutionName` | No | Solution name without extension | +| `SolutionPath` | No | Full path to the solution file | +| `SolutionDir` | No | Directory containing the solution file | +| `CurrentSolutionConfigurationContents` | No | XML with project entries — count of entries reveals which solution | +| `BuildProjectReferences` | No | `false` = P2P query, not a real build - ignore these | +| `MSBuildRestoreSessionId` | No | Present = restore phase evaluation | +| `PublishReadyToRun` | No | Publish setting, doesn't change build output path but creates distinct project instances | + +## Testing Fixes + +After making changes to fix path clashes, clean and rebuild to verify. See the `binlog-generation` skill's "Cleaning the Repository" section on how to clean the repository while preserving binlog files. \ No newline at end of file diff --git a/.agents/skills/code-testing-agent/SKILL.md b/.agents/skills/code-testing-agent/SKILL.md new file mode 100644 index 0000000000..ff1afbaf3e --- /dev/null +++ b/.agents/skills/code-testing-agent/SKILL.md @@ -0,0 +1,200 @@ +--- +name: code-testing-agent +description: >- + Generates comprehensive, workable unit tests for any programming language + using a multi-agent pipeline. Use when asked to generate tests, write unit + tests, improve test coverage, add test coverage, or create test files. + Supports C#, TypeScript, JavaScript, Python, Go, Rust, Java, and more. + Orchestrates research, planning, and implementation phases to produce + tests that compile, pass, and follow project conventions. + DO NOT USE FOR: running existing tests, executing dotnet test, applying + test filters, detecting test platforms, or troubleshooting test execution + (use run-tests for all of these). +--- + +# Code Testing Generation Skill + +An AI-powered skill that generates comprehensive, workable unit tests for any programming language using a coordinated multi-agent pipeline. + +## When to Use This Skill + +Use this skill when you need to: + +- Generate unit tests for an entire project or specific files +- Improve test coverage for existing codebases +- Create test files that follow project conventions +- Write tests that actually compile and pass +- Add tests for new features or untested code + +## When Not to Use + +- Running or executing existing tests (use the `run-tests` skill) +- Migrating between test frameworks (use migration skills) +- Writing tests specifically for MSTest patterns (use `writing-mstest-tests`) +- Debugging failing test logic + +## How It Works + +This skill coordinates multiple specialized agents in a **Research → Plan → Implement** pipeline: + +### Pipeline Overview + +```text +┌─────────────────────────────────────────────────────────────┐ +│ TEST GENERATOR │ +│ Coordinates the full pipeline and manages state │ +└─────────────────────┬───────────────────────────────────────┘ + │ + ┌─────────────┼─────────────┐ + ▼ ▼ ▼ +┌───────────┐ ┌───────────┐ ┌───────────────┐ +│ RESEARCHER│ │ PLANNER │ │ IMPLEMENTER │ +│ │ │ │ │ │ +│ Analyzes │ │ Creates │ │ Writes tests │ +│ codebase │→ │ phased │→ │ per phase │ +│ │ │ plan │ │ │ +└───────────┘ └───────────┘ └───────┬───────┘ + │ + ┌─────────┬───────┼───────────┐ + ▼ ▼ ▼ ▼ + ┌─────────┐ ┌───────┐ ┌───────┐ ┌───────┐ + │ BUILDER │ │TESTER │ │ FIXER │ │LINTER │ + │ │ │ │ │ │ │ │ + │ Compiles│ │ Runs │ │ Fixes │ │Formats│ + │ code │ │ tests │ │ errors│ │ code │ + └─────────┘ └───────┘ └───────┘ └───────┘ +``` + +## Step-by-Step Instructions + +### Step 1: Determine the user request + +Make sure you understand what user is asking and for what scope. +When the user does not express strong requirements for test style, coverage goals, or conventions, source the guidelines from [unit-test-generation.prompt.md](unit-test-generation.prompt.md). This prompt provides best practices for discovering conventions, parameterization strategies, coverage goals (aim for 80%), and language-specific patterns. + +### Step 2: Invoke the Test Generator + +Start by calling the `code-testing-generator` agent with your test generation request: + +```text +Generate unit tests for [path or description of what to test], following the [unit-test-generation.prompt.md](unit-test-generation.prompt.md) guidelines +``` + +The Test Generator will manage the entire pipeline automatically. + +### Step 3: Research Phase (Automatic) + +The `code-testing-researcher` agent analyzes your codebase to understand: + +- **Language & Framework**: Detects C#, TypeScript, Python, Go, Rust, Java, etc. +- **Testing Framework**: Identifies MSTest, xUnit, Jest, pytest, go test, etc. +- **Project Structure**: Maps source files, existing tests, and dependencies +- **Build Commands**: Discovers how to build and test the project + +Output: `.testagent/research.md` + +### Step 4: Planning Phase (Automatic) + +The `code-testing-planner` agent creates a structured implementation plan: + +- Groups files into logical phases (2-5 phases typical) +- Prioritizes by complexity and dependencies +- Specifies test cases for each file +- Defines success criteria per phase + +Output: `.testagent/plan.md` + +### Step 5: Implementation Phase (Automatic) + +The `code-testing-implementer` agent executes each phase sequentially: + +1. **Read** source files to understand the API +2. **Write** test files following project patterns +3. **Build** using the `code-testing-builder` sub-agent to verify compilation +4. **Test** using the `code-testing-tester` sub-agent to verify tests pass +5. **Fix** using the `code-testing-fixer` sub-agent if errors occur +6. **Lint** using the `code-testing-linter` sub-agent for code formatting + +Each phase completes before the next begins, ensuring incremental progress. + +### Coverage Types + +- **Happy path**: Valid inputs produce expected outputs +- **Edge cases**: Empty values, boundaries, special characters +- **Error cases**: Invalid inputs, null handling, exceptions + +## State Management + +All pipeline state is stored in `.testagent/` folder: + +| File | Purpose | +| ------------------------ | ---------------------------- | +| `.testagent/research.md` | Codebase analysis results | +| `.testagent/plan.md` | Phased implementation plan | +| `.testagent/status.md` | Progress tracking (optional) | + +## Examples + +### Example 1: Full Project Testing + +```text +Generate unit tests for my Calculator project at C:\src\Calculator +``` + +### Example 2: Specific File Testing + +```text +Generate unit tests for src/services/UserService.ts +``` + +### Example 3: Targeted Coverage + +```text +Add tests for the authentication module with focus on edge cases +``` + +## Agent Reference + +| Agent | Purpose | +| -------------------------- | -------------------- | +| `code-testing-generator` | Coordinates pipeline | +| `code-testing-researcher` | Analyzes codebase | +| `code-testing-planner` | Creates test plan | +| `code-testing-implementer` | Writes test files | +| `code-testing-builder` | Compiles code | +| `code-testing-tester` | Runs tests | +| `code-testing-fixer` | Fixes errors | +| `code-testing-linter` | Formats code | + +## Requirements + +- Project must have a build/test system configured +- Testing framework should be installed (or installable) +- VS Code with GitHub Copilot extension + +## Troubleshooting + +### Tests don't compile + +The `code-testing-fixer` agent will attempt to resolve compilation errors. Check `.testagent/plan.md` for the expected test structure. Check the `extensions/` folder for language-specific error code references (e.g., `extensions/dotnet.md` for .NET). + +### Tests fail + +Most failures in generated tests are caused by **wrong expected values in assertions**, not production code bugs: + +1. Read the actual test output +2. Read the production code to understand correct behavior +3. Fix the assertion, not the production code +4. Never mark tests `[Ignore]` or `[Skip]` just to make them pass + +### Wrong testing framework detected + +Specify your preferred framework in the initial request: "Generate Jest tests for..." + +### Environment-dependent tests fail + +Tests that depend on external services, network endpoints, specific ports, or precise timing will fail in CI environments. Focus on unit tests with mocked dependencies instead. + +### Build fails on full solution + +During phase implementation, build only the specific test project for speed. After all phases, run a full non-incremental workspace build to catch cross-project errors. diff --git a/.agents/skills/code-testing-agent/extensions/dotnet.md b/.agents/skills/code-testing-agent/extensions/dotnet.md new file mode 100644 index 0000000000..c3f7866ae8 --- /dev/null +++ b/.agents/skills/code-testing-agent/extensions/dotnet.md @@ -0,0 +1,121 @@ +# .NET Extension + +Language-specific guidance for .NET (C#/F#/VB) test generation. + +## Build Commands + +| Scope | Command | +|-------|---------| +| Specific test project | `dotnet build MyProject.Tests.csproj` | +| Full solution (final validation) | `dotnet build MySolution.sln --no-incremental` | +| From repo root (no .sln) | `dotnet build --no-incremental` | + +- Use `--no-restore` if dependencies are already restored +- Use `-v:q` (quiet) to reduce output noise +- Always use `--no-incremental` for the final validation build — incremental builds hide errors like CS7036 + +## Test Commands + +| Scope | Command | +|-------|---------| +| All tests | `dotnet test` | +| Filtered | `dotnet test --filter "FullyQualifiedName~ClassName"` | +| After build | `dotnet test --no-build` | + +- Use `--no-build` if already built +- Use `-v:q` for quieter output + +## Lint Command + +```bash +dotnet format --include path/to/file.cs +dotnet format MySolution.sln # full solution +``` + +## Project Reference Validation + +Before writing test code, read the test project's `.csproj` to verify it has `` entries for the assemblies your tests will use. If a reference is missing, add it: + +```xml + + + +``` + +This prevents CS0234 ("namespace not found") and CS0246 ("type not found") errors. + +## Common CS Error Codes + +| Error | Meaning | Fix | +|-------|---------|-----| +| CS0234 | Namespace not found | Add `` to the source project in the test `.csproj` | +| CS0246 | Type not found | Add `using Namespace;` or add missing `` | +| CS0103 | Name not found | Check spelling, add `using` statement | +| CS1061 | Missing member | Verify method/property name matches the source code exactly | +| CS0029 | Type mismatch | Cast or change the type to match the expected signature | +| CS7036 | Missing required parameter | Read the constructor/method signature and pass all required arguments | + +## `.csproj` / `.sln` Handling + +- During phase implementation, build only the specific test `.csproj` for speed +- For the final validation, build the full `.sln` with `--no-incremental` +- Full-solution builds catch cross-project reference errors invisible in scoped builds + +### Registering a new test project + +If a new test project was created, register it with the solution so `dotnet test` can discover it: + +1. Use the exact solution or solution-filter target identified in `.testagent/research.md` or `.testagent/plan.md` — do not search for or substitute a different `.sln`, `.slnx`, or `.slnf` target. +2. If that target is a `.sln` or `.slnx`, run `dotnet sln add `. +3. If the target is a `.slnf` (solution filter), also ensure the new project is included in the filter; adding only to the underlying `.sln` may not be enough for test discovery. +4. Skip this if the project is already included in the solution or solution filter used for testing. +5. Prefer the researched test command. If you need to run the solution directly, use `dotnet test --solution ` only for repos on .NET SDK 10+ with MTP-style syntax; otherwise use the standard positional form `dotnet test `. + +## MSTest Template + +```csharp +using Microsoft.VisualStudio.TestTools.UnitTesting; + +namespace ProjectName.Tests; + +[TestClass] +public sealed class ClassNameTests +{ + [TestMethod] + public void MethodName_Scenario_ExpectedResult() + { + // Arrange + var sut = new ClassName(); + + // Act + var result = sut.MethodName(input); + + // Assert + Assert.AreEqual(expected, result); + } + + [TestMethod] + [DataRow(2, 3, 5, DisplayName = "Positive numbers")] + [DataRow(-1, 1, 0, DisplayName = "Negative and positive")] + public void Add_ValidInputs_ReturnsSum(int a, int b, int expected) + { + // Act + var result = _sut.Add(a, b); + + // Assert + Assert.AreEqual(expected, result); + } +} +``` + +## Coverage XML Parsing + +If `.testagent/initial_coverage.xml` exists, it uses Cobertura/VS format: + +- `module` elements with `line_coverage` attribute — identifies which assemblies have low coverage +- `function` elements with `line_coverage="0.00"` — identifies completely untested methods +- `range` elements with `covered="no"` — identifies specific uncovered lines + +## Skip Coverage Tools + +Do not configure or run code coverage measurement tools (coverlet, dotnet-coverage, XPlat Code Coverage). These tools have inconsistent cross-configuration behavior and waste significant time. Coverage is measured separately by the evaluation harness. diff --git a/.agents/skills/code-testing-agent/unit-test-generation.prompt.md b/.agents/skills/code-testing-agent/unit-test-generation.prompt.md new file mode 100644 index 0000000000..ccdbbbc2bc --- /dev/null +++ b/.agents/skills/code-testing-agent/unit-test-generation.prompt.md @@ -0,0 +1,173 @@ +--- +description: >- + Best practices and guidelines for generating comprehensive, + parameterized unit tests with 80% code coverage across any programming + language +--- + +# Unit Test Generation Prompt + +You are an expert code generation assistant specialized in writing concise, effective, and logical unit tests. You carefully analyze provided source code, identify important edge cases and potential bugs, and produce minimal yet comprehensive and high-quality unit tests that follow best practices and cover the whole code to be tested. Aim for 80% code coverage. + +## Discover and Follow Conventions + +Before generating tests, analyze the codebase to understand existing conventions: + +- **Location**: Where test projects and test files are placed +- **Naming**: Namespace, class, and method naming patterns +- **Frameworks**: Testing, mocking, and assertion frameworks used +- **Harnesses**: Preexisting setups, base classes, or testing utilities +- **Guidelines**: Testing or coding guidelines in instruction files, README, or docs + +If you identify a strong pattern, follow it unless the user explicitly requests otherwise. If no pattern exists and there's no user guidance, use your best judgment. + +## Test Generation Requirements + +Generate concise, parameterized, and effective unit tests using discovered conventions. + +- **Prefer mocking** over generating one-off testing types +- **Prefer unit tests** over integration tests, unless integration tests are clearly needed and can run locally +- **Traverse code thoroughly** to ensure high coverage (80%+) of the entire scope +- Continue generating tests until you reach the coverage target or have covered all non-trivial public surface area + +### Key Testing Goals + +| Goal | Description | +| ----------------------------- | ---------------------------------------------------------------------------------------------------- | +| **Minimal but Comprehensive** | Avoid redundant tests | +| **Logical Coverage** | Focus on meaningful edge cases, domain-specific inputs, boundary values, and bug-revealing scenarios | +| **Core Logic Focus** | Test positive cases and actual execution logic; avoid low-value tests for language features | +| **Balanced Coverage** | Don't let negative/edge cases outnumber tests of actual logic | +| **Best Practices** | Use Arrange-Act-Assert pattern and proper naming (`Method_Condition_ExpectedResult`) | +| **Buildable & Complete** | Tests must compile, run, and contain no hallucinated or missed logic | + +## Parameterization + +- Prefer parameterized tests (e.g., `[DataRow]`, `[Theory]`, `@pytest.mark.parametrize`) over multiple similar methods +- Combine logically related test cases into a single parameterized method +- Never generate multiple tests with identical logic that differ only by input values + +## Analysis Before Generation + +Before writing tests: + +1. **Analyze** the code line by line to understand what each section does +2. **Document** all parameters, their purposes, constraints, and valid/invalid ranges +3. **Identify** potential edge cases and error conditions +4. **Describe** expected behavior under different input conditions +5. **Note** dependencies that need mocking +6. **Consider** concurrency, resource management, or special conditions +7. **Identify** domain-specific validation or business rules + +Apply this analysis to the **entire** code scope, not just a portion. + +## Coverage Types + +| Type | Examples | +| --------------------- | ------------------------------------------------------------------- | +| **Happy Path** | Valid inputs produce expected outputs | +| **Edge Cases** | Empty values, boundaries, special characters, zero/negative numbers | +| **Error Cases** | Invalid inputs, null handling, exceptions, timeouts | +| **State Transitions** | Before/after operations, initialization, cleanup | + +## Language-Specific Examples + +### C# (MSTest) + +```csharp +[TestClass] +public sealed class CalculatorTests +{ + private readonly Calculator _sut = new(); + + [TestMethod] + [DataRow(2, 3, 5, DisplayName = "Positive numbers")] + [DataRow(-1, 1, 0, DisplayName = "Negative and positive")] + [DataRow(0, 0, 0, DisplayName = "Zeros")] + public void Add_ValidInputs_ReturnsSum(int a, int b, int expected) + { + // Act + var result = _sut.Add(a, b); + + // Assert + Assert.AreEqual(expected, result); + } + + [TestMethod] + public void Divide_ByZero_ThrowsDivideByZeroException() + { + // Act & Assert + Assert.ThrowsException(() => _sut.Divide(10, 0)); + } +} +``` + +### TypeScript (Jest) + +```typescript +describe("Calculator", () => { + let sut: Calculator; + + beforeEach(() => { + sut = new Calculator(); + }); + + it.each([ + [2, 3, 5], + [-1, 1, 0], + [0, 0, 0], + ])("add(%i, %i) returns %i", (a, b, expected) => { + expect(sut.add(a, b)).toBe(expected); + }); + + it("divide by zero throws error", () => { + expect(() => sut.divide(10, 0)).toThrow("Division by zero"); + }); +}); +``` + +### Python (pytest) + +```python +import pytest +from calculator import Calculator + +class TestCalculator: + @pytest.fixture + def sut(self): + return Calculator() + + @pytest.mark.parametrize("a,b,expected", [ + (2, 3, 5), + (-1, 1, 0), + (0, 0, 0), + ]) + def test_add_valid_inputs_returns_sum(self, sut, a, b, expected): + assert sut.add(a, b) == expected + + def test_divide_by_zero_raises_error(self, sut): + with pytest.raises(ZeroDivisionError): + sut.divide(10, 0) +``` + +## Output Requirements + +- Tests must be **complete and buildable** with no placeholder code +- Follow the **exact conventions** discovered in the target codebase +- Include **appropriate imports** and setup code +- Add **brief comments** explaining non-obvious test purposes +- Place tests in the **correct location** following project structure + +## Build and Verification + +- **Scoped builds during development**: Build the specific test project during implementation for faster iteration +- **Final full-workspace build**: After all test generation is complete, run a full non-incremental build from the workspace root to catch cross-project errors +- **API signature verification**: Before calling any method in test code, verify the exact parameter types, count, and order by reading the source code +- **Project reference validation**: Before writing test code, verify the test project references all source projects the tests will use. Check the `extensions/` folder for language-specific guidance (e.g., `extensions/dotnet.md` for .NET) + +## Test Scope Guidelines + +- **Write unit tests, not integration/acceptance tests**: Focus on testing individual classes and methods with mocked dependencies +- **No external dependencies**: Never write tests that call external URLs, bind to network ports, require service discovery, or depend on precise timing +- **Mock everything external**: HTTP clients, database connections, file systems, network endpoints — all should be mocked in unit tests +- **Fix assertions, not production code**: When tests fail, read the production code, understand its actual behavior, and update the test assertion diff --git a/.agents/skills/coverage-analysis/SKILL.md b/.agents/skills/coverage-analysis/SKILL.md new file mode 100644 index 0000000000..ca8e307f9f --- /dev/null +++ b/.agents/skills/coverage-analysis/SKILL.md @@ -0,0 +1,472 @@ +--- +name: coverage-analysis +description: > + Automated, project-wide code coverage and CRAP (Change Risk Anti-Patterns) + score analysis for .NET projects with existing unit tests. Auto-detects + solution structure, runs coverage collection via `dotnet test` (supports both + Microsoft.Testing.Extensions.CodeCoverage and Coverlet), generates reports via + ReportGenerator, calculates CRAP scores per method, and surfaces risk + hotspots — complex code with low test coverage that is dangerous to modify. + Use when the user wants project-wide coverage analysis with risk + prioritization, coverage gap identification, CRAP score computation + across an entire solution, or to diagnose why coverage is stuck or + plateaued and identify what methods are blocking improvement. + DO NOT USE FOR: targeted single-method CRAP analysis (use crap-score skill), + writing tests, running tests without coverage collection, applying test + filters, producing TRX reports, or troubleshooting test execution (use + run-tests for all of these). +--- + +# Coverage Analysis + +## Purpose + +Raw coverage percentages answer "what code was executed?" — they don't answer what you actually need to know: + +- **What tests should I write next?** — ranked by risk and impact +- **Which uncovered code is risky vs. trivial?** — CRAP scores separate the two +- **Why has coverage plateaued?** — identify the files blocking further gains +- **Is this code safe to refactor?** — complex + uncovered = dangerous to change + +This skill bridges that gap: from a bare .NET solution to a prioritized risk hotspot list, with no manual tool configuration required. + +## When to Use + +Use this skill when the user mentions test coverage, coverage gaps, code risk, CRAP scores, where to add tests, why coverage plateaued, or wants to know which code is safest to refactor — even if they don't explicitly say "coverage analysis". + +## When Not to Use + +- **Targeted single-method CRAP analysis** — use the `crap-score` skill instead +- **Writing or generating tests** — this skill identifies where tests are needed, not write them +- **General test execution** unrelated to coverage or CRAP analysis +- **Coverage reporting without CRAP context** — use `dotnet test` with coverage collection directly + +## Inputs + +| Input | Required | Default | Description | +|-------|----------|---------|-------------| +| Project/solution path | No | Current directory | Path to the .NET solution or project | +| Line coverage threshold | No | 80% | Minimum acceptable line coverage | +| Branch coverage threshold | No | 70% | Minimum acceptable branch coverage | +| CRAP threshold | No | 30 | Maximum acceptable CRAP score before flagging | +| Top N hotspots | No | 10 | Number of risk hotspots to surface | + +### Prerequisites + +- .NET SDK installed (`dotnet` on PATH) +- At least one test project referencing the production code (xUnit, NUnit, or MSTest) +- Internet access for `dotnet tool install` (ReportGenerator) on first run, or ReportGenerator already installed globally + +The skill auto-detects coverage provider state per test project and selects the least-invasive execution strategy: + +- unified Microsoft CodeCoverage when all projects use it, +- unified Coverlet when no project uses Microsoft CodeCoverage, +- per-project provider execution when the solution is truly mixed. + +No pre-existing runsettings files or manually installed tools required. + +## Workflow + +If the user provides a path to existing Cobertura XML (or coverage data is already present in `TestResults/`), skip Steps 3–4 (test execution and provider detection) but **still run Steps 5–6** (ReportGenerator and CRAP score computation). The Risk Hotspots table and CRAP scores are mandatory in every output — they are the skill's core value-add over raw coverage numbers. + +The workflow runs in four phases. Phases 2 and 3 each contain steps that can run in parallel to reduce total wall-clock time. + +### Phase 1 — Setup (sequential) + +#### Step 1: Locate the solution or project + +Given the user's path (default: current directory), find the entry point: + +```powershell +$root = "" + +# Prefer solution file; fall back to project file +$sln = Get-ChildItem -Path $root -Filter "*.sln" -Recurse -Depth 2 -ErrorAction SilentlyContinue | + Select-Object -First 1 +if ($sln) { + Write-Host "ENTRY_TYPE:Solution"; Write-Host "ENTRY:$($sln.FullName)" +} else { + $project = Get-ChildItem -Path $root -Filter "*.csproj" -Recurse -Depth 2 -ErrorAction SilentlyContinue | + Select-Object -First 1 + if ($project) { + Write-Host "ENTRY_TYPE:Project"; Write-Host "ENTRY:$($project.FullName)" + } else { + Write-Host "ENTRY_TYPE:NotFound" + } +} + +# Test projects: search path first, then git root, then parent +$searchRoots = @($root) +$gitRoot = (git -C $root rev-parse --show-toplevel 2>$null) +if ($gitRoot) { $gitRoot = [System.IO.Path]::GetFullPath($gitRoot) } +if ($gitRoot -and $gitRoot -ne $root) { $searchRoots += $gitRoot } +$parentPath = Split-Path $root -Parent +if ($parentPath -and $parentPath -ne $root -and $parentPath -ne $gitRoot) { $searchRoots += $parentPath } + +$testProjects = @() +foreach ($sr in $searchRoots) { + # Primary: match by .csproj content (test framework references) + $testProjects = @(Get-ChildItem -Path $sr -Filter "*.csproj" -Recurse -Depth 5 -ErrorAction SilentlyContinue | + Where-Object { $_.FullName -notmatch '([/\\]obj[/\\]|[/\\]bin[/\\])' } | + Where-Object { (Select-String -Path $_.FullName -Pattern 'Microsoft\.NET\.Test\.Sdk|xunit|nunit|MSTest\.TestAdapter|"MSTest"|MSTest\.TestFramework|TUnit' -Quiet) }) + if ($testProjects.Count -gt 0) { + if ($sr -ne $root) { Write-Host "SEARCHED:$sr" } + break + } +} + +# Fallback: match by file name convention +if ($testProjects.Count -eq 0) { + foreach ($sr in $searchRoots) { + $testProjects = @(Get-ChildItem -Path $sr -Filter "*.csproj" -Recurse -Depth 5 -ErrorAction SilentlyContinue | + Where-Object { $_.Name -match '(?i)(test|spec)' }) + if ($testProjects.Count -gt 0) { + if ($sr -ne $root) { Write-Host "SEARCHED:$sr" } + break + } + } +} +Write-Host "TEST_PROJECTS:$($testProjects.Count)" +$testProjects | ForEach-Object { Write-Host "TEST_PROJECT:$($_.FullName)" } + +# Resolve the test output root (where coverage-analysis artifacts will be written) +if ($testProjects.Count -eq 1) { + $testOutputRoot = $testProjects[0].DirectoryName +} else { + # Multiple test projects — find their deepest common parent directory + $dirs = $testProjects | ForEach-Object { $_.DirectoryName } + $common = $dirs[0] + foreach ($d in $dirs[1..($dirs.Count-1)]) { + $sep = [System.IO.Path]::DirectorySeparatorChar + while (-not $d.StartsWith("$common$sep", [System.StringComparison]::OrdinalIgnoreCase) -and $d -ne $common) { + $prevCommon = $common + $common = Split-Path $common -Parent + # Terminate if we can no longer move up (at filesystem root or no parent) + if ([string]::IsNullOrEmpty($common) -or $common -eq $prevCommon) { + $common = $null + break + } + } + } + if ([string]::IsNullOrEmpty($common)) { + # Fallback when no common parent directory exists (e.g., projects on different drives) + if ($gitRoot) { + $testOutputRoot = $gitRoot + } else { + $testOutputRoot = $root + } + } else { + $testOutputRoot = $common + } +} +Write-Host "TEST_OUTPUT_ROOT:$testOutputRoot" +``` + +- If `ENTRY_TYPE:NotFound` and test projects were found → use the test projects directly as entry points (run `dotnet test` on each test `.csproj`). +- If `ENTRY_TYPE:NotFound` and no test projects found → stop: `No .sln or test projects found under . Provide the path to your .NET solution or project.` +- If `TEST_PROJECTS:0` → stop: `No test projects found (expected projects with 'Test' or 'Spec' in the name). Ensure your solution has unit test projects before running coverage analysis.` + +#### Step 2: Create the output directory + +```powershell +$coverageDir = Join-Path $testOutputRoot "TestResults" "coverage-analysis" +if (Test-Path $coverageDir) { Remove-Item $coverageDir -Recurse -Force } +New-Item -ItemType Directory -Path $coverageDir -Force | Out-Null +Write-Host "COVERAGE_DIR:$coverageDir" +``` + +#### Step 2b: Recommend ignoring `TestResults/` + +```powershell +$pattern = "**/TestResults/" +$gitRoot = (git -C $testOutputRoot rev-parse --show-toplevel 2>$null) +if ($gitRoot) { $gitRoot = [System.IO.Path]::GetFullPath($gitRoot) } +if ($gitRoot) { + $gitignorePath = Join-Path $gitRoot ".gitignore" + $alreadyIgnored = $false + if (Test-Path $gitignorePath) { + $alreadyIgnored = (Select-String -Path $gitignorePath -Pattern '^\s*(\*\*/)?TestResults/?\s*$' -Quiet) + } + if ($alreadyIgnored) { + Write-Host "GITIGNORE_RECOMMENDATION:already-present" + } else { + Write-Host "GITIGNORE_RECOMMENDATION:$pattern" + } +} else { + Write-Host "GITIGNORE_RECOMMENDATION:$pattern" +} +``` + +### Phase 2 — Data collection (Steps 3 and 4 run in parallel) + +Steps 3 and 4 are independent — start both simultaneously. `dotnet test` is the slowest step, and ReportGenerator setup doesn't need coverage files, so running them concurrently cuts wall time significantly. + +#### Step 3: Detect coverage provider and run `dotnet test` with coverage collection + +Before running tests, detect which coverage provider the test projects use. Projects may reference +`Microsoft.Testing.Extensions.CodeCoverage` (Microsoft's built-in provider, common on .NET 9+) or +`coverlet.collector` (open-source, the default in xUnit templates). The provider determines which +`dotnet test` arguments to use — both produce Cobertura XML. + +```powershell +# Detect coverage provider per test project +$coverageProvider = "unknown" # will be set to "ms-codecoverage" or "coverlet" +$msCodeCovProjects = @() +$coverletProjects = @() +$neitherProjects = @() + +foreach ($tp in $testProjects) { + $hasMsCodeCov = Select-String -Path $tp.FullName -Pattern 'Microsoft\.Testing\.Extensions\.CodeCoverage' -Quiet + $hasCoverlet = Select-String -Path $tp.FullName -Pattern 'coverlet\.collector' -Quiet + if ($hasMsCodeCov) { $msCodeCovProjects += $tp } + elseif ($hasCoverlet) { $coverletProjects += $tp } + else { $neitherProjects += $tp } +} + +# Determine the provider strategy +if ($msCodeCovProjects.Count -gt 0 -and $coverletProjects.Count -eq 0) { + $coverageProvider = "ms-codecoverage" + Write-Host "COVERAGE_PROVIDER:ms-codecoverage (ms:$($msCodeCovProjects.Count), none:$($neitherProjects.Count))" +} elseif ($coverletProjects.Count -gt 0 -and $msCodeCovProjects.Count -eq 0) { + $coverageProvider = "coverlet" + Write-Host "COVERAGE_PROVIDER:coverlet (coverlet:$($coverletProjects.Count), none:$($neitherProjects.Count))" +} elseif ($msCodeCovProjects.Count -gt 0 -and $coverletProjects.Count -gt 0) { + $coverageProvider = "mixed-project" + Write-Host "COVERAGE_PROVIDER:mixed-project (ms:$($msCodeCovProjects.Count), coverlet:$($coverletProjects.Count), none:$($neitherProjects.Count))" +} else { + $coverageProvider = "coverlet" + Write-Host "COVERAGE_PROVIDER:none-detected — defaulting to coverlet" +} +``` + +If any discovered test projects have no provider, add one based on the selected strategy: + +```powershell +if ($coverageProvider -eq "ms-codecoverage" -and $neitherProjects.Count -gt 0) { + Write-Host "ADDING_MS_CODECOVERAGE:$($neitherProjects.Count) project(s)" + foreach ($tp in $neitherProjects) { + dotnet add $tp.FullName package Microsoft.Testing.Extensions.CodeCoverage --no-restore + Write-Host " ADDED_MS_CODECOVERAGE:$($tp.FullName)" + } + foreach ($tp in $neitherProjects) { + dotnet restore $tp.FullName --quiet + } +} + +if (($coverageProvider -eq "coverlet" -or $coverageProvider -eq "mixed-project") -and $neitherProjects.Count -gt 0) { + Write-Host "ADDING_COVERLET:$($neitherProjects.Count) project(s)" + foreach ($tp in $neitherProjects) { + dotnet add $tp.FullName package coverlet.collector --no-restore + Write-Host " ADDED:$($tp.FullName)" + } + foreach ($tp in $neitherProjects) { + dotnet restore $tp.FullName --quiet + } +} +``` + +Log each addition to the console so the developer sees what changed. Document the additions in the final report (see Output Format). + +Run one `dotnet test` per entry point for the selected strategy: + +- In `ms-codecoverage` or `coverlet` mode: run a single command for the solution entry (or one per test project if no `.sln` was found). +- In `mixed-project` mode: run one command per test project, using that project's existing provider to avoid dual-provider conflicts. + +**Coverlet** (`coverlet.collector`): + +```powershell +$rawDir = Join-Path "" "raw" +dotnet test "" ` + --collect:"XPlat Code Coverage" ` + --results-directory $rawDir ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Format=cobertura ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Include="[*]*" ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Exclude="[*.Tests]*,[*.Test]*,[*Tests]*,[*Test]*,[*.Specs]*,[*.Testing]*" ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.SkipAutoProps=true +``` + +**Microsoft CodeCoverage** (`Microsoft.Testing.Extensions.CodeCoverage`): + +The command syntax depends on the .NET SDK version. In .NET 9, Microsoft.Testing.Platform arguments +must be passed after the `--` separator. In .NET 10+, `--coverage` is a top-level `dotnet test` flag. + +```powershell +$rawDir = Join-Path "" "raw" + +# Detect SDK version for correct argument placement +$sdkVersion = (dotnet --version 2>$null) +$major = if ($sdkVersion -match '^(\d+)\.') { [int]$Matches[1] } else { 9 } + +if ($major -ge 10) { + # .NET 10+: --coverage is a first-class dotnet test flag + dotnet test "" ` + --results-directory $rawDir ` + --coverage ` + --coverage-output-format cobertura ` + --coverage-output $rawDir +} else { + # .NET 9: pass Microsoft.Testing.Platform arguments after the -- separator + dotnet test "" ` + --results-directory $rawDir ` + -- --coverage --coverage-output-format cobertura --coverage-output $rawDir +} +``` + +**Mixed-project mode** (`Microsoft.Testing.Extensions.CodeCoverage` + `coverlet.collector` in the same solution): + +```powershell +$rawDir = Join-Path "" "raw" +$sdkVersion = (dotnet --version 2>$null) +$major = if ($sdkVersion -match '^(\d+)\.') { [int]$Matches[1] } else { 9 } + +foreach ($tp in $testProjects) { + $hasMsCodeCov = Select-String -Path $tp.FullName -Pattern 'Microsoft\.Testing\.Extensions\.CodeCoverage' -Quiet + if ($hasMsCodeCov) { + if ($major -ge 10) { + dotnet test $tp.FullName --results-directory $rawDir --coverage --coverage-output-format cobertura --coverage-output $rawDir + } else { + dotnet test $tp.FullName --results-directory $rawDir -- --coverage --coverage-output-format cobertura --coverage-output $rawDir + } + } else { + dotnet test $tp.FullName ` + --collect:"XPlat Code Coverage" ` + --results-directory $rawDir ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Format=cobertura ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Include="[*]*" ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.Exclude="[*.Tests]*,[*.Test]*,[*Tests]*,[*Test]*,[*.Specs]*,[*.Testing]*" ` + -- DataCollectionRunSettings.DataCollectors.DataCollector.Configuration.SkipAutoProps=true + } +} +``` + +Exit code handling: + +- **0** — all tests passed, coverage collected +- **1** — some tests failed (coverage still collected — proceed with a warning) +- **Other** — build failure; stop and report the error + +After the run, locate coverage files: + +```powershell +$coberturaFiles = Get-ChildItem -Path (Join-Path "" "raw") -Filter "coverage.cobertura.xml" -Recurse +Write-Host "COBERTURA_COUNT:$($coberturaFiles.Count)" +$coberturaFiles | ForEach-Object { Write-Host "COBERTURA:$($_.FullName)" } +$vsCovFiles = Get-ChildItem -Path (Join-Path "" "raw") -Filter "*.coverage" -Recurse -ErrorAction SilentlyContinue +if ($vsCovFiles) { Write-Host "VS_BINARY_COVERAGE:$($vsCovFiles.Count)" } +``` + +If `COBERTURA_COUNT` is 0: + +- If `VS_BINARY_COVERAGE` > 0: warn the user — *"Found .coverage files (VS binary format) but no Cobertura XML. These were likely produced by Visual Studio's built-in collector, which outputs a binary format by default. This skill needs Cobertura XML. Re-running with the detected provider configured for Cobertura output."* Then re-run the appropriate `dotnet test` command above (Coverlet or Microsoft CodeCoverage) with Cobertura format. +- If no `.coverage` files either: stop and report — *"Coverage files not generated. Ensure `dotnet test` completed successfully and check the build output for errors."* + +#### Step 4: Verify or install ReportGenerator (parallel with Step 3) + +```powershell +$rgAvailable = $false +$rgCommand = Get-Command reportgenerator -ErrorAction SilentlyContinue +if ($rgCommand) { + $rgAvailable = $true + Write-Host "RG_INSTALLED:already-present" +} else { + $rgToolPath = Join-Path "" ".tools" + dotnet tool install dotnet-reportgenerator-globaltool --tool-path $rgToolPath + if ($LASTEXITCODE -eq 0) { + $env:PATH = "$rgToolPath$([System.IO.Path]::PathSeparator)$env:PATH" + $rgCommand = Get-Command reportgenerator -ErrorAction SilentlyContinue + if ($rgCommand) { + $rgAvailable = $true + Write-Host "RG_INSTALLED:true (tool-path: $rgToolPath)" + } else { + Write-Host "RG_INSTALLED:false" + Write-Host "RG_INSTALL_ERROR:reportgenerator-not-available" + } + } else { + Write-Host "RG_INSTALLED:false" + Write-Host "RG_INSTALL_ERROR:reportgenerator-not-available" + } +} +Write-Host "RG_AVAILABLE:$rgAvailable" +``` + +If installation fails (no internet), keep `RG_AVAILABLE:false` and continue with raw Cobertura XML parsing + script-based analysis in Step 6. Skip HTML/Text/CSV report generation in Step 5 and note this in the output. + +### Phase 3 — Analysis (Steps 5 and 6 run in parallel) + +Once Phase 2 completes (coverage files available, ReportGenerator ready), start Steps 5 and 6 simultaneously — both read from the same Cobertura XML and produce independent outputs. + +#### Step 5: Generate reports with ReportGenerator (parallel with Step 6) + +```powershell +$reportsDir = Join-Path "" "reports" +if ($rgAvailable) { + reportgenerator ` + -reports:"" ` + -targetdir:$reportsDir ` + -reporttypes:"Html;TextSummary;MarkdownSummaryGithub;CsvSummary" ` + -title:"Coverage Report" ` + -tag:"coverage-analysis-skill" + + Get-Content (Join-Path $reportsDir "Summary.txt") -ErrorAction SilentlyContinue +} else { + Write-Host "REPORTGENERATOR_SKIPPED:true" +} +``` + +#### Step 6: Calculate CRAP scores using the bundled script (parallel with Step 5) + +Run `scripts/Compute-CrapScores.ps1` (co-located with this SKILL.md). It reads all Cobertura XML files, applies `CRAP(m) = comp² × (1 − cov)³ + comp` per method, and returns the top-N hotspots as JSON. + +To locate the script: find the directory containing this skill's `SKILL.md` file (the skill loader provides this context), then resolve `scripts/Compute-CrapScores.ps1` relative to it. If the script path cannot be determined, calculate CRAP scores inline using the formula below. + +```powershell +& "/scripts/Compute-CrapScores.ps1" ` + -CoberturaPath @() ` + -CrapThreshold ` + -TopN +``` + +Script outputs: `TOTAL_METHODS:`, `FLAGGED_METHODS:`, `HOTSPOTS:` (top-N sorted by CrapScore descending). + +Also run `scripts/Extract-MethodCoverage.ps1` to get per-method coverage data for the Coverage Gaps table: + +```powershell +& "/scripts/Extract-MethodCoverage.ps1" ` + -CoberturaPath @() ` + -CoverageThreshold ` + -BranchThreshold ` + -Filter below-threshold +``` + +Script outputs: JSON array of methods below the coverage threshold, sorted by coverage ascending. Use this data to populate the Coverage Gaps by File table in the report. + +### Phase 4 — Output (sequential) + +#### Step 7: Build the output report + +Compose the analysis and save it to `TestResults/coverage-analysis/coverage-analysis.md` under the test project directory. Print the full report to the console. + +After saving the file, automatically open `TestResults/coverage-analysis/coverage-analysis.md` in the editor so the user can review it immediately. + +- In editor-hosted environments (VS Code, Visual Studio, or other IDE hosts): open the file in the current host session/editor context after writing it. +- Do not launch a different app instance via hardcoded shell commands (for example `code`, `start`, or platform-specific open commands) unless the host has no native open-file mechanism. +- In CLI or non-editor environments: print the absolute report path and clearly state that the file was generated. + +Do not ask for confirmation before opening the report file. + +Use `references/output-format.md` verbatim for all fixed headings, table structures, symbols, and emoji in the generated report. Use `references/guidelines.md` for execution constraints, prioritization rules, and style. + +## Validation + +- Verify that at least one `coverage.cobertura.xml` file was generated after `dotnet test` +- Confirm `TestResults/coverage-analysis/coverage-analysis.md` was written and contains data +- Spot-check one method's CRAP score: `comp² × (1 − cov)³ + comp` — a method with 100% coverage should have CRAP = complexity +- If ReportGenerator ran, verify `TestResults/coverage-analysis/reports/index.html` exists + +## Common Pitfalls + +- **No Cobertura XML generated** — the test project may lack a coverage provider. The skill auto-adds one, but if `dotnet add package` fails (offline/proxy), coverage collection silently produces nothing. Check for `.coverage` binary files as a fallback indicator. +- **Test failures (exit code 1)** — coverage is still collected from passing tests. Do not abort; proceed with partial data and note the failures in the summary. +- **ReportGenerator install failure** — if `dotnet tool install` fails (no internet), skip HTML/CSV report generation and continue with raw Cobertura XML analysis + script-based CRAP scores. Note the skip in the report. +- **Method name mismatches in Cobertura** — async methods, lambdas, and local functions may have compiler-generated names. The scripts use the Cobertura method name/signature directly; verify against source if results look unexpected. +- **Mixed coverage providers** — when a solution contains both Coverlet and Microsoft CodeCoverage projects, the skill runs per-project to avoid dual-provider conflicts. This is slower but correct. diff --git a/.agents/skills/coverage-analysis/references/guidelines.md b/.agents/skills/coverage-analysis/references/guidelines.md new file mode 100644 index 0000000000..cb382248f8 --- /dev/null +++ b/.agents/skills/coverage-analysis/references/guidelines.md @@ -0,0 +1,59 @@ +# Guidelines + +**Don't modify source or production code.** The only permitted project file modifications are adding a coverage provider package to test projects that currently have no provider: `coverlet.collector` (coverlet/mixed modes) or `Microsoft.Testing.Extensions.CodeCoverage` (ms-codecoverage mode). Do not add a second provider to projects that already have one. Always log package additions and document revert commands in the report. Write all other output to `TestResults/coverage-analysis/` under the test project directory. + +**Always show and open the generated markdown report.** After writing `TestResults/coverage-analysis/coverage-analysis.md`, print its contents to the console and open the file in the current host editor/session automatically (when an editor is available). + +**Don't generate new tests during the initial analysis run.** This skill surfaces where tests are needed. Test generation is a separate follow-up step outside the scope of this skill. + +**Use inline `dotnet test` arguments, not runsettings files.** Runsettings files require the developer to already know what they're doing — the whole point of this skill is that they shouldn't have to. Inline data collector args produce the same result with zero configuration. + +**Show the risk hotspots table even when all thresholds pass.** A project at 90% line coverage can still have a method with cyclomatic complexity 20 and 0% branch coverage. The thresholds measure averages; the hotspot table finds outliers. Don't hide it just because the summary looks green. + +**Always compute and surface CRAP scores.** The Risk Hotspots table is mandatory in every analysis output, whether analyzing pre-existing data, freshly collected data, or diagnosing a plateau. Never skip CRAP score computation — it is the primary differentiator between this skill and raw `dotnet test` coverage output. + +**Continue past test failures (exit code 1).** If some tests fail, coverage is still collected from the passing tests — partial data is better than no data. Note the failures in the summary and proceed. Aborting would leave the developer with nothing actionable. + +**Run `dotnet test` only once per entry point during normal flow.** When a solution is found, run it once against the solution. When no solution is found, run it once per test project. A single recovery rerun is allowed only if the first run produced no Cobertura XML and only `.coverage` binary output. + +**CRAP threshold of 30 is the default for a reason.** Scores above 30 are widely cited (by the original researchers) as "needs immediate attention." Scores between 15 and 30 are moderate — flag them in the table but don't make them sound catastrophic. Scores ≤ 5 are generally fine. + +**Priority assignment for coverage gaps:** + +- **HIGH** — file has both a CRAP score above threshold AND coverage below threshold (the double failure is what makes it urgent) +- **MED** — coverage below threshold OR CRAP score above threshold, but not both +- **LOW** — coverage below threshold with all methods having complexity ≤ 2 (trivial code — missing coverage here is unlikely to hide real bugs) + +--- + +## Coverage Intelligence — Going Beyond the Numbers + +**Prioritize uncovered code that is** complex (cyclomatic complexity > 5), on critical paths (auth, payment, data access, error handling), or changed frequently. **Deprioritize** trivial getters (complexity 1–2), generated files (EF migrations, `*.Designer.cs`, `*.g.cs`), and DI/configuration glue code. + +**Coverage plateau diagnosis** — if coverage has stopped increasing, check for: `[Exclude]` attributes hiding large code sections, tests that execute code but assert nothing (inflated coverage without verification), or integration code that needs external dependencies (databases, file system). + +**AI-generated test quality** — coverage delta alone is insufficient. Flag methods where CRAP score is still above threshold after coverage increased (tests may be happy-path only), and methods covered by a single test with no branch variation. + +--- + +## Style + +- **Keep risk hotspots prominent and immediately after the summary section** — developers should find the highest-risk methods quickly +- **Quantify recommendations** — "adding 3 tests for `ProcessOrder` would cut the CRAP score from 48 to ~6" +- **Be direct** — skip preamble, get to the table +- **Emoji for visual scanning in generated output** (defined in `references/output-format.md`): + + | Symbol | Meaning | + |--------|---------| + | 🔥 | hotspots | + | 📋 | gaps | + | 💡 | recommendations | + | 📁 | reports | + | ✅ | passing | + | ❌ | failing | + | ⚠️ | warning | + | 🔴 | HIGH priority | + | 🟡 | MED priority | + | 🟢 | LOW priority | + +- **Always use Unicode emoji in generated output** — never shortcodes like `:x:` or `:fire:` diff --git a/.agents/skills/coverage-analysis/references/output-format.md b/.agents/skills/coverage-analysis/references/output-format.md new file mode 100644 index 0000000000..c768806eb1 --- /dev/null +++ b/.agents/skills/coverage-analysis/references/output-format.md @@ -0,0 +1,83 @@ +# Output Format + +Copy the template below **verbatim** for all fixed elements (headings, table headers, emoji, symbols). Only replace `` values with actual data. Do not substitute emoji with text equivalents, do not change `·` to `-`, do not change `×` to `x`, and do not drop section emoji prefixes. + +```markdown +# Coverage Analysis - + +| Metric | Value | +|--------|-------| +| **Date** | | +| **Line Coverage** | % | +| **Branch Coverage** | % | +| **Risk Hotspots** | (CRAP > ) | +| **Tests** | passed · failed | + +## Summary + +| Metric | Value | Threshold | Status | +|--------|-------|-----------|--------| +| **Line Coverage** | % | % | ✅ / ❌ | +| **Branch Coverage** | % | % | ✅ / ❌ | +| **Methods Analyzed** | | — | — | +| **Risk Hotspots** | | 0 | ✅ / ⚠️ | +| **Test Result** | | — | ✅ / ⚠️ | + +> Coverage collected from ** of test project(s)**. +> Reports saved to: `/reports/` + +If any coverage provider package was added to test projects, include this note after the summary: + +> ℹ️ **Coverage provider package updates** +> - `coverlet.collector` added to `` project(s): ``, `` +> - `Microsoft.Testing.Extensions.CodeCoverage` added to `` project(s): `` +> +> To revert: `git checkout -- ` + +If all test projects already had a coverage provider, omit this note. + +--- + +## 🔥 Risk Hotspots (Top by CRAP Score) + +Methods flagged as high-risk: complex code with low test coverage that is dangerous to change. + +| Rank | Method | Class | File | Complexity | Coverage | CRAP Score | +|------|--------|-------|------|-----------|---------|-----------| +| 1 | `` | `` | `` | | % | **** | +| … | … | … | … | … | … | … | + +> **CRAP Score** = `Complexity² × (1 − Coverage)³ + Complexity`. +> Scores above are flagged. A score ≤ 5 is considered safe. + +--- + +## 📋 Coverage Gaps by File + +Files below the line or branch coverage threshold, ordered by uncovered lines descending: + +| File | Line Coverage | Branch Coverage | Uncovered Lines | Priority | +|------|--------------|----------------|----------------|---------| +| `` | % | % | | 🔴 HIGH / 🟡 MED / 🟢 LOW | +| … | … | … | … | … | + +--- + +## 💡 Recommendations + +1. **Write tests for the top risk hotspot first** — `` in `` has a CRAP score of (complexity , % coverage). Reducing it to 80% coverage would drop the score to ~. +2. **Focus on ``** — uncovered lines, below threshold. +3. **** + +--- + +## 📁 Reports + +| Report | Path | +|--------|------| +| HTML (browsable) | `/reports/index.html` | +| Text summary | `/reports/Summary.txt` | +| GitHub markdown | `/reports/SummaryGithub.md` | +| CSV data | `/reports/Summary.csv` | +| Raw data | `/raw/` | +``` diff --git a/.agents/skills/coverage-analysis/scripts/Compute-CrapScores.ps1 b/.agents/skills/coverage-analysis/scripts/Compute-CrapScores.ps1 new file mode 100644 index 0000000000..a4b1799f01 --- /dev/null +++ b/.agents/skills/coverage-analysis/scripts/Compute-CrapScores.ps1 @@ -0,0 +1,113 @@ +# Compute-CrapScores.ps1 +# +# Reads a Cobertura XML coverage file and calculates CRAP scores per method. +# Uses Alberto Savoia's original CRAP formula: +# CRAP(m) = comp(m)^2 * (1 - cov(m))^3 + comp(m) +# +# Usage: +# .\Compute-CrapScores.ps1 -CoberturaPath ,,... [-CrapThreshold ] [-TopN ] +# +# Outputs: +# - Hotspot rows (top N by CRAP score) as a JSON array to stdout (HOTSPOTS:) +# - Summary counts as TOTAL_METHODS: and FLAGGED_METHODS: + +param( + [Parameter(Mandatory)][string[]]$CoberturaPath, + [int]$CrapThreshold = 30, + [int]$TopN = 10 +) + +# Merge methods across all Cobertura files using a stable key (Class|Method|Signature|File). +# Line hits are accumulated so a line is counted as covered if any test project covered it. +$methodMap = @{} + +foreach ($filePath in $CoberturaPath) { + if (-not (Test-Path $filePath)) { + Write-Error "Cobertura file not found: $filePath" + exit 2 + } + + try { + [xml]$cobertura = Get-Content $filePath -Encoding UTF8 -ErrorAction Stop + } catch { + Write-Error "Failed to parse Cobertura XML: $filePath. $_" + exit 2 + } + + foreach ($package in $cobertura.coverage.packages.package) { + foreach ($class in $package.classes.class) { + $className = $class.name + $fileName = $class.filename + + foreach ($method in $class.methods.method) { + $key = "$className|$($method.name)|$($method.signature)|$fileName" + + # Cyclomatic complexity is stored as an XML attribute in Cobertura format + $complexity = if ($null -ne $method.complexity) { [int]$method.complexity } else { 1 } + if ($complexity -lt 1) { $complexity = 1 } + + if (-not $methodMap.ContainsKey($key)) { + $methodMap[$key] = @{ + Class = $className + Method = $method.name + Signature = $method.signature + File = $fileName + Complexity = $complexity + LineHits = @{} + } + } + + # Accumulate hit counts per line number across files + foreach ($line in $method.lines.line) { + $lineNo = $line.number + $hits = [int]$line.hits + if ($methodMap[$key].LineHits.ContainsKey($lineNo)) { + $methodMap[$key].LineHits[$lineNo] += $hits + } else { + $methodMap[$key].LineHits[$lineNo] = $hits + } + } + } + } + } +} + +$results = [System.Collections.Generic.List[PSCustomObject]]::new() + +foreach ($entry in $methodMap.Values) { + $totalLines = $entry.LineHits.Count + $coveredLines = ($entry.LineHits.Values | Where-Object { $_ -gt 0 } | Measure-Object).Count + $lineCoverage = if ($totalLines -gt 0) { $coveredLines / $totalLines } else { 0.0 } + + $complexity = $entry.Complexity + + # Alberto Savoia's CRAP formula: comp^2 * (1 - cov)^3 + comp + # The cubic exponent on (1-cov) sharply penalizes low coverage: + # at 0% coverage the risk multiplier is 1.0; at 50% it drops to 0.125. + # Higher scores = more complex AND less covered = riskier to change + $uncovered = 1.0 - $lineCoverage + $crapScore = [Math]::Round(($complexity * $complexity * [Math]::Pow($uncovered, 3)) + $complexity, 2) + + $results.Add([PSCustomObject]@{ + Class = $entry.Class + Method = $entry.Method + Signature = $entry.Signature + File = $entry.File + TotalLines = $totalLines + CoveredLines = $coveredLines + LineCoverage = [Math]::Round($lineCoverage * 100, 1) + Complexity = $complexity + CrapScore = $crapScore + }) +} + +$hotspots = $results | Sort-Object CrapScore -Descending | Select-Object -First $TopN +$flagged = $results | Where-Object { $_.CrapScore -gt $CrapThreshold } + +Write-Host "TOTAL_METHODS:$($results.Count)" +Write-Host "FLAGGED_METHODS:$($flagged.Count)" +if ($hotspots) { + Write-Output "HOTSPOTS:$(@($hotspots) | ConvertTo-Json -Compress)" +} else { + Write-Output "HOTSPOTS:[]" +} diff --git a/.agents/skills/coverage-analysis/scripts/Extract-MethodCoverage.ps1 b/.agents/skills/coverage-analysis/scripts/Extract-MethodCoverage.ps1 new file mode 100644 index 0000000000..999a8273d1 --- /dev/null +++ b/.agents/skills/coverage-analysis/scripts/Extract-MethodCoverage.ps1 @@ -0,0 +1,193 @@ +param( + [Parameter(Mandatory=$true)] + [string[]]$CoberturaPath, + + [Parameter(Mandatory=$false)] + [int]$CoverageThreshold = 80, + + [Parameter(Mandatory=$false)] + [int]$BranchThreshold = 70, + + [Parameter(Mandatory=$false)] + [ValidateSet('uncovered', 'below-threshold', 'all')] + [string]$Filter = 'all' +) + +<# +.SYNOPSIS +Extract method-level coverage from Cobertura XML and output as JSON. + +.DESCRIPTION +Parses one or more Cobertura code coverage XML files and extracts per-method coverage metrics: +- Method name and class +- Line coverage percentage +- Branch coverage percentage +- Lines covered / total +- Branches covered / total +- Complexity (if available) + +When multiple files are provided, line hits are merged across files so a line is counted +as covered if any test project covered it. + +Filters by coverage status (uncovered, below threshold, or all). +Output is JSON for easy post-processing into tables, CSV, or other formats. + +.PARAMETER CoberturaPath +Path(s) to Cobertura coverage.cobertura.xml file(s). Accepts multiple paths for multi-test-project merging. + +.PARAMETER CoverageThreshold +Minimum acceptable line coverage percentage. Methods below this threshold are flagged (default: 80). + +.PARAMETER BranchThreshold +Minimum acceptable branch coverage percentage for methods that contain branches (default: 70). + +.PARAMETER Filter +Which methods to include: + 'uncovered' - methods with 0% coverage only + 'below-threshold' - methods with line coverage < CoverageThreshold OR branch coverage < BranchThreshold (for methods with branches) + 'all' - all methods (default) + +.EXAMPLE +PS> & .\Extract-MethodCoverage.ps1 -CoberturaPath "coverage.cobertura.xml" -CoverageThreshold 80 -BranchThreshold 70 -Filter uncovered +Outputs a JSON array of uncovered methods. + +.EXAMPLE +PS> & .\Extract-MethodCoverage.ps1 -CoberturaPath @("tests1/coverage.cobertura.xml","tests2/coverage.cobertura.xml") +Merges coverage from multiple test projects and outputs combined method-level metrics. + +.OUTPUTS +Writes JSON array to stdout. +Sets exit code 0 on success, 2 on missing/invalid file. +#> + +foreach ($p in $CoberturaPath) { + if (-not (Test-Path $p)) { + Write-Error "Cobertura file not found: $p" + exit 2 + } +} + +# Merge methods across all Cobertura files using a stable key (Class|Method|Signature|File). +# Line hits and branch data are accumulated so coverage reflects all test projects. +$methodMap = @{} + +foreach ($p in $CoberturaPath) { + try { + [xml]$xml = Get-Content $p -Encoding UTF8 -ErrorAction Stop + } catch { + Write-Error "Failed to parse Cobertura XML: $_" + exit 2 + } + + foreach ($package in $xml.coverage.packages.package) { + foreach ($class in $package.classes.class) { + $className = $class.name + $classFilename = $class.filename + + foreach ($method in $class.methods.method) { + $key = "$className|$($method.name)|$($method.signature)|$classFilename" + + if (-not $methodMap.ContainsKey($key)) { + $complexity = if ($null -ne $method.complexity) { [int]$method.complexity } else { 1 } + if ($complexity -lt 1) { $complexity = 1 } + $methodMap[$key] = @{ + Class = $className + Method = $method.name + Signature = $method.signature + File = $classFilename + Complexity = $complexity + LineHits = @{} + BranchData = @{} + } + } + + # Accumulate line hits across files + foreach ($line in $method.lines.line) { + $lineNo = $line.number + $hits = [int]$line.hits + if ($methodMap[$key].LineHits.ContainsKey($lineNo)) { + $methodMap[$key].LineHits[$lineNo] += $hits + } else { + $methodMap[$key].LineHits[$lineNo] = $hits + } + + # Accumulate branch data + if ($line.branch -eq 'true' -and $line.'condition-coverage') { + if ($line.'condition-coverage' -match '\((\d+)/(\d+)\)') { + $covered = [int]$Matches[1] + $total = [int]$Matches[2] + if ($methodMap[$key].BranchData.ContainsKey($lineNo)) { + # Merge branch coverage across files by accumulating covered branches (capped at total) + $existingCovered = $methodMap[$key].BranchData[$lineNo].Covered + $existingTotal = $methodMap[$key].BranchData[$lineNo].Total + if ($existingTotal -ne $total) { + Write-Warning ("Branch total mismatch for {0} at line {1}: {2} vs {3}" -f $key, $lineNo, $existingTotal, $total) + } + $mergedTotal = [Math]::Max($existingTotal, $total) + $mergedCovered = [Math]::Min($existingCovered + $covered, $mergedTotal) + $methodMap[$key].BranchData[$lineNo] = @{ Covered = $mergedCovered; Total = $mergedTotal } + } else { + $methodMap[$key].BranchData[$lineNo] = @{ Covered = $covered; Total = $total } + } + } + } + } + } + } + } +} + +$methods = [System.Collections.Generic.List[PSCustomObject]]::new() + +foreach ($entry in $methodMap.Values) { + $totalLines = $entry.LineHits.Count + $coveredLineCount = ($entry.LineHits.Values | Where-Object { $_ -gt 0 } | Measure-Object).Count + $lineCoveragePercent = if ($totalLines -gt 0) { [math]::Round(($coveredLineCount / $totalLines) * 100, 1) } else { 0 } + + $branchesTotal = 0 + $branchesCovered = 0 + foreach ($bd in $entry.BranchData.Values) { + $branchesCovered += $bd.Covered + $branchesTotal += $bd.Total + } + $branchCoveragePercent = if ($branchesTotal -gt 0) { [math]::Round(($branchesCovered / $branchesTotal) * 100, 1) } else { 0 } + + # Apply filter + if ($Filter -eq 'uncovered' -and $lineCoveragePercent -gt 0) { continue } + if ($Filter -eq 'below-threshold') { + $lineOk = $lineCoveragePercent -ge $CoverageThreshold + $branchOk = ($branchesTotal -eq 0) -or ($branchCoveragePercent -ge $BranchThreshold) + if ($lineOk -and $branchOk) { continue } + } + + $methods.Add([PSCustomObject]@{ + Class = $entry.Class + Method = $entry.Method + Signature = $entry.Signature + File = $entry.File + Complexity = $entry.Complexity + LineCoverage = $lineCoveragePercent + BranchCoverage = $branchCoveragePercent + CoveredLines = $coveredLineCount + TotalLines = $totalLines + UncoveredLines = ($totalLines - $coveredLineCount) + CoveredBranches = $branchesCovered + TotalBranches = $branchesTotal + }) +} +# Sort by uncovered lines descending, then by line coverage ascending +$sorted = $methods | Sort-Object -Property @{Expression='UncoveredLines';Descending=$true}, @{Expression='LineCoverage';Descending=$false}, Class, Method + +# Output as JSON (empty array guard for zero results) +if ($sorted.Count -eq 0) { + Write-Output "[]" +} else { + $json = @($sorted) | ConvertTo-Json + Write-Output $json +} + +# Summary +Write-Host "METHODS_FILTERED:$($methods.Count)" -ForegroundColor Green +$uncovered = $methods | Where-Object { $_.LineCoverage -eq 0 } | Measure-Object | Select-Object -ExpandProperty Count +Write-Host "UNCOVERED_METHODS:$uncovered" -ForegroundColor $(if ($uncovered -gt 0) { 'Yellow' } else { 'Green' }) +exit 0 diff --git a/.agents/skills/crap-score/SKILL.md b/.agents/skills/crap-score/SKILL.md new file mode 100644 index 0000000000..028f783d17 --- /dev/null +++ b/.agents/skills/crap-score/SKILL.md @@ -0,0 +1,155 @@ +--- +name: crap-score +description: > + Calculates CRAP (Change Risk Anti-Patterns) score for .NET methods, classes, + or files. Use when the user asks to assess test quality, identify risky + untested code, compute CRAP scores, or evaluate whether complex methods have + sufficient test coverage. Requires code coverage data (Cobertura XML) and + cyclomatic complexity analysis. + DO NOT USE FOR: writing tests, general test execution unrelated to coverage/CRAP + analysis, or general code coverage reporting without CRAP context. +--- + +# CRAP Score Analysis + +Calculate CRAP (Change Risk Anti-Patterns) scores for .NET methods to identify code that is both complex and undertested. + +## Background + +The CRAP score combines **cyclomatic complexity** and **code coverage** into a single metric: + +$$\text{CRAP}(m) = \text{comp}(m)^2 \times (1 - \text{cov}(m))^3 + \text{comp}(m)$$ + +Where: + +- $\text{comp}(m)$ = cyclomatic complexity of method $m$ +- $\text{cov}(m)$ = code coverage ratio (0.0 to 1.0) of method $m$ + +| CRAP Score | Risk Level | Interpretation | +|------------|------------|----------------| +| < 5 | Low | Simple and well-tested | +| 5-15 | Moderate | Acceptable for most code | +| 15-30 | High | Needs more tests or simplification | +| > 30 | Critical | Refactor and add coverage urgently | + +A method with 100% coverage has CRAP = complexity (the minimum). A method with 0% coverage has CRAP = complexity^2 + complexity. + +## When to Use + +- User wants to assess which methods are risky due to low coverage and high complexity +- User asks for CRAP score of specific methods, classes, or files +- User wants to prioritize which code to test next +- User wants to evaluate test quality beyond simple coverage percentages + +## When Not to Use + +- User just wants to run tests (use `run-tests` skill) +- User wants to write new tests (use `writing-mstest-tests` skill or general coding assistance) +- User only wants a coverage percentage without complexity analysis + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Target scope | Yes | Method name, class name, or file path to analyze | +| Test project path | No | Path to the test project. Defaults to discovering test projects in the solution. | +| Source project path | No | Path to the source project under analysis | + +## Workflow + +### Step 1: Collect code coverage data + +If no coverage data exists yet (no Cobertura XML available), **always run `dotnet test` with coverage collection first** and mention the exact command in your response. Do not skip this step -- CRAP scores require coverage data. + +Check the test project's `.csproj` for the coverage package, then run the appropriate command: + +| Coverage Package | Command | Output Location | +|---|---|---| +| `coverlet.collector` | `dotnet test --collect:"XPlat Code Coverage" --results-directory ./TestResults` | Typically under `TestResults//coverage.cobertura.xml`. Search recursively under the results directory (for example, `TestResults/**/coverage.cobertura.xml`) or use any explicit coverage path the user provides. | +| `Microsoft.Testing.Extensions.CodeCoverage` (.NET 9) | `dotnet test -- --coverage --coverage-output-format cobertura --coverage-output ./TestResults` | `--coverage-output` path | +| `Microsoft.Testing.Extensions.CodeCoverage` (.NET 10+) | `dotnet test --coverage --coverage-output-format cobertura --coverage-output ./TestResults` | `--coverage-output` path | + +### Step 2: Compute cyclomatic complexity + +Analyze the target source files to determine cyclomatic complexity per method. Count the following decision points (each adds 1 to the base complexity of 1): + +| Construct | Example | +|-----------|---------| +| `if` | `if (x > 0)` | +| `else if` | `else if (y < 0)` | +| `case` (each) | `case 1:` | +| `for` | `for (int i = 0; ...)` | +| `foreach` | `foreach (var item in list)` | +| `while` | `while (running)` | +| `do...while` | `do { } while (cond)` | +| `catch` (each) | `catch (Exception ex)` | +| `&&` | `if (a && b)` | +| `\|\|` (OR) | `if (a \|\| b)` | +| `??` | `value ?? fallback` | +| `?.` | `obj?.Method()` | +| `? :` (ternary) | `x > 0 ? a : b` | +| Pattern match arm | `x is > 0 and < 10` | + +Base complexity is 1 for every method. Each decision point adds 1. + +When analyzing, read the source file and count these constructs per method. Report the breakdown. + +### Step 3: Extract per-method coverage from Cobertura XML + +Parse the Cobertura XML to find each method's `line-rate` attribute under the target `` element. If `line-rate` is not available at method level, compute it from the `` elements: + +$$\text{cov}(m) = \frac{\text{lines with hits} > 0}{\text{total lines}}$$ + +Method names in Cobertura may differ from source (async methods, lambdas). Match by line ranges when names don't align. + +### Step 4: Calculate CRAP scores + +For each method in scope, apply the formula: + +$$\text{CRAP}(m) = \text{comp}(m)^2 \times (1 - \text{cov}(m))^3 + \text{comp}(m)$$ + +### Step 5: Present results + +Present a sorted table (highest CRAP first): + +```text +| Method | Complexity | Coverage | CRAP Score | Risk | +|---------------------------------|------------|----------|------------|----------| +| OrderService.ProcessOrder | 12 | 45% | 28.4 | High | +| OrderService.ValidateItems | 8 | 90% | 8.1 | Moderate | +| OrderService.CalculateTotal | 3 | 100% | 3.0 | Low | +``` + +Include: + +- **Summary**: total methods analyzed, how many in each risk category +- **Top offenders**: methods with CRAP > 30, with specific recommendations +- **Quick wins**: methods with high complexity but where small coverage improvements would drop the score significantly + +### Step 6: Provide actionable recommendations + +For high-CRAP methods, suggest one or both: + +1. **Add tests** -- identify uncovered branches and suggest specific test cases +2. **Reduce complexity** -- suggest extract-method refactoring for deeply nested logic + +Calculate the **coverage needed** to bring a method below a CRAP threshold of 15: + +$$\text{cov}_{\text{needed}} = 1 - \left(\frac{15 - \text{comp}}{\text{comp}^2}\right)^{1/3}$$ + +This formula only applies when comp < 15. When comp >= 15, the minimum possible CRAP score (at 100% coverage) is comp itself, which already meets or exceeds the threshold. In that case, **coverage alone cannot bring the CRAP score below the threshold** -- the method must be refactored to reduce its cyclomatic complexity first. + +Report this as: "To bring `ProcessOrder` (complexity 12) below CRAP 15, increase coverage from 45% to at least 72%." For methods where complexity alone exceeds the threshold, report: "`ComplexMethod` (complexity 18) cannot reach CRAP < 15 through testing alone -- reduce complexity by extracting sub-methods." + +## Validation + +- Verify that coverage data was collected successfully (Cobertura XML exists and contains data) +- Cross-check that method names in coverage data match the source code +- Confirm CRAP scores by spot-checking the formula on one method manually +- Ensure a 100%-covered method's CRAP equals its complexity exactly + +## Common Pitfalls + +- **Stale coverage data**: Always regenerate coverage before computing CRAP scores. Old coverage files will produce misleading results. +- **Method name mismatches**: Cobertura XML may use mangled/compiler-generated names for async methods, lambdas, or local functions. Match by line ranges when names don't align. +- **Generated code**: Exclude auto-generated files (e.g., `*.Designer.cs`, `*.g.cs`) from analysis unless explicitly requested. diff --git a/.agents/skills/detect-static-dependencies/SKILL.md b/.agents/skills/detect-static-dependencies/SKILL.md new file mode 100644 index 0000000000..55638a770b --- /dev/null +++ b/.agents/skills/detect-static-dependencies/SKILL.md @@ -0,0 +1,142 @@ +--- +name: detect-static-dependencies +description: > + Scan C# source files for hard-to-test static dependencies — DateTime.Now/UtcNow, + File.*, Directory.*, Environment.*, HttpClient, Console.*, Process.*, and other + untestable statics. Produces a ranked report of static call sites by frequency. + USE FOR: find untestable statics, scan for static dependencies, testability audit, + identify hard-to-mock code, find DateTime.Now usage, detect static coupling, + testability report, static analysis for testability. + DO NOT USE FOR: generating wrappers (use generate-testability-wrappers), + migrating code (use migrate-static-to-wrapper), general code review, + or finding statics that are already behind abstractions. +--- + +# Detect Static Dependencies + +Scan a C# codebase for calls to hard-to-test static APIs and produce a ranked report showing which statics appear most frequently, which files are most affected, and which abstractions already exist in the .NET ecosystem to replace them. + +## When to Use + +- Auditing a project's testability before adding unit tests +- Understanding the scope of static coupling in a legacy codebase +- Prioritizing which statics to wrap first (highest-frequency wins) +- Creating a migration plan for incremental testability improvements + +## When Not to Use + +- The user wants wrappers generated (hand off to `generate-testability-wrappers`) +- The user wants mechanical migration done (hand off to `migrate-static-to-wrapper`) +- The statics are already behind interfaces or `TimeProvider` +- The code is not C# / .NET + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Target path | Yes | A file, directory, project (.csproj), or solution (.sln) to scan | +| Exclusion patterns | No | Glob patterns to skip (e.g., `**/obj/**`, `**/Migrations/**`) | +| Category filter | No | Limit to specific categories: `time`, `filesystem`, `environment`, `network`, `console`, `process` | + +## Workflow + +### Step 1: Determine scan scope + +Resolve the target to a set of `.cs` files: +- If a `.cs` file, scan that single file. +- If a directory, scan all `.cs` files recursively (excluding `obj/`, `bin/`). +- If a `.csproj`, find its directory and scan `.cs` files within. +- If a `.sln`, parse it, find all project directories, and scan `.cs` files across all projects. + +Always exclude `obj/`, `bin/`, and any user-specified exclusion patterns. + +### Step 2: Search for static dependency patterns + +Scan each file for calls matching these categories: + +| Category | Patterns to search for | Recommended replacement | +|----------|----------------------|------------------------| +| **Time** | `DateTime.Now`, `DateTime.UtcNow`, `DateTime.Today`, `DateTimeOffset.Now`, `DateTimeOffset.UtcNow`, `Task.Delay(`, `new CancellationTokenSource(TimeSpan` | `TimeProvider` (.NET 8+) | +| **File System** | `File.ReadAllText(`, `File.WriteAllText(`, `File.Exists(`, `File.Delete(`, `File.Copy(`, `File.Move(`, `Directory.Exists(`, `Directory.CreateDirectory(`, `Directory.GetFiles(`, `Directory.Delete(`, `Path.Combine(`, `Path.GetTempPath(` | `IFileSystem` (System.IO.Abstractions NuGet) | +| **Environment** | `Environment.GetEnvironmentVariable(`, `Environment.SetEnvironmentVariable(`, `Environment.MachineName`, `Environment.UserName`, `Environment.CurrentDirectory`, `Environment.Exit(` | Custom `IEnvironmentProvider` | +| **Network** | `new HttpClient(`, `HttpClient.GetAsync(`, `HttpClient.PostAsync(`, `HttpClient.SendAsync(` | `IHttpClientFactory` (built-in) | +| **Console** | `Console.WriteLine(`, `Console.ReadLine(`, `Console.Write(`, `Console.ReadKey(` | `IConsole` wrapper or `ILogger` | +| **Process** | `Process.Start(`, `Process.GetCurrentProcess(`, `Process.GetProcessesByName(` | Custom `IProcessRunner` | + +### Step 3: Aggregate and rank results + +Count each static call pattern across the entire scan scope. Produce a summary with: + +1. **Category summary** — total call sites per category (time, filesystem, env, etc.) +2. **Top patterns** — the 10 most frequent individual patterns ranked by count +3. **Most affected files** — files with the highest number of static dependencies +4. **Existing abstractions available** — for each category, note the recommended .NET abstraction: + - Time → `TimeProvider` (built-in since .NET 8) + - File system → `System.IO.Abstractions` (NuGet package) + - HTTP → `IHttpClientFactory` (built-in) + - Environment → custom `IEnvironmentProvider` + - Console → custom `IConsole` or `ILogger` + - Process → custom `IProcessRunner` + +### Step 4: Present the report + +Format the output as a structured report: + +``` +## Static Dependency Report + +**Scope**: +**Files scanned**: +**Total static call sites**: + +### Category Summary +| Category | Call Sites | Recommended Abstraction | +|-------------|-----------|------------------------| +| Time | 42 | TimeProvider (.NET 8+) | +| File System | 31 | System.IO.Abstractions | +| Environment | 12 | IEnvironmentProvider | +| ... | ... | ... | + +### Top 10 Patterns +| # | Pattern | Count | Files | +|---|---------------------|-------|-------| +| 1 | DateTime.UtcNow | 28 | 14 | +| 2 | File.ReadAllText | 18 | 9 | +| ... | + +### Most Affected Files +| File | Static Calls | Categories | +|-------------------------------|-------------|---------------------| +| Services/OrderProcessor.cs | 12 | Time, FileSystem | +| ... | + +### Migration Priority +1. **Time** (42 sites) — Use `TimeProvider`, zero NuGet dependencies on .NET 8+ +2. **File System** (31 sites) — Use `System.IO.Abstractions` NuGet package +3. ... +``` + +### Step 5: Suggest next steps + +Based on the report, recommend: +- Which category to tackle first (fewest dependencies, best built-in support) +- Whether to use `generate-testability-wrappers` for custom wrapper generation +- Whether to use `migrate-static-to-wrapper` for mechanical bulk migration + +## Validation + +- [ ] All `.cs` files in scope were scanned (check count) +- [ ] Report includes category totals, top patterns, and affected files +- [ ] Each detected pattern has a recommended replacement listed +- [ ] `obj/` and `bin/` directories were excluded +- [ ] Migration priority is ordered by impact (count × ease of replacement) + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Scanning `obj/` or generated code | Always exclude `obj/`, `bin/`, and `*.Designer.cs` | +| Counting wrapped calls as statics | Check if the call is behind an interface or injected service before counting | +| Missing statics inside lambdas/LINQ | Search covers all code within `.cs` files, including lambdas | +| Recommending `TimeProvider` on < .NET 8 | Check `TargetFramework` in `.csproj` — if < net8.0, recommend `NodaTime.IClock` or custom `ISystemClock` | +| Ignoring test projects | Only scan production code — exclude `*.Tests.csproj` projects from the scan | diff --git a/.agents/skills/directory-build-organization/SKILL.md b/.agents/skills/directory-build-organization/SKILL.md new file mode 100644 index 0000000000..1d767614d0 --- /dev/null +++ b/.agents/skills/directory-build-organization/SKILL.md @@ -0,0 +1,175 @@ +--- +name: directory-build-organization +description: "Guide for organizing MSBuild infrastructure with Directory.Build.props, Directory.Build.targets, Directory.Packages.props, and Directory.Build.rsp. Only activate in MSBuild/.NET build context. USE FOR: structuring multi-project repos, centralizing build settings, implementing NuGet Central Package Management (CPM) with ManagePackageVersionsCentrally, consolidating duplicated properties across .csproj files, setting up multi-level Directory.Build hierarchy with GetPathOfFileAbove, understanding evaluation order (Directory.Build.props → SDK .props → .csproj → SDK .targets → Directory.Build.targets). Critical pitfall: $(TargetFramework) conditions in .props silently fail for single-targeting projects — must use .targets. DO NOT USE FOR: non-MSBuild build systems, migrating legacy projects to SDK-style (use msbuild-modernization), single-project solutions with no shared settings. INVOKES: no tools — pure knowledge skill." +--- + +# Organizing Build Infrastructure with Directory.Build Files + +## Directory.Build.props vs Directory.Build.targets + +Understanding which file to use is critical. They differ in **when** they are imported during evaluation: + +**Evaluation order:** + +``` +Directory.Build.props → SDK .props → YourProject.csproj → SDK .targets → Directory.Build.targets +``` + +| Use `.props` for | Use `.targets` for | +|---|---| +| Setting property defaults | Custom build targets | +| Common item definitions | Late-bound property overrides | +| Properties projects can override | Post-build steps | +| Assembly/package metadata | Conditional logic on final values | +| Analyzer PackageReferences | Targets that depend on SDK-defined properties | + +**Rule of thumb:** Properties and items go in `.props`. Custom targets and late-bound logic go in `.targets`. + +Because `.props` is imported before the project file, the project can override any value set there. Because `.targets` is imported after everything, it gets the final say—but projects cannot override `.targets` values. + +### ⚠️ Critical: TargetFramework Availability in .props vs .targets + +**Property conditions on `$(TargetFramework)` in `.props` files silently fail for single-targeting projects** — the property is empty during `.props` evaluation. Move TFM-conditional properties to `.targets` instead. ItemGroup and Target conditions are not affected. + +See [targetframework-props-pitfall.md](references/targetframework-props-pitfall.md) for the full explanation. + +## Directory.Build.props + +Good candidates: language settings, assembly/package metadata, build warnings, code analysis, common analyzers. + +```xml + + + latest + enable + enable + true + true + Contoso + Contoso Engineering + + +``` + +**Do NOT put here:** project-specific TFMs, project-specific PackageReferences, targets/build logic, or properties depending on SDK-defined values (not available during `.props` evaluation). + +## Directory.Build.targets + +Good candidates: custom build targets, late-bound property overrides (values depending on SDK properties), post-build validation. + +```xml + + + + + + + + $(OutputPath)$(AssemblyName).xml + + +``` + +## Directory.Packages.props (Central Package Management) + +Central Package Management (CPM) provides a single source of truth for all NuGet package versions. See [https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management](https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management) for details. + +**Enable CPM in `Directory.Packages.props` at the repo root:** + +```xml + + + true + + + + + + + + + + + + + + + +``` + +## Directory.Build.rsp + +Contains default MSBuild CLI arguments applied to all builds under the directory tree. + +**Example `Directory.Build.rsp`:** + +``` +/maxcpucount +/nodeReuse:false +/consoleLoggerParameters:Summary;ForceNoAlign +/warnAsMessage:MSB3277 +``` + +- Works with both `msbuild` and `dotnet` CLI in modern .NET versions +- Great for enforcing consistent CI and local build flags +- Each argument goes on its own line + +## Multi-level Directory.Build Files + +MSBuild only auto-imports the **first** `Directory.Build.props` (or `.targets`) it finds walking up from the project directory. To chain multiple levels, explicitly import the parent at the **top** of the inner file. See [multi-level-examples](references/multi-level-examples.md) for full file examples. + +```xml + + + + + +``` + +**Example layout:** + +``` +repo/ + Directory.Build.props ← repo-wide (lang version, company info, analyzers) + Directory.Build.targets ← repo-wide targets + Directory.Packages.props ← central package versions + src/ + Directory.Build.props ← src-specific (imports repo-level, sets IsPackable=true) + test/ + Directory.Build.props ← test-specific (imports repo-level, sets IsPackable=false, adds test packages) +``` + +## Artifact Output Layout (.NET 8+) + +Set `$(MSBuildThisFileDirectory)artifacts` in `Directory.Build.props` to automatically produce project-name-separated `bin/`, `obj/`, and `publish/` directories under a single `artifacts/` folder, avoiding bin/obj clashes by default. See [common-patterns](references/common-patterns.md) for the directory layout and additional patterns (conditional settings by project type, post-pack validation). + +## Workflow: Organizing Build Infrastructure + +1. **Audit all `.csproj` files** — Catalog every ``, ``, and custom `` across the solution. Note which settings repeat and which are project-specific. +2. **Create root `Directory.Build.props`** — Move shared property defaults (LangVersion, Nullable, TreatWarningsAsErrors, metadata) here. These are imported before the project file so projects can override them. +3. **Create root `Directory.Build.targets`** — Move custom build targets, post-build validation, and any properties that depend on SDK-defined values (e.g., `OutputPath`, `TargetFramework` for single-targeting projects) here. These are imported after the SDK so all properties are available. +4. **Create `Directory.Packages.props`** — Enable Central Package Management (`ManagePackageVersionsCentrally`), list all `PackageVersion` entries, and remove `Version=` from `PackageReference` items in `.csproj` files. +5. **Set up multi-level hierarchy** — Create inner `Directory.Build.props` files for `src/` and `test/` folders with distinct settings. Use `GetPathOfFileAbove` to chain to the parent. +6. **Simplify `.csproj` files** — Remove all centralized properties, version attributes, and duplicated targets. Each project should only contain what is unique to it. +7. **Validate** — Run `dotnet restore && dotnet build` and verify no regressions. Use `dotnet msbuild -pp:output.xml` to inspect the final merged view if needed. + +## Troubleshooting + +| Problem | Cause | Fix | +|---|---|---| +| `Directory.Build.props` isn't picked up | File name casing wrong (exact match required on Linux/macOS) | Verify exact casing: `Directory.Build.props` (capital D, B) | +| Properties from `.props` are ignored by projects | Project sets the same property after the import | Move the property to `Directory.Build.targets` to set it after the project | +| Multi-level import doesn't work | Missing `GetPathOfFileAbove` import in inner file | Add the `` element at the top of the inner file (see Multi-level section) | +| Properties using SDK values are empty in `.props` | SDK properties aren't defined yet during `.props` evaluation | Move to `.targets` which is imported after the SDK | +| `Directory.Packages.props` not found | File not at repo root or not named exactly | Must be named `Directory.Packages.props` and at or above the project directory | +| Property condition on `$(TargetFramework)` doesn't match in `.props` | `TargetFramework` isn't set yet for single-targeting projects during `.props` evaluation | Move property to `.targets`, or use ItemGroup/Target conditions instead (which evaluate late) | + +**Diagnosis:** Use the preprocessed project output to see all imports and final property values: + +```bash +dotnet msbuild -pp:output.xml MyProject.csproj +``` + +This expands all imports inline so you can see exactly where each property is set and what the final evaluated value is. diff --git a/.agents/skills/directory-build-organization/references/common-patterns.md b/.agents/skills/directory-build-organization/references/common-patterns.md new file mode 100644 index 0000000000..1b86b4cfe8 --- /dev/null +++ b/.agents/skills/directory-build-organization/references/common-patterns.md @@ -0,0 +1,56 @@ +# Common Directory.Build Patterns + +## Conditional Settings by Project Type + +Detect test projects by naming convention in `Directory.Build.props`: + +```xml + + false + true + +``` + +Use `Directory.Build.targets` for conditions on SDK-defined properties like `OutputType`: + +```xml + + false + + + + true + +``` + +## Post-Build Validation + +Validate that `Pack` produced the expected output: + +```xml + + + +``` + +## Artifact Output Layout (.NET 8+) + +Setting `ArtifactsPath` in `Directory.Build.props` produces this structure: + +``` +artifacts/ + bin/ + MyLib/ + debug/ + release/ + MyApp/ + debug/ + release/ + obj/ + MyLib/ + MyApp/ + publish/ + MyApp/ +``` diff --git a/.agents/skills/directory-build-organization/references/multi-level-examples.md b/.agents/skills/directory-build-organization/references/multi-level-examples.md new file mode 100644 index 0000000000..e8ac22f015 --- /dev/null +++ b/.agents/skills/directory-build-organization/references/multi-level-examples.md @@ -0,0 +1,164 @@ +# Multi-level Directory.Build Examples + +Full file examples for a typical multi-level repo layout. + +## Repo-level `Directory.Build.props` + +```xml + + + + latest + enable + true + + + +``` + +## `src/Directory.Build.props` + +```xml + + + + + + true + true + + + +``` + +## `test/Directory.Build.props` + +```xml + + + + + + false + $(NoWarn);CS1591 + + + + + + + + + + +``` + +## Before/After: Centralizing Duplicated Settings + +**Before — duplicated settings in every .csproj:** + +```xml + + + + + net8.0 + latest + enable + enable + true + Contoso + Contoso Engineering + + + + + + + + + + + + + + net8.0 + latest + enable + enable + true + Contoso + Contoso Engineering + + + + + + + + +``` + +**After — centralized with Directory.Build files:** + +```xml + + + + + latest + enable + enable + true + Contoso + Contoso Engineering + + + + + + + + + true + + + + + + + + + + + + + + + + + + net8.0 + + + + + + + + + + + + + net8.0 + + + + + + + +``` diff --git a/.agents/skills/directory-build-organization/references/targetframework-props-pitfall.md b/.agents/skills/directory-build-organization/references/targetframework-props-pitfall.md new file mode 100644 index 0000000000..c9eeabc252 --- /dev/null +++ b/.agents/skills/directory-build-organization/references/targetframework-props-pitfall.md @@ -0,0 +1,54 @@ +# AP-21: Property Conditioned on TargetFramework in .props Files + +**Smell**: `` or `` in `Directory.Build.props` or any `.props` file imported before the project body. + +**Why it's bad**: `$(TargetFramework)` is NOT reliably available in `Directory.Build.props` or any `.props` file imported before the project body. It is only set that early for multi-targeting projects, which receive `TargetFramework` as a global property from the outer build. Single-targeting projects (using singular ``) set it in the project body, which is evaluated *after* `.props`. This means property conditions on `$(TargetFramework)` in `.props` files silently fail for single-targeting projects — the condition never matches because the property is empty. This applies to both `` and individual `` elements. + +For a detailed explanation of MSBuild's evaluation and execution phases, see [Build process overview](https://learn.microsoft.com/en-us/visualstudio/msbuild/build-process-overview). + +```xml + + + $(DefineConstants);MY_FEATURE + + + + + $(DefineConstants);MY_FEATURE + + + + + $(DefineConstants);MY_FEATURE + + + + + + $(DefineConstants);MY_FEATURE + +``` + +**⚠️ Item and Target conditions are NOT affected.** This restriction applies ONLY to property conditions (`` and ``). Item conditions (``) and Target conditions in `.props` files are SAFE because items and targets evaluate after all properties (including those set in the project body) have been evaluated. This includes `PackageVersion` items in `Directory.Packages.props`, `PackageReference` items in `Directory.Build.props`, and any other item types. + +**Do NOT flag the following patterns — they are correct:** + +```xml + + + + + + + + + + + + + + + + + +``` diff --git a/.agents/skills/dotnet-test-frameworks/SKILL.md b/.agents/skills/dotnet-test-frameworks/SKILL.md new file mode 100644 index 0000000000..2e4887291e --- /dev/null +++ b/.agents/skills/dotnet-test-frameworks/SKILL.md @@ -0,0 +1,117 @@ +--- +name: dotnet-test-frameworks +description: "Reference data for .NET test framework detection patterns, assertion APIs, skip annotations, setup/teardown methods, and common test smell indicators across MSTest, xUnit, NUnit, and TUnit. DO NOT USE directly — loaded by test analysis skills (test-anti-patterns, exp-test-smell-detection, exp-assertion-quality, exp-test-maintainability, exp-test-tagging) when they need framework-specific lookup tables." +user-invocable: false +--- + +# .NET Test Framework Reference + +Language-specific detection patterns for .NET test frameworks (MSTest, xUnit, NUnit, TUnit). + +## Test File Identification + +| Framework | Test class markers | Test method markers | +| --------- | ------------------ | ------------------- | +| MSTest | `[TestClass]` | `[TestMethod]`, `[DataTestMethod]` | +| xUnit | *(none — convention-based)* | `[Fact]`, `[Theory]` | +| NUnit | `[TestFixture]` | `[Test]`, `[TestCase]`, `[TestCaseSource]` | +| TUnit | `[ClassDataSource]` | `[Test]` | + +## Assertion APIs by Framework + +| Category | MSTest | xUnit | NUnit | +| -------- | ------ | ----- | ----- | +| Equality | `Assert.AreEqual` | `Assert.Equal` | `Assert.That(x, Is.EqualTo(y))` | +| Boolean | `Assert.IsTrue` / `Assert.IsFalse` | `Assert.True` / `Assert.False` | `Assert.That(x, Is.True)` | +| Null | `Assert.IsNull` / `Assert.IsNotNull` | `Assert.Null` / `Assert.NotNull` | `Assert.That(x, Is.Null)` | +| Exception | `Assert.Throws()` / `Assert.ThrowsExactly()` | `Assert.Throws()` | `Assert.That(() => ..., Throws.TypeOf())` | +| Collection | `CollectionAssert.Contains` | `Assert.Contains` | `Assert.That(col, Has.Member(x))` | +| String | `StringAssert.Contains` | `Assert.Contains(str, sub)` | `Assert.That(str, Does.Contain(sub))` | +| Type | `Assert.IsInstanceOfType` | `Assert.IsAssignableFrom` | `Assert.That(x, Is.InstanceOf())` | +| Inconclusive | `Assert.Inconclusive()` | *skip via `[Fact(Skip)]`* | `Assert.Inconclusive()` | +| Fail | `Assert.Fail()` | `Assert.Fail()` (.NET 10+) | `Assert.Fail()` | + +Third-party assertion libraries: `Should*` (Shouldly), `.Should()` (FluentAssertions / AwesomeAssertions), `Verify()` (Verify). + +## Sleep/Delay Patterns + +| Pattern | Example | +| ------- | ------- | +| Thread sleep | `Thread.Sleep(2000)` | +| Task delay | `await Task.Delay(1000)` | +| SpinWait | `SpinWait.SpinUntil(() => condition, timeout)` | + +## Skip/Ignore Annotations + +| Framework | Annotation | With reason | +| --------- | ---------- | ----------- | +| MSTest | `[Ignore]` | `[Ignore("reason")]` | +| xUnit | `[Fact(Skip = "reason")]` | *(reason is required)* | +| NUnit | `[Ignore("reason")]` | *(reason is required)* | +| TUnit | `[Skip("reason")]` | *(reason is required)* | +| Conditional | `#if false` / `#if NEVER` | *(no reason possible)* | + +## Exception Handling — Idiomatic Alternatives + +When a test uses `try`/`catch` to verify exceptions, suggest the framework-native alternative: + +**MSTest:** + +```csharp +// Instead of try/catch (matches exact type): +var ex = Assert.ThrowsExactly( + () => processor.ProcessOrder(emptyOrder)); +Assert.AreEqual("Order must contain at least one item", ex.Message); + +// Or (also matches derived types): +var ex = Assert.Throws( + () => processor.ProcessOrder(emptyOrder)); +Assert.AreEqual("Order must contain at least one item", ex.Message); +``` + +**xUnit:** + +```csharp +var ex = Assert.Throws( + () => processor.ProcessOrder(emptyOrder)); +Assert.Equal("Order must contain at least one item", ex.Message); +``` + +**NUnit:** + +```csharp +var ex = Assert.Throws( + () => processor.ProcessOrder(emptyOrder)); +Assert.That(ex.Message, Is.EqualTo("Order must contain at least one item")); +``` + +## Mystery Guest — Common .NET Patterns + +| Smell indicator | What to look for | +| --------------- | ---------------- | +| File system | `File.ReadAllText`, `File.Exists`, `File.WriteAllBytes`, `Directory.GetFiles`, `Path.Combine` with hard-coded paths | +| Database | `SqlConnection`, `DbContext` (without in-memory provider), `SqlCommand` | +| Network | `HttpClient` without `HttpMessageHandler` override, `WebRequest`, `TcpClient` | +| Environment | `Environment.GetEnvironmentVariable`, `Environment.CurrentDirectory` | +| Acceptable | `MemoryStream`, `StringReader`, `InMemory` database providers, custom `DelegatingHandler` | + +## Integration Test Markers + +Recognize these as integration tests (adjust smell severity accordingly): + +- Class name contains `Integration`, `E2E`, `EndToEnd`, or `Acceptance` +- `[TestCategory("Integration")]` (MSTest) +- `[Trait("Category", "Integration")]` (xUnit) +- `[Category("Integration")]` (NUnit) +- Project name ending in `.IntegrationTests` or `.E2ETests` + +## Setup/Teardown Methods + +| Framework | Setup | Teardown | +| --------- | ----- | -------- | +| MSTest | `[TestInitialize]` or constructor | `[TestCleanup]` or `IDisposable.Dispose` / `IAsyncDisposable.DisposeAsync` | +| xUnit | constructor | `IDisposable.Dispose` / `IAsyncDisposable.DisposeAsync` | +| NUnit | `[SetUp]` | `[TearDown]` | +| MSTest (class) | `[ClassInitialize]` | `[ClassCleanup]` | +| NUnit (class) | `[OneTimeSetUp]` | `[OneTimeTearDown]` | +| xUnit (class) | `IClassFixture` | fixture's `Dispose` | diff --git a/.agents/skills/eval-performance/SKILL.md b/.agents/skills/eval-performance/SKILL.md new file mode 100644 index 0000000000..f959bcaa79 --- /dev/null +++ b/.agents/skills/eval-performance/SKILL.md @@ -0,0 +1,87 @@ +--- +name: eval-performance +description: "Guide for diagnosing and improving MSBuild project evaluation performance. Only activate in MSBuild/.NET build context. USE FOR: builds slow before any compilation starts, high evaluation time in binlog analysis, expensive glob patterns walking large directories (node_modules, .git, bin/obj), deep import chains (>20 levels), preprocessed output >10K lines indicating heavy evaluation, property functions with file I/O ($([System.IO.File]::ReadAllText(...))), multiple evaluations per project. Covers the 5 MSBuild evaluation phases, glob optimization via DefaultItemExcludes, import chain analysis with /pp preprocessing. DO NOT USE FOR: compilation-time slowness (use build-perf-diagnostics), incremental build issues (use incremental-build), non-MSBuild build systems. INVOKES: dotnet msbuild -pp:full.xml for preprocessing, /clp:PerformanceSummary." +--- + +## MSBuild Evaluation Phases + +For a comprehensive overview of MSBuild's evaluation and execution model, see [Build process overview](https://learn.microsoft.com/en-us/visualstudio/msbuild/build-process-overview). + +1. **Initial properties**: environment variables, global properties, reserved properties +2. **Imports and property evaluation**: process ``, evaluate `` top-to-bottom +3. **Item definition evaluation**: `` metadata defaults +4. **Item evaluation**: `` with `Include`, `Remove`, `Update`, glob expansion +5. **UsingTask evaluation**: register custom tasks + +Key insight: evaluation happens BEFORE any targets run. Slow evaluation = slow build start even when nothing needs compiling. + +## Diagnosing Evaluation Performance + +### Using binlog + +1. Replay the binlog: `dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log` +2. Search for evaluation events: `grep -i 'Evaluation started\|Evaluation finished' full.log` +3. Multiple evaluations for the same project = overbuilding +4. Look for "Project evaluation started/finished" messages and their timestamps + +### Using /pp (preprocess) + +- `dotnet msbuild -pp:full.xml MyProject.csproj` +- Shows the fully expanded project with ALL imports inlined +- Use to understand: what's imported, import depth, total content volume +- Large preprocessed output (>10K lines) = heavy evaluation + +### Using /clp:PerformanceSummary + +- Add to build command for timing breakdown +- Shows evaluation time separately from target/task execution + +## Expensive Glob Patterns + +- Globs like `**/*.cs` walk the entire directory tree +- Default SDK globs are optimized, but custom globs may not be +- Problem: globbing over `node_modules/`, `.git/`, `bin/`, `obj/` — millions of files +- Fix: use `` to exclude large directories +- Fix: be specific with glob paths: `src/**/*.cs` instead of `**/*.cs` +- Fix: use `false` only as last resort (lose SDK defaults) +- Check: grep for Compile items in the diagnostic log → if Compile items include unexpected files, globs are too broad + +## Import Chain Analysis + +- Deep import chains (>20 levels) slow evaluation +- Each import: file I/O + parse + evaluate +- Common causes: NuGet packages adding .props/.targets, framework SDK imports, Directory.Build chains +- Diagnosis: `/pp` output → search for ` + + + + + + + + + + + + +``` + +### For Generated Source Files (Code That Needs Compilation) + +If you're generating `.cs` files that need to be compiled, use **`BeforeTargets="CoreCompile;BeforeCompile"`**. This is the correct timing for adding `Compile` items — it runs late enough that the file generation has occurred, but before the compiler runs. Using `BeforeBuild` is too early for some scenarios and may not work reliably with all SDK features. + +```xml + + + $(IntermediateOutputPath)Generated\ + $(GeneratedCodeDir)MyGeneratedFile.cs + + + + + + + + + + + +``` + +Note: Specifying both `CoreCompile` and `BeforeCompile` ensures the target runs before whichever target comes first, providing robust ordering regardless of customizations in the build. + +## Target Timing + +Choose the `BeforeTargets` value based on the type of file being generated: + +- **`BeforeTargets="BeforeBuild"`** — For non-code files added to `None` or `Content`. Runs early enough for copy-to-output scenarios. +- **`BeforeTargets="CoreCompile;BeforeCompile"`** — For generated source files added to `Compile`. Ensures the file is included before the compiler runs. +- **`BeforeTargets="AssignTargetPaths"`** — The "final stop" before `None` and `Content` items (among others) are transformed into new items. Use as a fallback if `BeforeBuild` is too early. + +## Globbing Behavior + +Globs behave according to **when** the glob took place: + +| Glob Location | Files Captured | +|---------------|----------------| +| Outside of a target | Only files visible during Evaluation phase (before build starts) | +| Inside of a target | Files visible when the target runs (can capture generated files if timed correctly) | + +This is why the solution places the `` inside a `` - the glob runs during execution when the generated files exist. + +## Relevant Links + +- [How MSBuild Builds Projects](https://docs.microsoft.com/visualstudio/msbuild/build-process-overview) +- [Evaluation Phase](https://docs.microsoft.com/visualstudio/msbuild/build-process-overview#evaluation-phase) +- [Execution Phase](https://docs.microsoft.com/visualstudio/msbuild/build-process-overview#execution-phase) +- [Common Item Types](https://docs.microsoft.com/visualstudio/msbuild/common-msbuild-project-items) +- [How the SDK imports items by default](https://github.com/dotnet/sdk/blob/main/src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.Sdk.DefaultItems.props) +- [Official docs: Handle generated files](https://learn.microsoft.com/visualstudio/msbuild/customize-your-build#handle-generated-files) diff --git a/.agents/skills/incremental-build/SKILL.md b/.agents/skills/incremental-build/SKILL.md new file mode 100644 index 0000000000..f1d13a03ed --- /dev/null +++ b/.agents/skills/incremental-build/SKILL.md @@ -0,0 +1,218 @@ +--- +name: incremental-build +description: "Guide for optimizing MSBuild incremental builds. Only activate in MSBuild/.NET build context. USE FOR: builds slower than expected on subsequent runs, 'nothing changed but it rebuilds anyway', diagnosing why targets re-execute unnecessarily, fixing broken no-op builds. Covers 8 common causes: missing Inputs/Outputs on custom targets, volatile properties in output paths (timestamps/GUIDs), file writes outside tracked Outputs, missing FileWrites registration, glob changes, Visual Studio Fast Up-to-Date Check (FUTDC) issues. Key diagnostic: look for 'Building target completely' vs 'Skipping target' in binlog. DO NOT USE FOR: first-time build slowness (use build-perf-baseline), parallelism issues (use build-parallelism), evaluation-phase slowness (use eval-performance), non-MSBuild build systems. INVOKES: dotnet build /bl, binlog replay with diagnostic verbosity." +--- + +## How MSBuild Incremental Build Works + +MSBuild's incremental build mechanism allows targets to be skipped when their outputs are already up to date, dramatically reducing build times on subsequent runs. + +- **Targets with `Inputs` and `Outputs` attributes**: MSBuild compares the timestamps of all files listed in `Inputs` against all files listed in `Outputs`. If every output file is newer than every input file, the target is skipped entirely. +- **Without `Inputs`/`Outputs`**: The target runs every time the build is invoked. This is the default behavior and the most common cause of slow incremental builds. +- **`Incremental` attribute on targets**: Targets can explicitly opt in or out of incremental behavior. Setting `Incremental="false"` forces the target to always run, even if `Inputs` and `Outputs` are specified. +- **Timestamp-based comparison**: MSBuild uses file system timestamps (last write time) to determine staleness. It does not use content hashes. This means touching a file (updating its timestamp without changing content) will trigger a rebuild. + +```xml + + + + + + + + + +``` + +## Why Incremental Builds Break (Top Causes) + +1. **Missing Inputs/Outputs on custom targets** — Without both attributes, the target always runs. This is the single most common cause of unnecessary rebuilds. + +2. **Volatile properties in Outputs path** — If the output path includes something that changes between builds (e.g., a timestamp, build number, or random GUID), MSBuild will never find the previous output and will always rebuild. + +3. **File writes outside of tracked Outputs** — If a target writes files that aren't listed in its `Outputs`, MSBuild doesn't know about them. The target may be skipped (because its declared outputs are up to date), but downstream targets may still be triggered. + +4. **Missing FileWrites registration** — Files created during the build but not registered in the `FileWrites` item group won't be cleaned by `dotnet clean`. Over time, stale files can confuse incremental checks. + +5. **Glob changes** — When you add or remove source files, the item set (e.g., `@(Compile)`) changes. Since these items feed into `Inputs`, the set of inputs changes and triggers a rebuild. This is expected behavior but can be surprising. + +6. **Property changes** — Properties that feed into `Inputs` or `Outputs` paths (e.g., `$(Configuration)`, `$(TargetFramework)`) will cause rebuilds when changed. Switching between Debug and Release is a full rebuild by design. + +7. **NuGet package updates** — Changing a package version updates `project.assets.json` and potentially many resolved assembly paths. This changes the inputs to `ResolveAssemblyReferences` and `CoreCompile`, triggering a rebuild. + +8. **Build server VBCSCompiler cache invalidation** — The Roslyn compiler server (`VBCSCompiler`) caches compilation state. If the server is recycled (timeout, crash, or manual kill), the next build may be slower even though MSBuild's incremental checks pass, because the compiler must repopulate its in-memory caches. + +## Diagnosing "Why Did This Rebuild?" + +Use binary logs (binlogs) to understand exactly why targets ran instead of being skipped. + +### Step-by-step using binlog + +1. **Build twice with binlogs** to capture the incremental build behavior: + ```shell + dotnet build /bl:first.binlog + dotnet build /bl:second.binlog + ``` + The first build establishes the baseline. The second build is the one you want to be incremental. Analyze `second.binlog`. + +2. **Replay the second binlog** to a diagnostic text log: + ```shell + dotnet msbuild second.binlog -noconlog -fl -flp:v=diag;logfile=second-full.log;performancesummary + ``` + Then search for targets that actually executed: + ```bash + grep 'Building target\|Target.*was not skipped' second-full.log + ``` + In a perfectly incremental build, most targets should be skipped. + +3. **Inspect non-skipped targets** by looking for their execution messages in the diagnostic log. Check for "out of date" messages that indicate why a target ran. + +4. **Look for key messages** in the binlog: + - `"Building target 'X' completely"` — means MSBuild found no outputs or all outputs are missing; this is a full target execution. + - `"Building target 'X' incrementally"` — means some (but not all) outputs are out of date. + - `"Skipping target 'X' because all output files are up-to-date"` — target was correctly skipped. + +5. **Search for "is newer than output"** messages to find the specific input file that triggered the rebuild: + ```bash + grep "is newer than output" second-full.log + ``` + This reveals exactly which input file's timestamp caused MSBuild to consider the target out of date. + +### Additional diagnostic techniques + +- Compare `first.binlog` and `second.binlog` side by side in the MSBuild Structured Log Viewer to see what changed. +- Use `grep 'Target Performance Summary' -A 30 second-full.log` to see which targets consumed the most time in the second build — these are your optimization targets. +- Check for targets with zero-duration that still ran — they may have unnecessary dependencies causing them to execute. + +## FileWrites and Clean Build + +The `FileWrites` item group is MSBuild's mechanism for tracking files generated during the build. It powers `dotnet clean` and helps maintain correct incremental behavior. + +- **`FileWrites` item**: Register any file your custom targets create so that `dotnet clean` knows to remove them. Without this, generated files accumulate across builds and may confuse incremental checks. +- **`FileWritesShareable` item**: Use this for files that are shared across multiple projects (e.g., shared generated code). These files are tracked but not deleted if other projects still reference them. +- **If not registered**: Files accumulate in the output and intermediate directories. `dotnet clean` won't remove them, and they may cause stale data issues or confuse up-to-date checks. + +### Pattern for registering generated files + +Add generated files to `FileWrites` inside the target that creates them: + +```xml + + + + + + + + + +``` + +## Visual Studio Fast Up-to-Date Check + +Visual Studio has its own up-to-date check (Fast Up-to-Date Check, or FUTDC) that is separate from MSBuild's `Inputs`/`Outputs` mechanism. Understanding the difference is critical for diagnosing "it rebuilds in VS but not on the command line" issues. + +- **VS FUTDC is faster** because it runs in-process and checks a known set of items without invoking MSBuild at all. It compares timestamps of well-known item types (Compile, Content, EmbeddedResource, etc.) against the project's primary output. +- **It can be wrong** if your project uses custom build actions, custom targets that generate files, or non-standard item types that FUTDC doesn't know about. +- **Disable FUTDC** to force Visual Studio to use MSBuild's full incremental check: + ```xml + + true + + ``` +- **Diagnose FUTDC decisions** by viewing the Output window in VS: go to **Tools → Options → Projects and Solutions → SDK-Style Projects** and set **Up-to-date Checks** logging level to **Verbose** or above. FUTDC will log exactly which file it considers out of date. +- **Common VS FUTDC issues**: + - Custom build actions not registered with the FUTDC system + - `CopyToOutputDirectory` items that are newer than the last build + - Items added dynamically by targets that FUTDC doesn't evaluate + - `Content` or `None` items with `CopyToOutputDirectory="PreserveNewest"` that have been modified + +## Making Custom Targets Incremental + +The following is a complete example of a well-structured incremental custom target: + +```xml + + + + + + + + +``` + +**Key points in this example:** + +- **`Inputs` includes `$(MSBuildProjectFile)`**: This ensures the target reruns if the project file itself changes (e.g., a property that affects generation is modified). +- **`Inputs` includes `@(ConfigInput)`**: The actual source files that drive generation. +- **`Outputs` uses `$(IntermediateOutputPath)`**: Generated files go in the `obj/` directory, which is managed by MSBuild and cleaned automatically. +- **`BeforeTargets="CoreCompile"`**: The generated file is available before the compiler runs. +- **`FileWrites` registration**: Ensures `dotnet clean` removes the generated file. +- **`Compile` inclusion**: Adds the generated file to the compilation without requiring it to exist at evaluation time. + +### Common mistakes to avoid + +```xml + + + + + + + + + + + + + + + + + + +``` + +## Performance Summary and Preprocess + +MSBuild provides built-in tools to understand what's running and why. + +- **`/clp:PerformanceSummary`** — Appends a summary at the end of the build showing time spent in each target and task. Use this to quickly identify the most expensive operations: + ```shell + dotnet build /clp:PerformanceSummary + ``` + This shows a table of targets sorted by cumulative time, making it easy to spot targets that shouldn't be running in an incremental build. + +- **`/pp:preprocess.xml`** — Generates a single XML file with all imports inlined, showing the fully evaluated project. This is invaluable for understanding what targets, properties, and items are defined and where they come from: + ```shell + dotnet msbuild /pp:preprocess.xml + ``` + Search the preprocessed output to find where `Inputs` and `Outputs` are defined for any target, or to understand the full chain of imports. + +- Use both together to understand what's running (`PerformanceSummary`) and what's imported (`/pp`), then cross-reference with binlog analysis for a complete picture. + +## Common Fixes + +- **Always add `Inputs` and `Outputs` to custom targets** — This is the single most impactful change for incremental build performance. Without both attributes, the target runs every time. +- **Use `$(IntermediateOutputPath)` for generated files** — Files in `obj/` are tracked by MSBuild's clean infrastructure and won't leak between configurations. +- **Register generated files in `FileWrites`** — Ensures `dotnet clean` removes them and prevents stale file accumulation. +- **Avoid volatile data in build** — Don't embed timestamps, random values, or build counters in file paths or generated content unless you have a deliberate strategy for managing staleness. If you must use volatile data, isolate it to a single file with minimal downstream impact. +- **Use `Returns` instead of `Outputs` when you need to pass items without creating incremental build dependency** — `Outputs` serves double duty: it defines the incremental check AND the items returned from the target. If you only need to pass items to calling targets without affecting incrementality, use `Returns` instead: + ```xml + + ... + + + ... + ``` diff --git a/.agents/skills/migrate-mstest-v1v2-to-v3/SKILL.md b/.agents/skills/migrate-mstest-v1v2-to-v3/SKILL.md new file mode 100644 index 0000000000..85377105d9 --- /dev/null +++ b/.agents/skills/migrate-mstest-v1v2-to-v3/SKILL.md @@ -0,0 +1,197 @@ +--- +name: migrate-mstest-v1v2-to-v3 +description: > + Migrate MSTest v1 or v2 test project to MSTest v3. Use when user says + "upgrade MSTest", "upgrade to MSTest v3", "migrate to MSTest v3", + "update test framework", "modernize tests", "MSTest v3 migration", + "MSTest compatibility", "MSTest v2 to v3", or build errors after + updating MSTest packages from 1.x/2.x to 3.x. + USE FOR: upgrading from MSTest v1 assembly references + (Microsoft.VisualStudio.QualityTools.UnitTestFramework) or MSTest v2 NuGet + (MSTest.TestFramework 1.x-2.x) to MSTest v3, fixing assertion overload + errors (AreEqual/AreNotEqual), updating DataRow constructors, replacing + .testsettings with .runsettings, timeout behavior changes, target framework + compatibility (.NET 5 dropped -- use .NET 6+; .NET Fx older than 4.6.2 dropped), + adopting MSTest.Sdk. + First step toward MSTest v4 -- after this, use migrate-mstest-v3-to-v4. + DO NOT USE FOR: migrating to MSTest v4 (use migrate-mstest-v3-to-v4), + migrating between frameworks (MSTest to xUnit/NUnit), or general .NET + upgrades unrelated to MSTest. +--- + +# MSTest v1/v2 -> v3 Migration + +Migrate a test project from MSTest v1 (assembly references) or MSTest v2 (NuGet 1.x-2.x) to MSTest v3. MSTest v3 is **not binary compatible** with v1/v2 -- libraries compiled against v1/v2 must be recompiled. + +## When to Use + +- Project references `Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll` (MSTest v1) +- Project uses `MSTest.TestFramework` / `MSTest.TestAdapter` NuGet 1.x or 2.x +- Resolving build errors after updating MSTest packages from v1/v2 to v3 +- Replacing `.testsettings` with `.runsettings` +- Adopting MSTest.Sdk or in-assembly parallel execution + +## When Not to Use + +- Project already uses MSTest v3 (3.x packages) +- Upgrading v3 to v4 -- use `migrate-mstest-v3-to-v4` +- Migrating between frameworks (MSTest to xUnit/NUnit) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Project or solution path | Yes | The `.csproj`, `.sln`, or `.slnx` entry point containing MSTest test projects | +| Build command | No | How to build (e.g., `dotnet build`, a repo build script). Auto-detect if not provided | +| Test command | No | How to run tests (e.g., `dotnet test`). Auto-detect if not provided | + +## Breaking Changes Summary + +MSTest v3 introduces these breaking changes from v1/v2. Address only the ones relevant to the project: + +| Breaking Change | Impact | Fix | +|---|---|---| +| `Assert.AreEqual(object, object)` overload removed | Compile error on untyped assertions | Add generic type: `Assert.AreEqual(expected, actual)`. Same for `AreNotEqual`, `AreSame`, `AreNotSame` | +| `DataRow` strict type matching | Runtime/compile errors when argument types don't match parameter types exactly | Change literals to exact types: `1` for int, `1L` for long, `1.0f` for float | +| `DataRow` max 16 constructor parameters (early v3) | Compile error if >16 args; fixed in later v3 versions | Update to latest 3.x, or refactor test / wrap extra params in array | +| `.testsettings` / `` no longer supported | Settings silently ignored | Delete `.testsettings`, create `.runsettings` with equivalent config | +| Timeout behavior unified across .NET Core / Framework | Tests with `[Timeout]` may behave differently | Verify timeout values; adjust if needed | +| Dropped target frameworks: .NET 5, .NET Fx < 4.6.2, netstandard1.0, UWP < 16299, WinUI < 18362 | Build error | Update TFM: .NET 5 -> net8.0 (LTS) or net6.0+, netfx -> net462+, netstandard1.0 -> netstandard2.0. Note: net6.0, net8.0, net9.0 are all supported | +| Not binary compatible with v1/v2 | Libraries compiled against v1/v2 must be recompiled | Recompile all dependencies against v3 | + +## Response Guidelines + +- **Always identify the current version first**: Before recommending any migration steps, explicitly state the current MSTest version detected in the project (e.g., "Your project uses MSTest v2 (2.2.10)" or "This is an MSTest v1 project using QualityTools assembly references"). This grounds the migration advice and confirms you've read the project files. +- **Focused fix requests** (user has specific compilation errors after upgrading): Address only the relevant breaking change from the table above. Show a concise before/after fix. Do not walk through the full migration workflow. +- **Specific feature migration** (user asks about one aspect like .testsettings, DataRow, or assertions): Address only that specific aspect with a concrete fix. Do not walk through the entire migration workflow or unrelated breaking changes. +- **"What to expect" questions** (user asks about breaking changes before upgrading): Present only the breaking changes that are clearly relevant to the user's visible code and configuration. For each, give a one-line fix summary. Do not include every possible breaking change -- only the ones that apply. Do not walk through the full workflow. +- **Full migration requests** (user wants complete migration): Follow the complete workflow below. +- **Comparison questions** (user asks about v1 vs v2 differences): Explain concisely -- v1 uses assembly references and requires removing them first; v2 uses NuGet and just needs a version bump. Both converge on the same v3 packages and breaking changes. + +## Migration Paths + +- **MSTest v1 (assembly reference to QualityTools)**: Remove the assembly reference (Step 2), add v3 NuGet packages (Step 3), fix breaking changes (Step 5). +- **MSTest v2 (NuGet packages 1.x-2.x)**: Update package versions to 3.x (Step 3), fix breaking changes (Step 5). No assembly reference removal needed. + +Both paths converge at Step 3 -- the same v3 packages and breaking changes apply regardless of starting version. + +## Workflow + +### Step 1: Assess the project + +1. Identify which MSTest version is currently in use: + - **Assembly reference**: Look for `Microsoft.VisualStudio.QualityTools.UnitTestFramework` in project references -> MSTest v1 + - **NuGet packages**: Check `MSTest.TestFramework` and `MSTest.TestAdapter` package versions -> v1 if 1.x, v2 if 2.x +2. Check if the project uses a `.testsettings` file (indicated by `` in test configuration) +3. Check if the target framework is dropped in v3 (see Step 4) +4. Run a clean build to establish a baseline of existing errors/warnings + +### Step 2: Remove v1 assembly references (if applicable) + +If the project uses MSTest v1 via assembly references: + +1. Remove the reference to `Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll` + - In SDK-style projects, remove the `` element from the `.csproj` + - In non-SDK-style projects, remove via Visual Studio Solution Explorer -> References -> right-click -> Remove +2. Save the project file + +### Step 3: Update packages to MSTest v3 + +Choose one of these approaches: + +**Option A -- Install the MSTest metapackage (recommended):** + +Remove individual `MSTest.TestFramework` and `MSTest.TestAdapter` package references and replace with the unified `MSTest` metapackage: + +```xml + +``` + +Also ensure `Microsoft.NET.Test.Sdk` is referenced (or update individual `MSTest.TestFramework` + `MSTest.TestAdapter` packages to 3.8.0 if you prefer not using the metapackage). + +**Option B -- Use MSTest.Sdk (SDK-style projects only):** + +Change `` to ``. MSTest.Sdk automatically provides MSTest.TestFramework, MSTest.TestAdapter, MSTest.Analyzers, and Microsoft.NET.Test.Sdk. + +> **Important**: MSTest.Sdk defaults to Microsoft.Testing.Platform (MTP) instead of VSTest. For VSTest compatibility (e.g., `vstest.console` in CI), add ``. + +When switching to MSTest.Sdk, remove these (SDK provides them automatically): + +- **Packages**: `MSTest`, `MSTest.TestFramework`, `MSTest.TestAdapter`, `MSTest.Analyzers`, `Microsoft.NET.Test.Sdk` +- **Properties**: ``, `Exe`, `false`, `true` + +### Step 4: Update target frameworks if needed + +MSTest v3 supports .NET 6+, .NET Core 3.1, .NET Framework 4.6.2+, .NET Standard 2.0, UWP 16299+, and WinUI 18362+. If the project targets a dropped framework version, update to a supported one: + +| Dropped | Recommended replacement | +|---------|------------------------| +| .NET 5 | .NET 8.0 (current LTS) or .NET 6+ | +| .NET Framework < 4.6.2 | .NET Framework 4.6.2 | +| .NET Standard 1.0 | .NET Standard 2.0 | +| UWP < 16299 | UWP 16299 | +| WinUI < 18362 | WinUI 18362 | + +> **Note**: .NET 6, .NET 8, and .NET 9 are all supported by MSTest v3. Do not change TFMs that are already supported. + +### Step 5: Resolve build errors and breaking changes + +Run `dotnet build` and fix errors using the Breaking Changes Summary above. Key fixes: + +**Assertion overloads** -- MSTest v3 removed `Assert.AreEqual(object, object)` and `Assert.AreNotEqual(object, object)`. Add explicit generic type parameters: + +```csharp +// Before (v1/v2) // After (v3) +Assert.AreEqual(expected, actual); -> Assert.AreEqual(expected, actual); +Assert.AreNotEqual(a, b); -> Assert.AreNotEqual(a, b); +Assert.AreSame(expected, actual); -> Assert.AreSame(expected, actual); +``` + +**DataRow strict type matching** -- argument types must exactly match parameter types. Implicit conversions that worked in v2 fail in v3: + +```csharp +// Error: 1L (long) won't convert to int parameter -> fix: use 1 (int) +// Error: 1.0 (double) won't convert to float parameter -> fix: use 1.0f (float) +``` + +**Timeout behavior** -- unified across .NET Core and .NET Framework. Verify `[Timeout]` values still work. + +### Step 6: Replace .testsettings with .runsettings + +The `.testsettings` file and `` are no longer supported in MSTest v3. **Delete the `.testsettings` file** and create a `.runsettings` file -- do not keep both. + +Key mappings: + +| .testsettings | .runsettings equivalent | +|---|---| +| `TestTimeout` property | `30000` | +| Deployment config | `true` or remove | +| Assembly resolution settings | Remove -- not needed in modern .NET | +| Data collectors | `` section | + +> **Important**: Map timeout to `` (per-test), **not** `` (session-wide). Remove `` entirely. + +### Step 7: Verify + +1. Run `dotnet build` -- confirm zero errors and review any new warnings +2. Run `dotnet test` -- confirm all tests pass +3. Compare test results (pass/fail counts) to the pre-migration baseline +4. Check that no tests were silently dropped due to discovery changes + +## Validation + +- [ ] MSTest v3 packages (or MSTest.Sdk) correctly referenced; v1/v2 references removed +- [ ] Project builds with zero errors +- [ ] All tests pass (`dotnet test`) -- compare pass/fail counts to pre-migration baseline +- [ ] `.testsettings` replaced with `.runsettings` (if applicable) + +## Next Step + +After v3 migration, use `migrate-mstest-v3-to-v4` for MSTest v4. + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Missing `Microsoft.NET.Test.Sdk` | Add package reference -- required for test discovery with VSTest | +| MSTest.Sdk tests not found by `vstest.console` | MSTest.Sdk defaults to Microsoft.Testing.Platform; add explicit `Microsoft.NET.Test.Sdk` for VSTest compatibility | diff --git a/.agents/skills/migrate-mstest-v3-to-v4/SKILL.md b/.agents/skills/migrate-mstest-v3-to-v4/SKILL.md new file mode 100644 index 0000000000..49e7ec9b6e --- /dev/null +++ b/.agents/skills/migrate-mstest-v3-to-v4/SKILL.md @@ -0,0 +1,478 @@ +--- +name: migrate-mstest-v3-to-v4 +description: > + Fix build errors and breaking changes after upgrading MSTest from v3 to v4, + or plan a complete MSTest v3-to-v4 migration. Use when user says "upgrade to + MSTest v4", "MSTest 4 migration", "MSTest v4 breaking changes", "tests don't + compile after upgrading MSTest", or has errors CS0507, CS0103, CS1061, CS1615 after updating MSTest packages from 3.x to 4.x. + USE FOR: Execute to ExecuteAsync, CallerInfo constructor on TestMethodAttribute, + sealed custom attributes, ClassCleanupBehavior removal, TestContext.Properties + Contains to ContainsKey, Assert.ThrowsException to ThrowsExactly, + Assert.IsInstanceOfType out parameter removal, ExpectedExceptionAttribute + removal, TestTimeout enum removal, [TestMethod("name")] to DisplayName syntax, + TreatDiscoveryWarningsAsErrors, TestContext.TestName in ClassInitialize, + MSTest.Sdk MTP changes, dropped TFMs (net6.0/net7.0 to net8.0+). + DO NOT USE FOR: migrating from MSTest v1/v2 to v3 (use migrate-mstest-v1v2-to-v3 + first), migrating between test frameworks, or general .NET upgrades. +--- + +# MSTest v3 -> v4 Migration + +Migrate a test project from MSTest v3 to MSTest v4. The outcome is a project using MSTest v4 that builds cleanly, passes tests, and accounts for every source-incompatible and behavioral change. MSTest v4 is **not binary compatible** with MSTest v3 -- any library compiled against v3 must be recompiled against v4. + +## When to Use + +- Upgrading `MSTest.TestFramework`, `MSTest.TestAdapter`, or `MSTest` metapackage from 3.x to 4.x +- Upgrading `MSTest.Sdk` from 3.x to 4.x +- Fixing build errors after updating to MSTest v4 packages +- Resolving behavioral changes in test execution after upgrading to MSTest v4 +- Updating custom `TestMethodAttribute` or `ConditionBaseAttribute` implementations for v4 + +## When Not to Use + +- The project already uses MSTest v4 and builds cleanly -- migration is done +- Upgrading from MSTest v1 or v2 -- use `migrate-mstest-v1v2-to-v3` first, then return here +- The project does not use MSTest +- Migrating between test frameworks (e.g., MSTest to xUnit or NUnit) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Project or solution path | Yes | The `.csproj`, `.sln`, or `.slnx` entry point containing MSTest test projects | +| Build command | No | How to build (e.g., `dotnet build`, a repo build script). Auto-detect if not provided | +| Test command | No | How to run tests (e.g., `dotnet test`). Auto-detect if not provided | + +## Response Guidelines + +- **Always identify the current version first**: Before recommending any migration steps, explicitly state the current MSTest version detected in the project (e.g., "Your project uses MSTest v3 (3.8.0)"). This confirms you've read the project files and grounds the migration advice. +- **Focused fix requests** (user has specific compilation errors after upgrading): Address only the relevant breaking changes from Step 3. **Always provide concrete fixed code** using the user's actual types and method names — show a complete, copy-pasteable code snippet, not just a description of what to change. For custom `TestMethodAttribute` subclasses, show the full fixed class including CallerInfo propagation to the base constructor. Mention any related analyzer that could have caught this earlier (e.g., MSTEST0006 for ExpectedException). Do not walk through the entire migration workflow. +- **"What to expect" questions** (user asks about breaking changes before upgrading): Present ALL major breaking changes from the Step 3 quick-lookup table -- not just the ones visible in the current code. For each, provide a one-line fix summary. Also mention key behavioral changes from Step 4 (especially TestCase.Id history impact and TreatDiscoveryWarningsAsErrors default). If project code is available, highlight which changes apply directly. +- **Full migration requests** (user wants complete migration): Follow the complete workflow below. +- **Behavioral/runtime symptom reports** (user describes test execution differences without build errors): Match described symptoms to the behavioral changes table in Step 4. Provide targeted, symptom-specific advice. Mention other behavioral changes the user should watch for. Do not walk through source breaking changes unless the user also has build errors. +- **CI/test-discovery issues** (tests not discovered, vstest.console stopped working, CI pipeline failures after upgrading): Focus on 4.5 (MSTest.Sdk defaults to MTP mode, which does not include Microsoft.NET.Test.Sdk -- needed for vstest.console) and 4.4 (TreatDiscoveryWarningsAsErrors). Explain the root cause clearly and give both fix options (add Microsoft.NET.Test.Sdk package or switch to `dotnet test`). Do not walk through the full migration workflow. +- **Explanatory questions** (user asks "is this a known change?", "what else should I watch out for?"): Explain the relevant changes and advise. Mention related changes the user might encounter next. Do not prescribe a full migration procedure. + +## Workflow + +> **Commit strategy:** Commit at each logical boundary -- after updating packages (Step 2), after resolving source breaking changes (Step 3), after addressing behavioral changes (Step 4). This keeps each commit focused and reviewable. + +### Step 1: Assess the project + +1. Identify the current MSTest version by checking package references for `MSTest`, `MSTest.TestFramework`, `MSTest.TestAdapter`, or `MSTest.Sdk` in `.csproj`, `Directory.Build.props`, or `Directory.Packages.props`. +2. Confirm the project is on MSTest v3 (3.x). If on v1 or v2, use `migrate-mstest-v1v2-to-v3` first. +3. Check target framework(s) -- MSTest v4 drops support for .NET Core 3.1 through .NET 7. Supported target frameworks are: **net8.0**, **net9.0**, **net462** (.NET Framework 4.6.2+), **uap10.0.16299** (UWP), **net9.0-windows10.0.17763.0** (modern UWP), and **net8.0-windows10.0.18362.0** (WinUI). +4. Check for custom `TestMethodAttribute` subclasses -- these require changes in v4. +5. Check for usages of `ExpectedExceptionAttribute` -- removed in v4 (deprecated since v3 with analyzer MSTEST0006). +6. Check for usages of `Assert.ThrowsException` (deprecated) -- removed in v4. +7. Run a clean build to establish a baseline of existing errors/warnings. + +### Step 2: Update packages to MSTest v4 + +**If using the MSTest metapackage:** + +```xml + +``` + +**If using individual packages:** + +```xml + + +``` + +**If using MSTest.Sdk:** + +```xml + +``` + +Run `dotnet restore`, then `dotnet build`. Collect all errors for Step 3. + +### Step 3: Resolve source breaking changes + +Work through compilation errors systematically. Use this quick-lookup table to identify all applicable changes, then apply each fix: + +| Error / Pattern in code | Breaking change | Fix | +|---|---|---| +| Custom `TestMethodAttribute` overrides `Execute` | Execute removed | Change to `ExecuteAsync` returning `Task` (3.1) | +| `[TestMethod("name")]` or custom attribute constructor | CallerInfo params added | Use `DisplayName = "name"` named param; propagate CallerInfo in subclasses (3.2) | +| `ClassCleanupBehavior.EndOfClass` | Enum removed | Remove argument: just `[ClassCleanup]` (3.3) | +| `TestContext.Properties.Contains("key")` | `Properties` is `IDictionary` | Change to `ContainsKey("key")` (3.4) | +| `[Timeout(TestTimeout.Infinite)]` | `TestTimeout` enum removed | Replace with `[Timeout(int.MaxValue)]` (3.5) | +| `TestContext.ManagedType` | Property removed | Use `FullyQualifiedTestClassName` (3.6) | +| `Assert.AreEqual(a, b, "msg {0}", arg)` | Message+params overloads removed | Use string interpolation: `$"msg {arg}"` (3.7) | +| `Assert.ThrowsException(...)` | Renamed | Replace with `Assert.ThrowsExactly(...)` or `Assert.Throws(...)` (3.7) | +| `Assert.IsInstanceOfType(obj, out var t)` | Out parameter removed | Use `var t = Assert.IsInstanceOfType(obj)` (3.7) | +| `[ExpectedException(typeof(T))]` | Attribute removed | Move assertion into test body: `Assert.ThrowsExactly(() => ...)` (3.8) | +| Project targets net5.0, net6.0, or net7.0 | TFM dropped | Change to net8.0 or net9.0 (3.9) | + +> **Important**: Scan the entire project for ALL patterns above before starting fixes. Multiple breaking changes often coexist in the same project. + +#### 3.1 TestMethodAttribute.Execute -> ExecuteAsync + +If you have custom `TestMethodAttribute` subclasses that override `Execute`, change to `ExecuteAsync`. This change was made because the v3 synchronous `Execute` API caused deadlocks when test code used `async`/`await` internally -- the synchronous wrapper would block the thread while the async operation needed that same thread to complete. + +```csharp +// Before (v3) +public sealed class MyTestMethodAttribute : TestMethodAttribute +{ + public override TestResult[] Execute(ITestMethod testMethod) + { + // custom logic + return result; + } +} + +// After (v4) -- Option A: wrap synchronous logic with Task.FromResult +public sealed class MyTestMethodAttribute : TestMethodAttribute +{ + public override Task ExecuteAsync(ITestMethod testMethod) + { + // custom logic (synchronous) + return Task.FromResult(result); + } +} + +// After (v4) -- Option B: make properly async +public sealed class MyTestMethodAttribute : TestMethodAttribute +{ + public override async Task ExecuteAsync(ITestMethod testMethod) + { + // custom async logic + return await base.ExecuteAsync(testMethod); + } +} +``` + +Use `Task.FromResult` when your override logic is purely synchronous. Use `async`/`await` when you call `base.ExecuteAsync` or other async methods. + +#### 3.2 TestMethodAttribute CallerInfo constructor + +`TestMethodAttribute` now uses `[CallerFilePath]` and `[CallerLineNumber]` parameters in its constructor. + +**If you inherit from TestMethodAttribute**, propagate caller info to the base class: + +```csharp +public class MyTestMethodAttribute : TestMethodAttribute +{ + public MyTestMethodAttribute( + [CallerFilePath] string callerFilePath = "", + [CallerLineNumber] int callerLineNumber = -1) + : base(callerFilePath, callerLineNumber) + { + } +} +``` + +**If you use `[TestMethodAttribute("Custom display name")]`**, switch to the named parameter syntax: + +```csharp +// Before (v3) +[TestMethodAttribute("Custom display name")] + +// After (v4) +[TestMethodAttribute(DisplayName = "Custom display name")] +``` + +#### 3.3 ClassCleanupBehavior enum removed + +The `ClassCleanupBehavior` enum is removed. In v3, this enum controlled whether class cleanup ran at end of class (`EndOfClass`) or end of assembly (`EndOfAssembly`). In v4, class cleanup always runs at end of class. Remove the enum argument: + +```csharp +// Before (v3) +[ClassCleanup(ClassCleanupBehavior.EndOfClass)] +public static void ClassCleanup(TestContext testContext) { } + +// After (v4) +[ClassCleanup] +public static void ClassCleanup(TestContext testContext) { } +``` + +If you previously used `ClassCleanupBehavior.EndOfAssembly`, move that cleanup logic to an `[AssemblyCleanup]` method instead. + +#### 3.4 TestContext.Properties type change + +`TestContext.Properties` changed from `IDictionary` to `IDictionary`. Update any `Contains` calls to `ContainsKey`: + +```csharp +// Before (v3) +testContext.Properties.Contains("key"); + +// After (v4) +testContext.Properties.ContainsKey("key"); +``` + +#### 3.5 TestTimeout enum removed + +The `TestTimeout` enum (with only `TestTimeout.Infinite`) is removed. Replace with `int.MaxValue`: + +```csharp +// Before (v3) +[Timeout(TestTimeout.Infinite)] + +// After (v4) +[Timeout(int.MaxValue)] +``` + +#### 3.6 TestContext.ManagedType removed + +The `TestContext.ManagedType` property is removed. Use `TestContext.FullyQualifiedTestClassName` instead. + +#### 3.7 Assert API signature changes + +- **Message + params removed**: Assert methods that accepted both `message` and `object[]` parameters now accept only `message`. Use string interpolation instead of format strings: + +```csharp +// Before (v3) +Assert.AreEqual(expected, actual, "Expected {0} but got {1}", expected, actual); + +// After (v4) +Assert.AreEqual(expected, actual, $"Expected {expected} but got {actual}"); +``` + +- **Assert.ThrowsException renamed**: The `Assert.ThrowsException` APIs are renamed. Use `Assert.ThrowsExactly` (strict type match) or `Assert.Throws` (accepts derived exception types): + +```csharp +// Before (v3) +Assert.ThrowsException(() => DoSomething()); + +// After (v4) -- exact type match (same behavior as old ThrowsException) +Assert.ThrowsExactly(() => DoSomething()); + +// After (v4) -- also catches derived exception types +Assert.Throws(() => DoSomething()); +``` + +- **Assert.IsInstanceOfType out parameter changed**: `Assert.IsInstanceOfType(x, out var t)` changes to `var t = Assert.IsInstanceOfType(x)`: + +```csharp +// Before (v3) +Assert.IsInstanceOfType(obj, out var typed); + +// After (v4) +var typed = Assert.IsInstanceOfType(obj); +``` + +- **Assert.AreEqual for IEquatable\ removed**: If you get generic type inference errors, explicitly specify the type argument as `object`. + +#### 3.8 ExpectedExceptionAttribute removed + +The `[ExpectedException]` attribute is removed in v4. In MSTest 3.2, the `MSTEST0006` analyzer was introduced to flag `[ExpectedException]` usage and suggest migrating to `Assert.ThrowsExactly` while still on v3 (a non-breaking change). In v4, the attribute is gone entirely. Migrate to `Assert.ThrowsExactly`: + +```csharp +// Before (v3) +[ExpectedException(typeof(InvalidOperationException))] +[TestMethod] +public void TestMethod() +{ + MyCall(); +} + +// After (v4) +[TestMethod] +public void TestMethod() +{ + Assert.ThrowsExactly(() => MyCall()); +} +``` + +**When the test has setup code before the throwing call**, wrap only the throwing call in the lambda -- keep Arrange/Act separation clear: + +```csharp +// Before (v3) +[ExpectedException(typeof(ArgumentNullException))] +[TestMethod] +public void Validate_NullInput_Throws() +{ + var service = new ValidationService(); + service.Validate(null); // throws here +} + +// After (v4) +[TestMethod] +public void Validate_NullInput_Throws() +{ + var service = new ValidationService(); + Assert.ThrowsExactly(() => service.Validate(null)); +} +``` + +**For async test methods**, use `Assert.ThrowsExactlyAsync`: + +```csharp +// Before (v3) +[ExpectedException(typeof(HttpRequestException))] +[TestMethod] +public async Task FetchData_BadUrl_Throws() +{ + await client.GetAsync("https://localhost:0"); +} + +// After (v4) +[TestMethod] +public async Task FetchData_BadUrl_Throws() +{ + await Assert.ThrowsExactlyAsync( + () => client.GetAsync("https://localhost:0")); +} +``` + +**If `[ExpectedException]` used the `AllowDerivedTypes` property**, use `Assert.ThrowsAsync` (base type matching) instead of `Assert.ThrowsExactlyAsync` (exact type matching). + +#### 3.9 Dropped target frameworks + +MSTest v4 supports: **net8.0**, **net9.0**, **net462** (.NET Framework 4.6.2+), **uap10.0.16299** (UWP), **net9.0-windows10.0.17763.0** (modern UWP), and **net8.0-windows10.0.18362.0** (WinUI). All other frameworks are dropped -- including net5.0, net6.0, net7.0, and netcoreapp3.1. + +If the test project targets an unsupported framework, update `TargetFramework`: + +```xml + +net6.0 + + +net8.0 +``` + +#### 3.10 Unfolding strategy moved to TestMethodAttribute + +The `UnfoldingStrategy` property (introduced in MSTest 3.7) has moved from individual data source attributes (`DataRowAttribute`, `DynamicDataAttribute`) to `TestMethodAttribute`. + +#### 3.11 ConditionBaseAttribute.ShouldRun renamed + +The `ConditionBaseAttribute.ShouldRun` property is renamed to `IsConditionMet`. + +#### 3.12 Internal/removed types + +Several types previously public are now internal or removed: + +- `MSTestDiscoverer`, `MSTestExecutor`, `AssemblyResolver`, `LogMessageListener` +- `TestExecutionManager`, `TestMethodInfo`, `TestResultExtensions` +- `UnitTestOutcomeExtensions`, `GenericParameterHelper` +- `ITestMethod` in PlatformServices assembly (the one in TestFramework is unchanged) + +If your code references any of these, find alternative approaches or remove the dependency. + +### Step 4: Address behavioral changes + +These changes won't cause build errors but may affect test runtime behavior. + +| Symptom | Cause | Fix | +|---|---|---| +| Tests show as new in Azure DevOps / test history lost | `TestCase.Id` generation changed (4.3) | No code fix; history will re-baseline | +| `TestContext.TestName` throws in `[ClassInitialize]` | v4 enforces lifecycle scope (4.2) | Move access to `[TestInitialize]` or test methods | +| Tests not discovered / discovery failures | `TreatDiscoveryWarningsAsErrors` now true (4.4) | Fix warnings, or set to false in .runsettings | +| Tests hang that didn't before | AppDomain disabled by default (4.1) | Set `DisableAppDomain` to false in .runsettings `RunConfiguration` | +| vstest.console can't find tests with MSTest.Sdk | MSTest.Sdk defaults to MTP; `Microsoft.NET.Test.Sdk` only added in VSTest mode (4.5) | Add explicit package reference or switch to `dotnet test` | +| New warnings from analyzers | Analyzer severities upgraded (4.6) | Fix warnings or suppress in .editorconfig | + +#### 4.1 DisableAppDomain defaults to true + +AppDomains are disabled by default. On .NET Framework, when running inside testhost (the default for `dotnet test` and VS), MSTest re-enables AppDomains automatically. If you need to explicitly control AppDomain isolation, set it via `.runsettings`: + +```xml + + + false + + +``` + +#### 4.2 TestContext throws when used incorrectly + +MSTest v4 now throws when accessing test-specific properties in the wrong lifecycle stage: + +- `TestContext.FullyQualifiedTestClassName` -- cannot be accessed in `[AssemblyInitialize]` +- `TestContext.TestName` -- cannot be accessed in `[AssemblyInitialize]` or `[ClassInitialize]` + +**Fix**: Move any code that accesses `TestContext.TestName` from `[ClassInitialize]` to `[TestInitialize]` or individual test methods, where per-test context is available. Do not replace `TestName` with `FullyQualifiedTestClassName` as a workaround -- they have different semantics. + +#### 4.3 TestCase.Id generation changed + +The generation algorithm for `TestCase.Id` has changed to fix long-standing bugs. This may affect Azure DevOps test result tracking (e.g., test failure tracking over time). There is no code fix needed, but be aware of test result history discontinuity. + +#### 4.4 TreatDiscoveryWarningsAsErrors defaults to true + +v4 uses stricter defaults. Discovery warnings are now treated as errors, which means tests that previously ran despite discovery issues may now fail entirely. If you see unexpected test failures after upgrading (not build errors, but tests not being discovered), check for discovery warnings. To restore v3 behavior while you investigate: + +```xml + + + false + + +``` + +> **Recommended**: Fix the underlying discovery warnings rather than suppressing this setting. + +#### 4.5 MSTest.Sdk and vstest.console compatibility + +MSTest.Sdk defaults to Microsoft.Testing.Platform (MTP) mode. In MTP mode, MSTest.Sdk does **not** add a reference to `Microsoft.NET.Test.Sdk` -- it only adds it in VSTest mode. This is not a v4-specific change; it applies to MSTest.Sdk v3 as well. Without `Microsoft.NET.Test.Sdk`, `vstest.console` cannot discover or run tests and will silently find zero tests. This commonly surfaces during migration when a CI pipeline uses `vstest.console` but the project uses MSTest.Sdk in its default MTP mode. + +**Option A -- Switch to VSTest mode**: Set the `UseVSTest` property. MSTest.Sdk will then automatically add `Microsoft.NET.Test.Sdk`: + +```xml + + + net8.0 + true + + +``` + +**Option B -- Switch CI to `dotnet test`**: Replace `vstest.console` invocations in your CI pipeline with `dotnet test`. This works natively with MTP and is the recommended long-term approach for MSTest.Sdk projects. + +If you need VSTest during a transition period, Option A works without changing CI pipelines. + +#### 4.6 Analyzer severity changes + +Multiple analyzers have been upgraded from Info to Warning by default: + +- MSTEST0001, MSTEST0007, MSTEST0017, MSTEST0023, MSTEST0024, MSTEST0025 +- MSTEST0030, MSTEST0031, MSTEST0032, MSTEST0035, MSTEST0037, MSTEST0045 + +Review and fix any new warnings, or suppress them in `.editorconfig` if intentional. + +### Step 5: Verify + +1. Run `dotnet build` -- confirm zero errors and review any new warnings +2. Run `dotnet test` -- confirm all tests pass +3. Compare test results (pass/fail counts) to the pre-migration baseline +4. If using Azure DevOps test tracking, be aware that `TestCase.Id` changes may affect history continuity +5. Check that no tests were silently dropped due to stricter discovery + +## Validation + +- [ ] All MSTest packages updated to 4.x +- [ ] Project builds with zero errors +- [ ] All tests pass with `dotnet test` +- [ ] Custom `TestMethodAttribute` subclasses updated for `ExecuteAsync` and CallerInfo +- [ ] `ExpectedExceptionAttribute` replaced with `Assert.ThrowsExactly` +- [ ] `Assert.ThrowsException` replaced with `Assert.ThrowsExactly` (or `Assert.Throws`) +- [ ] `ClassCleanupBehavior` enum usages removed +- [ ] `TestContext.Properties.Contains` updated to `ContainsKey` +- [ ] All target frameworks are net8.0+, net9.0, net462+, uap10.0.16299, or WinUI +- [ ] Behavioral changes reviewed and addressed +- [ ] No tests were lost during migration (compare test counts) + +## Related Skills + +- `writing-mstest-tests` -- for modern MSTest v4 assertion APIs and test authoring best practices +- `run-tests` -- for running tests after migration + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Custom `TestMethodAttribute` still overrides `Execute` | Change to `ExecuteAsync` returning `Task` | +| `TestMethodAttribute("display name")` no longer compiles | Use `TestMethodAttribute(DisplayName = "display name")` | +| `ClassCleanupBehavior` enum not found | Remove the enum argument; `[ClassCleanup]` now always runs at end of class. For end-of-assembly cleanup, use `[AssemblyCleanup]` | +| `TestContext.Properties.Contains` missing | Use `ContainsKey` -- `Properties` is now `IDictionary` | +| `ExpectedException` attribute not found | Replace with `Assert.ThrowsExactly(() => ...)` inside the test body | +| `Assert.ThrowsException` not found | Replace with `Assert.ThrowsExactly` (or `Assert.Throws` for derived types) | +| `Assert.AreEqual` with format string args fails | Use string interpolation: `$"message {value}"` | +| Tests hang that didn't before | AppDomain is disabled by default; on .NET Fx in testhost it is re-enabled automatically | +| Azure DevOps test history breaks | Expected -- `TestCase.Id` generation changed; no code fix, results will re-baseline | +| Discovery warnings now fail the run | `TreatDiscoveryWarningsAsErrors` is true by default; fix the discovery warnings | +| Net6.0/net7.0 targets don't compile | Update to net8.0 -- MSTest v4 supports net8.0, net9.0, net462, uap10.0.16299, modern UWP, and WinUI | diff --git a/.agents/skills/migrate-static-to-wrapper/SKILL.md b/.agents/skills/migrate-static-to-wrapper/SKILL.md new file mode 100644 index 0000000000..773c0c410c --- /dev/null +++ b/.agents/skills/migrate-static-to-wrapper/SKILL.md @@ -0,0 +1,178 @@ +--- +name: migrate-static-to-wrapper +description: > + Mechanically replace static dependency call sites with wrapper or built-in + abstraction calls across a bounded scope (file, project, or namespace). + Performs codemod-style bulk replacement of DateTime.UtcNow to TimeProvider.GetUtcNow(), + File.ReadAllText to IFileSystem, and similar transformations. Adds constructor + injection parameters and updates DI registration. + USE FOR: replace DateTime.UtcNow with TimeProvider, replace DateTime.Now with + TimeProvider, migrate static calls to wrapper, bulk replace File.* with IFileSystem, + codemod static to injectable, add constructor injection for time provider, + mechanical migration of statics, refactor DateTime to TimeProvider, swap static + for injected dependency, convert static calls to use abstraction, replace statics + in a class, migrate one file to TimeProvider, scoped migration, update call sites. + DO NOT USE FOR: detecting statics (use detect-static-dependencies), generating + wrappers (use generate-testability-wrappers), migrating between test frameworks. +--- + +# Migrate Static to Wrapper + +Perform mechanical, codemod-style replacement of static dependency call sites with calls to injected wrapper interfaces or built-in abstractions. Operates on a bounded scope (single file, project, or namespace) so migrations can be done incrementally. + +## When to Use + +- After wrappers have been generated (via `generate-testability-wrappers`) or built-in abstractions identified +- Migrating `DateTime.UtcNow` → `TimeProvider.GetUtcNow()` across a project +- Migrating `File.*` → `IFileSystem.File.*` across a namespace +- Adding constructor injection for the new abstraction to affected classes +- Incremental migration: one project or namespace at a time + +## When Not to Use + +- No wrapper or abstraction exists yet (use `generate-testability-wrappers` first) +- The user wants to detect statics, not migrate them (use `detect-static-dependencies`) +- The code does not use dependency injection and the user hasn't chosen ambient context +- Migrating between test frameworks (use the appropriate migration skill) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Static pattern | Yes | What to replace (e.g., `DateTime.UtcNow`, `File.ReadAllText`) | +| Replacement abstraction | Yes | What to use instead (e.g., `TimeProvider`, `IFileSystem`) | +| Scope | Yes | File path, project (.csproj), namespace, or directory to migrate | +| Injection strategy | No | `constructor` (default), `primary-constructor`, or `ambient` | + +## Workflow + +### Step 1: Verify prerequisites + +Before modifying any code: + +1. **Confirm the wrapper/abstraction exists**: Check that the interface or built-in abstraction is available in the project. For `TimeProvider`, verify the target framework is .NET 8+ or `Microsoft.Bcl.TimeProvider` is referenced. For `System.IO.Abstractions`, verify the NuGet package is referenced. + +2. **Confirm DI registration exists**: Check `Program.cs` or `Startup.cs` for the service registration. If missing, add it before proceeding. + +3. **Identify all files in scope**: List the `.cs` files that will be modified. Exclude test projects, `obj/`, `bin/`, and generated code. + +### Step 2: Plan the migration for each file + +For each file containing the static pattern, determine: + +1. **Which class(es) contain the call sites** — identify the class declarations +2. **Whether the class already has the dependency injected** — check constructors for existing `TimeProvider`, `IFileSystem`, etc. parameters +3. **The replacement expression** for each call site + +#### Replacement mapping + +| Category | Original | DI replacement | +|----------|----------|----------------| +| Time | `DateTime.Now` | `_timeProvider.GetLocalNow().DateTime` | +| Time | `DateTime.UtcNow` | `_timeProvider.GetUtcNow().DateTime` | +| Time | `DateTime.Today` | `_timeProvider.GetLocalNow().Date` | +| Time | `DateTimeOffset.UtcNow` | `_timeProvider.GetUtcNow()` | +| File | `File.ReadAllText(path)` | `_fileSystem.File.ReadAllText(path)` | +| File | `File.WriteAllText(path, text)` | `_fileSystem.File.WriteAllText(path, text)` | +| File | `File.Exists(path)` | `_fileSystem.File.Exists(path)` | +| File | `Directory.Exists(path)` | `_fileSystem.Directory.Exists(path)` | +| Env | `Environment.GetEnvironmentVariable(name)` | `_env.GetEnvironmentVariable(name)` | +| Console | `Console.WriteLine(msg)` | `_console.WriteLine(msg)` | +| Process | `Process.Start(info)` | `_processRunner.Start(info)` | + +Apply the same pattern for other members in each category. + +### Step 3: Add constructor injection + +Add the new dependency following the class's existing pattern: + +- **Primary constructor** (C# 12+): Add parameter to primary constructor: `public class OrderProcessor(ILogger logger, TimeProvider timeProvider)` +- **Traditional constructor**: Add `private readonly` field + constructor parameter, matching the existing field naming convention (`_camelCase` or `m_camelCase`) + +### Step 4: Replace call sites + +Perform each replacement mechanically. For each call site: + +1. Replace the static call with the wrapper call +2. Preserve the surrounding code structure (whitespace, comments, chaining) +3. Add required `using` directives if not already present + +#### Adding using directives + +| Abstraction | Using directive | +|------------|-----------------| +| `TimeProvider` | None (in `System` namespace) | +| `IFileSystem` | `using System.IO.Abstractions;` | +| `IHttpClientFactory` | `using System.Net.Http;` (usually already present) | +| Custom wrappers | `using ;` | + +### Step 5: Update affected test files + +If test files exist for the migrated classes: + +1. **Update constructor calls** — add the new parameter to test class instantiation +2. **Use test doubles**: + - `TimeProvider` → `new FakeTimeProvider()` from `Microsoft.Extensions.TimeProvider.Testing` + - `IFileSystem` → `new MockFileSystem()` from `System.IO.Abstractions.TestingHelpers` + - Custom wrappers → `new Mock()` or hand-rolled fake + +### Step 6: Build verification + +After all changes in the current scope: + +```bash +dotnet build +``` + +If the build fails: +- **Missing using**: Add the required `using` directive +- **Missing NuGet package**: Run `dotnet add package ` +- **Constructor mismatch in tests**: Update test instantiation (Step 5) +- **Ambiguous call**: Fully qualify the wrapper call + +### Step 7: Report changes + +Summarize what was done: + +``` +## Migration Summary + +**Pattern**: DateTime.UtcNow → TimeProvider.GetUtcNow() +**Scope**: MyProject/Services/ + +### Files Modified (production) +| File | Call Sites Replaced | Injection Added | +|------|--------------------:|:----------------| +| OrderProcessor.cs | 3 | Yes (constructor) | +| NotificationService.cs | 1 | Yes (primary ctor) | + +### Files Modified (tests) +| File | Change | +|------|--------| +| OrderProcessorTests.cs | Added FakeTimeProvider parameter | + +### Remaining (out of scope) +- MyProject/Legacy/ — 8 call sites not migrated (different namespace) +``` + +## Validation + +- [ ] All call sites in scope were replaced (none missed) +- [ ] Constructor injection added to all affected classes +- [ ] Field naming follows existing class conventions +- [ ] Required `using` directives added +- [ ] Required NuGet packages referenced +- [ ] Build succeeds after migration +- [ ] Test files updated with appropriate test doubles +- [ ] No behavioral changes introduced (wrapper delegates directly to the static) + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Replacing statics in test code | Only replace in production code; tests should use fakes/mocks | +| Breaking static classes | Static classes can't have constructors — use ambient context for these | +| Missing `FakeTimeProvider` NuGet | Add `Microsoft.Extensions.TimeProvider.Testing` to test project | +| Replacing in expression-bodied members without updating return type | `DateTime` → `DateTimeOffset` when using `TimeProvider.GetUtcNow()` — verify type compatibility | +| Migrating too much at once | Stick to the defined scope — one project or namespace per run | +| Forgetting DI registration | Always verify `Program.cs`/`Startup.cs` has the registration before replacing call sites | diff --git a/.agents/skills/migrate-vstest-to-mtp/SKILL.md b/.agents/skills/migrate-vstest-to-mtp/SKILL.md new file mode 100644 index 0000000000..47dddc8cc2 --- /dev/null +++ b/.agents/skills/migrate-vstest-to-mtp/SKILL.md @@ -0,0 +1,351 @@ +--- +name: migrate-vstest-to-mtp +description: > + Migrates .NET test projects from VSTest to Microsoft.Testing.Platform (MTP). + Use when user asks to "migrate to MTP", "switch from VSTest", "enable + Microsoft.Testing.Platform", "use MTP runner", or mentions EnableMSTestRunner, + EnableNUnitRunner, UseMicrosoftTestingPlatformRunner, or dotnet test exit + code 8. Supports MSTest, NUnit, xUnit.net v2 (via YTest.MTP.XUnit2), and + xUnit.net v3 (native MTP). Also covers translating xUnit.net v3 MTP filter + syntax (--filter-class, --filter-trait, --filter-query). + Covers runner enablement, CLI argument translation, Directory.Build.props + and global.json configuration, CI/CD pipeline updates, and MTP extension + packages. DO NOT USE FOR: migrating between test frameworks + (MSTest/xUnit/NUnit), xUnit.net v2 to v3 API migration, MSTest version + upgrades (use migrate-mstest-* skills), TFM upgrades, or UWP/WinUI test + projects. +--- + +# VSTest -> Microsoft.Testing.Platform Migration + +Migrate a .NET test solution from VSTest to Microsoft.Testing.Platform (MTP). The outcome is a solution where all test projects run on MTP, `dotnet test` works correctly, and CI/CD pipelines are updated. + +> **Important**: Do not mix VSTest-based and MTP-based .NET test projects in the same solution or run configuration -- this is an unsupported scenario. + +## When to Use + +- Switching from VSTest to Microsoft.Testing.Platform for any supported test framework +- Enabling `dotnet run` / `dotnet watch` / direct executable execution for test projects +- Enabling Native AOT or trimmed test execution +- Replacing `vstest.console.exe` with `dotnet test` on MTP +- Updating CI/CD pipelines from the VSTest task to the .NET Core CLI task +- Updating `dotnet test` arguments from VSTest syntax to MTP syntax + +## When Not to Use + +- The project already runs on Microsoft.Testing.Platform -- migration is done +- Migrating between test frameworks (e.g., MSTest to xUnit.net) -- different effort entirely +- The project builds UWP or packaged WinUI test projects -- MTP does not support these yet +- The solution mixes .NET and non-.NET test adapters (e.g., JavaScript or C++ adapters) -- VSTest is required +- Upgrading MSTest versions -- use `migrate-mstest-v1v2-to-v3` or `migrate-mstest-v3-to-v4` + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Project or solution path | Yes | The `.csproj`, `.sln`, or `.slnx` entry point containing test projects | +| Test framework | No | MSTest, NUnit, xUnit.net v2, or xUnit.net v3. Auto-detected from package references | +| .NET SDK version | No | Determines `dotnet test` integration mode. Auto-detected via `dotnet --version` | +| CI/CD pipeline files | No | Paths to pipeline definitions that invoke `vstest.console` or `dotnet test` | + +## Workflow + +### Step 1: Assess the solution + +1. Identify the test framework for each test project -- see the `platform-detection` skill for the package-to-framework mapping. Key indicators: + - **MSTest**: References `MSTest` or `MSTest.TestAdapter`, or uses `MSTest.Sdk` (with `` not set to `false`). Note: `MSTest.TestFramework` alone is a library dependency, not a test project. + - **NUnit**: References `NUnit3TestAdapter` + - **xUnit.net**: References `xunit` and `xunit.runner.visualstudio` +2. Check the .NET SDK version (`dotnet --version`) -- this determines how `dotnet test` integrates with MTP +3. Check whether a `Directory.Build.props` file exists at the solution or repo root -- all MTP properties should go there for consistency +4. Check for `vstest.console.exe` usage in CI scripts or pipeline definitions +5. Check for VSTest-specific `dotnet test` arguments in CI scripts: `--filter`, `--logger`, `--collect`, `--settings`, `--blame*` +6. Run `dotnet test` to establish a baseline of test pass/fail counts + +### Step 2: Set up Directory.Build.props + +> **Critical**: Set MTP runner properties in `Directory.Build.props` at the solution or repo root whenever possible, rather than per-project. This prevents inconsistent configuration where some projects use VSTest and others use MTP (an unsupported scenario). +> **Note**: MTP also requires test projects to have `Exe`. Only `MSTest.Sdk` sets this automatically. For all other setups (MSTest NuGet packages with `EnableMSTestRunner`, NUnit with `EnableNUnitRunner`, xUnit.net with `YTest.MTP.XUnit2`), prefer setting `Exe` centrally in `Directory.Build.props` with a condition that targets only test projects. If you cannot reliably target only test projects from `Directory.Build.props`, setting `Exe` per-project is an acceptable exception. +> +> **Conditioning in `Directory.Build.props`**: Do NOT use `Condition="'$(IsTestProject)' == 'true'"` -- `IsTestProject` is set by the test SDK targets later in evaluation and is not available when `Directory.Build.props` is imported. Use a property that is available early, such as `MSBuildProjectName`, to target test projects by naming convention. For example, if all test projects end in `.Tests`: +> +> ```xml +> +> Exe +> +> ``` +> +> Adjust the condition (e.g., `.EndsWith('Tests')`, `.Contains('.Test')`) to match the test project naming convention used in the repository. + +### Step 3: Enable the framework-specific MTP runner + +Each framework has its own opt-in property. Add these in `Directory.Build.props` for consistency. + +#### MSTest + +**Option A -- MSTest NuGet packages (3.2.0+):** + +```xml + + true + Exe + +``` + +Ensure the project references MSTest 3.2.0 or later. If the version is already 3.2.0+, no MSTest version upgrade is needed for MTP migration. + +**Option B -- MSTest.Sdk:** + +When using `MSTest.Sdk`, MTP is enabled by default -- no `EnableMSTestRunner` or `OutputType Exe` property is needed (the SDK sets both automatically). The only action is: if the project has `true`, **remove it**. That property forces the project to use VSTest instead of MTP. + +#### NUnit + +Requires `NUnit3TestAdapter` **5.0.0** or later. + +1. Update `NUnit3TestAdapter` to 5.0.0+: + +```xml + +``` + +1. Enable the NUnit runner: + +```xml + + true + Exe + +``` + +#### xUnit.net + +Add a reference to `YTest.MTP.XUnit2` -- this package provides MTP support for xUnit.net v2 projects without requiring an upgrade to xunit.v3. You must also set `OutputType` to `Exe`: + +```xml + +``` + +```xml + + Exe + +``` + +> **Note**: `YTest.MTP.XUnit2` preserves the VSTest `--filter` syntax, so no filter migration is needed for xUnit.net v2. It also supports `--settings` for runsettings (xunit-specific configurations only), `xunit.runner.json`, TRX reporting via `--report-trx`, and `--treenode-filter`. + +#### xUnit.net v3 + +xUnit.net v3 (`xunit.v3` package) has built-in MTP support. Enable it with: + +```xml + + true + +``` + +> **Important**: xUnit.net v3 on MTP does NOT support the VSTest `--filter` syntax. You must translate filters to xUnit.net v3's native filter options (see Step 5). + +### Step 4: Configure dotnet test integration + +The `dotnet test` integration depends on the .NET SDK version. + +#### .NET 10 SDK and later (recommended) + +Use the native MTP mode by adding a `test` section to `global.json`: + +```json +{ + "sdk": { + "version": "10.0.100" + }, + "test": { + "runner": "Microsoft.Testing.Platform" + } +} +``` + +In this mode, `dotnet test` arguments are passed directly -- for example, `dotnet test --report-trx`. + +> **Important**: `global.json` does not support trailing commas. Ensure the JSON is strictly valid. + +#### .NET 9 SDK and earlier + +Use the VSTest mode of `dotnet test` command to run MTP test projects by adding this property in `Directory.Build.props`: + +```xml + + true + +``` + +> **Important**: In this mode, you must use `--` to separate `dotnet test` build arguments from MTP arguments. For example: `dotnet test --no-build -- --list-tests`. + +### Step 5: Update dotnet test command-line arguments + +VSTest-specific arguments must be translated to MTP equivalents. Build-related arguments (`-c`, `-f`, `--no-build`, `--nologo`, `-v`, etc.) are unchanged. + +| VSTest argument | MTP equivalent | Notes | +|-----------------|----------------|-------| +| `--test-adapter-path` | Not applicable | MTP does not use external adapter discovery | +| `--blame` | Not applicable | | +| `--blame-crash` | `--crashdump` | Requires `Microsoft.Testing.Extensions.CrashDump` NuGet package | +| `--blame-crash-dump-type ` | `--crashdump-type ` | Requires CrashDump extension | +| `--blame-hang` | `--hangdump` | Requires `Microsoft.Testing.Extensions.HangDump` NuGet package | +| `--blame-hang-dump-type ` | `--hangdump-type ` | Requires HangDump extension | +| `--blame-hang-timeout ` | `--hangdump-timeout ` | Requires HangDump extension | +| `--collect "Code Coverage;Format=cobertura"` | `--coverage --coverage-output-format cobertura` | Per-extension arguments | +| `-d\|--diag ` | `--diagnostic` | | +| `--filter ` | `--filter ` | Same syntax for MSTest, NUnit, and xUnit.net v2 (with `YTest.MTP.XUnit2`). For xUnit.net v3, see filter migration below | +| `-l\|--logger trx` | `--report-trx` | Requires `Microsoft.Testing.Extensions.TrxReport` NuGet package | +| `--results-directory ` | `--results-directory ` | Same | +| `-s\|--settings ` | `--settings ` | MSTest and NUnit still support `.runsettings` | +| `-t\|--list-tests` | `--list-tests` | Same | +| `-- ` | `--test-parameter` | Applicable only to MSTest and NUnit | + +#### Filter migration + +**MSTest, NUnit, and xUnit.net v2 (with `YTest.MTP.XUnit2`)**: The VSTest `--filter` syntax is identical on both VSTest and MTP. No changes needed. + +**xUnit.net v3 (native MTP)**: xUnit.net v3 does NOT support the VSTest `--filter` syntax on MTP. See the **VSTest → MTP filter translation** section in the `filter-syntax` skill for the complete translation table. Key translation example: + +```shell +# VSTest +dotnet test --filter "FullyQualifiedName~IntegrationTests&Category=Smoke" + +# xUnit.net v3 MTP -- using individual filters (AND behavior) +dotnet test -- --filter-class *IntegrationTests* --filter-trait "Category=Smoke" + +# xUnit.net v3 MTP -- using query language (assembly/namespace/class/method[trait]) +dotnet test -- --filter-query "/*/*/*IntegrationTests*/*[Category=Smoke]" +``` + +> **Note**: When combining `--filter-class` and `--filter-trait`, both conditions must match (AND behavior). For complex expressions, use `--filter-query` with the path-segment syntax. See the [xUnit.net query filter language docs](https://xunit.net/docs/query-filter-language) for full reference. + +### Step 6: Install MTP extension packages (if needed) + +If CI scripts use TRX reporting, crash dumps, or hang dumps, add the corresponding NuGet packages: + +```xml + + + + + + + + + + + +``` + +### Step 7: Update CI/CD pipelines + +#### Azure DevOps + +**If using the VSTest task (`VSTest@3`)**: Replace with the .NET Core CLI task (`DotNetCoreCLI@2`): + +```yaml +# Before (VSTest task) +- task: VSTest@3 + inputs: + testAssemblyVer2: '**/*Tests.dll' + runSettingsFile: 'test.runsettings' + +# After (.NET Core CLI task) +- task: DotNetCoreCLI@2 + displayName: Run tests + inputs: + command: 'test' + arguments: '--no-build --configuration Release' +``` + +**If already using DotNetCoreCLI@2**: Update arguments per Step 5 translations. Remember the `--` separator on .NET 9 and earlier: + +```yaml +- task: DotNetCoreCLI@2 + displayName: Run tests + inputs: + command: 'test' + arguments: '--no-build -- --report-trx --results-directory $(Agent.TempDirectory)' +``` + +#### GitHub Actions + +Update `dotnet test` invocations in workflow files with the same argument translations from Step 5. + +#### Replace vstest.console.exe + +If any script invokes `vstest.console.exe` directly, replace it with `dotnet test`. The test projects are now executables and can also be run directly. + +### Step 8: Handle behavioral differences + +#### Zero tests exit code + +VSTest silently succeeds when zero tests are discovered. MTP fails with **exit code 8**. Options: + +- Pass `--ignore-exit-code 8` when running tests +- Add to `Directory.Build.props`: + +```xml + + $(TestingPlatformCommandLineArguments) --ignore-exit-code 8 + +``` + +- Use environment variable: `TESTINGPLATFORM_EXITCODE_IGNORE=8` + +### Step 9: Remove VSTest-only packages (optional) + +Once migration is complete and verified, remove packages that are only needed for VSTest: + +- `Microsoft.NET.Test.Sdk` -- not needed for MTP (MSTest.Sdk v4 already omits it by default) +- `xunit.runner.visualstudio` -- only needed for VSTest discovery of xUnit.net (not needed when using `YTest.MTP.XUnit2`) +- `NUnit3TestAdapter` VSTest-only features -- the adapter is still needed but only for the MTP runner + +> **Note**: If you need to maintain VSTest compatibility during a transition period, keep these packages. + +### Step 10: Verify + +1. Run `dotnet build` -- confirm zero errors +2. Run `dotnet test` -- confirm all tests pass +3. Compare test pass/fail counts to the pre-migration baseline +4. Run the test executable directly (e.g., `./bin/Debug/net8.0/MyTests.exe`) -- confirm it works +5. Verify CI pipeline produces the expected test result artifacts (TRX files, code coverage, crash dumps) +6. Test that Test Explorer in Visual Studio (17.14+) or VS Code discovers and runs tests + +## Validation + +- [ ] All test projects use MTP runner (no VSTest-only configuration remains) +- [ ] `dotnet build` completes with zero errors +- [ ] `dotnet test` passes all tests and test counts match pre-migration baseline +- [ ] Test executable runs directly (e.g., `./bin/Debug/net8.0/MyTests.exe`) +- [ ] CI pipeline produces expected test result artifacts (TRX files, code coverage, crash dumps) +- [ ] Test Explorer in Visual Studio or VS Code discovers and runs tests +- [ ] No `vstest.console.exe` invocations remain in CI scripts +- [ ] `Exe` is set for all non-MSTest.Sdk test projects + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Mixing VSTest and MTP projects in the same solution | Migrate all test projects together -- mixed mode is unsupported | +| `dotnet test` arguments ignored on .NET 9 and earlier | Use `--` to separate build args from MTP args: `dotnet test -- --report-trx` | +| Exit code 8 on CI without failures | MTP fails when zero tests run; use `--ignore-exit-code 8` or fix test discovery | +| MSTest.Sdk v4 + vstest.console no longer works | MSTest.Sdk v4 no longer adds `Microsoft.NET.Test.Sdk` -- add it explicitly or switch to `dotnet test` | +| Missing `Exe` | Required for all setups except MSTest.Sdk (which sets it automatically) | +| Using `Condition="'$(IsTestProject)' == 'true'"` in `Directory.Build.props` | `IsTestProject` is not yet defined when `Directory.Build.props` is evaluated -- use `$(MSBuildProjectName.EndsWith('.Tests'))` (or a similar name-based check) instead | + +## Next Steps + +- Use `run-tests` for running tests on the new MTP platform +- Use `mtp-hot-reload` for iterative test fixing with hot reload on MTP + +## More Info + +- [Test platforms overview](https://learn.microsoft.com/dotnet/core/testing/test-platforms-overview) +- [Migrate from VSTest to Microsoft.Testing.Platform](https://learn.microsoft.com/dotnet/core/testing/migrating-vstest-microsoft-testing-platform) +- [Microsoft.Testing.Platform overview](https://learn.microsoft.com/dotnet/core/testing/microsoft-testing-platform-intro) +- [Testing with dotnet test](https://learn.microsoft.com/dotnet/core/testing/unit-testing-with-dotnet-test) +- [Microsoft.Testing.Platform CLI options](https://learn.microsoft.com/dotnet/core/testing/microsoft-testing-platform-cli-options) +- [Microsoft.Testing.Platform extensions](https://learn.microsoft.com/dotnet/core/testing/unit-testing-platform-extensions) diff --git a/.agents/skills/migrate-xunit-to-xunit-v3/SKILL.md b/.agents/skills/migrate-xunit-to-xunit-v3/SKILL.md new file mode 100644 index 0000000000..d87323e803 --- /dev/null +++ b/.agents/skills/migrate-xunit-to-xunit-v3/SKILL.md @@ -0,0 +1,219 @@ +--- +name: migrate-xunit-to-xunit-v3 +description: > + Migrates .NET test projects from xUnit.net v2 to xUnit.net v3. + USE FOR: upgrading xunit to xunit.v3. + DO NOT USE FOR: migrating between test frameworks (MSTest/NUnit to + xUnit.net), migrating from VSTest to Microsoft.Testing.Platform + (use migrate-vstest-to-mtp). +--- + +# xunit.v3 Migration + +Migrate .NET test projects from xUnit.net v2 to xUnit.net v3. The outcome is a solution where all test projects reference `xunit.v3.*` packages, compiles cleanly, and all tests pass with the same results as before migration. + +## When to Use + +- Upgrading test projects from `xunit` (v2) packages to `xunit.v3` +- Resolving compilation errors after updating xunit package references to v3 + +## When Not to Use + +- Migrating between test frameworks (e.g., MSTest or NUnit to xUnit.net) — different effort entirely +- Migrating from VSTest to Microsoft.Testing.Platform — use `migrate-vstest-to-mtp` +- The projects already reference `xunit.v3` — migration is done + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Test project or solution | Yes | The .NET project or solution containing xUnit.net v2 test projects | + +## Workflow + +> **Commit strategy:** Commit after each major step so the migration is reviewable and bisectable. Separate project file changes from code changes. + +### Step 1: Identify xUnit.net projects + +Search for test projects referencing xUnit.net v2 packages: + +- `xunit` +- `xunit.abstractions` +- `xunit.assert` +- `xunit.core` +- `xunit.extensibility.core` +- `xunit.extensibility.execution` +- `xunit.runner.visualstudio` + +Make sure to check the package references in project files, MSBuild props and targets files, like `Directory.Build.props`, `Directory.Build.targets`, and `Directory.Packages.props`. + +### Step 2: Verify compatibility + +1. Verify target framework compatibility: xUnit.net v3 requires **.NET 8+** or **.NET Framework 4.7.2+**. For test library projects, .NET Standard 2.0 is also supported. +2. If any of the test projects have non-compatible target frameworks, STOP here and DON'T do anything. Only tell the user to upgrade the target framework first before migrating xUnit.net. +3. Verify project compatibility: xUnit.net v3 only supports SDK-style projects. If any test projects are non-SDK-style, STOP here and DON'T do anything. Only tell the user to migrate to SDK-style projects first before migrating xUnit.net. + +### Step 3: Establish a baseline + +Run `dotnet test` to establish a baseline of test pass/fail counts. When running `dotnet test`, ensure that: + +- You run `dotnet test` without any additional arguments (i.e., don't pass `--no-restore` or `--no-build`). +- Ensure you redirect the command output to a file and read the output from that file. + +### Step 4: Update package references + +1. Update any `PackageReference` or `PackageVersion` items for the new package names, based on the following mapping: + + - `xunit` → `xunit.v3` + - `xunit.abstractions` → Remove entirely + - `xunit.assert` → `xunit.v3.assert` + - `xunit.core` → `xunit.v3.core` + - `xunit.extensibility.core` and `xunit.extensibility.execution` → `xunit.v3.extensibility.core` (if both are referenced in a project consolidate to only a single entry as the two packages are merged) + +2. Update all `xunit.v3.*` packages to the latest correct version available on NuGet. Also update `xunit.runner.visualstudio` to the latest version. + +### Step 5: Set `OutputType` to `Exe` + +In each test project (excluding test library projects), set `OutputType` to `Exe` in the project file: + +```xml + + Exe + +``` + +Depending on the solution in hand, there might be a centralized place where this can be added. For example: + +- If all test projects share (or can share) a common `Directory.Build.props`, add the `Exe` property there. Note that the OutputType should not be added to `Directory.Build.targets`. +- If all test projects share a name pattern (e.g., `*.Tests.csproj`), add a conditional property group in `Directory.Build.props` that applies only to those projects, like `Exe`. Adjust the condition as needed to target only test projects. +- Otherwise, add the `Exe` property to each test project file individually. + +### Step 6: Remove `Xunit.Abstractions` usings + +Find any `using Xunit.Abstractions;` directives in C# files and remove them completely. + +### Step 7: Address `async void` breaking change + +In xUnit.net v3, `async void` test methods are no longer supported and will fail to compile. Search for any test methods declared with `async void` and change them to `async Task`. Test methods can be identified via the `[Fact]` or `[Theory]` attributes or other test attributes. + +### Step 8: Address breaking change of attributes + +In xUnit.net v3, some attributes were updated so that they accept a `System.Type` instead of two strings (fully qualified type name and assembly name). These attributes are: + +- `CollectionBehaviorAttribute` +- `TestCaseOrdererAttribute` +- `TestCollectionOrdererAttribute` +- `TestFrameworkAttribute` + +For example, `[assembly: CollectionBehavior("MyNamespace.MyCollectionFactory", "MyAssembly")]` must be converted to `[assembly: CollectionBehavior(typeof(MyNamespace.MyCollectionFactory))]`. + +### Step 9: Inheriting from FactAttribute or TheoryAttribute + +Identify if there are any custom attributes that inherit from `FactAttribute` or `TheoryAttribute`. These custom user-defined attributes must now provide source information. For example, if the attribute looked like this: + +```csharp +internal sealed class MyFactAttribute : FactAttribute +{ + public MyFactAttribute() + { + } +} +``` + +it must be changed to this: + +```csharp +internal sealed class MyFactAttribute : FactAttribute +{ + public MyFactAttribute( + [CallerFilePath] string? sourceFilePath = null, + [CallerLineNumber] int sourceLineNumber = -1 + ) : base(sourceFilePath, sourceLineNumber) + { + } +} +``` + +### Step 10: Inheriting from BeforeAfterTestAttribute + +Identify if there are any custom attributes that inherit from `BeforeAfterTestAttribute`. These custom user-defined attributes must update their method signatures. Previously, they would have `Before`/`After` overrides that look like this: + +```csharp + public override void Before(MethodInfo methodUnderTest) + { + // Possibly some custom logic here + base.Before(methodUnderTest); + // Possibly some custom logic here + } + + public override void After(MethodInfo methodUnderTest) + { + // Possibly some custom logic here + base.After(methodUnderTest); + // Possibly some custom logic here + } +``` + +it must be changed to this: + +```csharp + public override void Before(MethodInfo methodUnderTest, IXunitTest test) + { + // Possibly some custom logic here + base.Before(methodUnderTest, test); + // Possibly some custom logic here + } + + public override void After(MethodInfo methodUnderTest, IXunitTest test) + { + // Possibly some custom logic here + base.After(methodUnderTest, test); + // Possibly some custom logic here + } +``` + +### Step 11: Address new xUnit analyzer warnings + +xunit.v3 introduced new analyzer warnings. You should attempt to address them. + +One of the most notable warnings is [xUnit1051: Calls to methods which accept CancellationToken should use TestContext.Current.CancellationToken](https://xunit.net/xunit.analyzers/rules/xUnit1051). Identify the calls to such methods, if any, and pass the cancellation token. + +### Step 12: Test platform selection + +You should keep the same test platform that was used with xunit 2. + +Note that xunit 2 is always VSTest except if the user used YTest.MTP.XUnit2. + +- If user had a reference to YTest.MTP.XUnit2: + - Remove the reference to YTest.MTP.XUnit2 completely. + - Add `true` to Directory.Build.props under an unconditional PropertyGroup. +- If user didn't have a reference to YTest.MTP.XUnit2: + - Add `false` to Directory.Build.props under an unconditional PropertyGroup. + +### Step 13: Migrate `Xunit.SkippableFact` + +If there are any package references to `Xunit.SkippableFact`, remove all these package references entirely. + +Then, follow these steps to eliminate usages of APIs coming from the removed package reference: + +- Update any `SkippableFact` attribute to the regular `Fact` attribute. +- Update any `SkippableTheory` attribute to the regular `Theory` attribute. +- Change `Skip.If` method calls to `Assert.SkipWhen`. +- Change `Skip.IfNot` method calls to `Assert.SkipUnless`. + +### Step 14: Update `Xunit.Combinatorial` NuGet package + +Find package references of `Xunit.Combinatorial` and update them from 1.x to the latest 2.x version available. + +### Step 15: Update `Xunit.StaFact` NuGet package + +Find package references of `Xunit.StaFact` and update them from 1.x to the latest 3.x version available. + +### Step 16: Build the solution + +Now, build the solution to identify any remaining compilation errors that might not have been addressed by previous instructions. +Fix any straightforward errors that show up, and keep iterating and fixing more. + +You can also look into and to help with the remaining compilation errors. + +You can fix as much as you can, and it's okay if not everything is fixed. Just tell the user that there are remaining errors that need to be manually addressed. diff --git a/.agents/skills/msbuild-antipatterns/SKILL.md b/.agents/skills/msbuild-antipatterns/SKILL.md new file mode 100644 index 0000000000..a531a7f54f --- /dev/null +++ b/.agents/skills/msbuild-antipatterns/SKILL.md @@ -0,0 +1,387 @@ +--- +name: msbuild-antipatterns +description: "Catalog of MSBuild anti-patterns with detection rules and fix recipes. Only activate in MSBuild/.NET build context. USE FOR: reviewing, auditing, or cleaning up .csproj, .vbproj, .fsproj, .props, .targets, or .proj files. Each anti-pattern has a symptom, explanation, and concrete BAD→GOOD transformation. Covers Exec-instead-of-built-in-task, unquoted conditions, hardcoded paths, restating SDK defaults, scattered package versions, and more. DO NOT USE FOR: non-MSBuild build systems (npm, Maven, CMake, etc.), project migration to SDK-style (use msbuild-modernization)." +--- + +# MSBuild Anti-Pattern Catalog + +A numbered catalog of common MSBuild anti-patterns. Each entry follows the format: + +- **Smell**: What to look for +- **Why it's bad**: Impact on builds, maintainability, or correctness +- **Fix**: Concrete transformation + +Use this catalog when scanning project files for improvements. + +--- + +## AP-01: `` for Operations That Have Built-in Tasks + +**Smell**: ``, ``, `` + +**Why it's bad**: Built-in tasks are cross-platform, support incremental build, emit structured logging, and handle errors consistently. `` is opaque to MSBuild. + +```xml + + + + + + + + + + + + + +``` + +**Built-in task alternatives:** + +| Shell Command | MSBuild Task | +|--------------|--------------| +| `mkdir` | `` | +| `copy` / `cp` | `` | +| `del` / `rm` | `` | +| `move` / `mv` | `` | +| `echo text > file` | `` | +| `touch` | `` | +| `xcopy /s` | `` with item globs | + +--- + +## AP-02: Unquoted Condition Expressions + +**Smell**: `Condition="$(Foo) == Bar"` — either side of a comparison is unquoted. + +**Why it's bad**: If the property is empty or contains spaces/special characters, the condition evaluates incorrectly or throws a parse error. MSBuild requires single-quoted strings for reliable comparisons. + +```xml + + + true + + + + + true + +``` + +**Rule**: Always quote **both** sides of `==` and `!=` comparisons with single quotes. + +--- + +## AP-03: Hardcoded Absolute Paths + +**Smell**: Paths like `C:\tools\`, `D:\packages\`, `/usr/local/bin/` in project files. + +**Why it's bad**: Breaks on other machines, CI environments, and other operating systems. Not relocatable. + +```xml + + + C:\tools\mytool\mytool.exe + + + + + + $(MSBuildThisFileDirectory)tools\mytool\mytool.exe + + +``` + +**Preferred path properties:** + +| Property | Meaning | +|----------|---------| +| `$(MSBuildThisFileDirectory)` | Directory of the current .props/.targets file | +| `$(MSBuildProjectDirectory)` | Directory of the .csproj | +| `$([MSBuild]::GetDirectoryNameOfFileAbove(...))` | Walk up to find a marker file | +| `$([MSBuild]::NormalizePath(...))` | Combine and normalize path segments | + +--- + +## AP-04: Restating SDK Defaults + +**Smell**: Properties set to values that the .NET SDK already provides by default. + +**Why it's bad**: Adds noise, hides intentional overrides, and makes it harder to identify what's actually customized. When defaults change in newer SDKs, the redundant properties may silently pin old behavior. + +```xml + + + Library + true + true + MyLib + MyLib + true + + + + + net8.0 + +``` + +--- + +## AP-05: Manual File Listing in SDK-Style Projects + +**Smell**: ``, `` in SDK-style projects. + +**Why it's bad**: SDK-style projects automatically glob `**/*.cs` (and other file types). Explicit listing is redundant, creates merge conflicts, and new files may be accidentally missed if not added to the list. + +```xml + + + + + + + + + + + +``` + +**Exception**: Non-SDK-style (legacy) projects require explicit file includes. If migrating, see `msbuild-modernization` skill. + +--- + +## AP-06: Using `` with HintPath for NuGet Packages + +**Smell**: `` + +**Why it's bad**: This is the legacy `packages.config` pattern. It doesn't support transitive dependencies, version conflict resolution, or automatic restore. The `packages/` folder must be committed or restored separately. + +```xml + + + + ..\packages\Newtonsoft.Json.13.0.3\lib\netstandard2.0\Newtonsoft.Json.dll + + + + + + + +``` + +**Note**: `` without HintPath is still valid for .NET Framework GAC assemblies like `WindowsBase`, `PresentationCore`, etc. + +--- + +## AP-07: Missing `PrivateAssets="all"` on Analyzer/Tool Packages + +**Smell**: `` without `PrivateAssets="all"`. + +**Why it's bad**: Without `PrivateAssets="all"`, analyzer and build-tool packages flow as transitive dependencies to consumers of your library. Consumers get unwanted analyzers or build-time tools they didn't ask for. + +See [`references/private-assets.md`](references/private-assets.md) for BAD/GOOD examples and the full list of packages that need this. + +--- + +## AP-08: Copy-Pasted Properties Across Multiple .csproj Files + +**Smell**: The same `` block appears in 3+ project files. + +**Why it's bad**: Maintenance burden — a change must be made in every file. Inconsistencies creep in over time. + +```xml + + + + latest + enable + true + enable + + + + + + + latest + enable + true + enable + + +``` + +See `directory-build-organization` skill for full guidance on structuring `Directory.Build.props` / `Directory.Build.targets`. + +--- + +## AP-09: Scattered Package Versions Without Central Package Management + +**Smell**: `` with different versions of the same package across projects. + +**Why it's bad**: Version drift — different projects use different versions of the same package, leading to runtime mismatches, unexpected behavior, or diamond dependency conflicts. + +```xml + + + + + +``` + +**Fix:** Use Central Package Management. See [https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management](https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management) for details. + +--- + +## AP-10: Monolithic Targets (Too Much in One Target) + +**Smell**: A single `` with 50+ lines doing multiple unrelated things. + +**Why it's bad**: Can't skip individual steps via incremental build, hard to debug, hard to extend, and the target name becomes meaningless. + +```xml + + + + + + + + + + + + + + + + + + + + + + +``` + +--- + +## AP-11: Custom Targets Missing `Inputs` and `Outputs` + +**Smell**: `` with no `Inputs` / `Outputs` attributes. + +**Why it's bad**: The target runs on every build, even when nothing changed. This defeats incremental build and slows down no-op builds. + +See [`references/incremental-build-inputs-outputs.md`](references/incremental-build-inputs-outputs.md) for BAD/GOOD examples and the full pattern including FileWrites registration. + +See `incremental-build` skill for deep guidance on Inputs/Outputs, FileWrites, and up-to-date checks. + +--- + +## AP-12: Setting Defaults in .targets Instead of .props + +**Smell**: `` with default values inside a `.targets` file. + +**Why it's bad**: `.targets` files are imported late (after project files). By the time they set defaults, other `.targets` files may have already used the empty/undefined value. `.props` files are imported early and are the correct place for defaults. + +```xml + + + 2.0 + + + + + + + + + 2.0 + + + + + + +``` + +**Rule**: `.props` = defaults and settings (evaluated early). `.targets` = build logic and targets (evaluated late). + +--- + +## AP-13: Import Without `Exists()` Guard + +**Smell**: `` without a `Condition="Exists('...')"` check. + +**Why it's bad**: If the file doesn't exist (not yet created, wrong path, deleted), the build fails with a confusing error. Optional imports should always be guarded. + +```xml + + + + + + + + +``` + +**Exception**: Imports that are *required* for the build to work correctly should fail fast — don't guard those. Guard imports that are optional or environment-specific (e.g., local developer overrides, CI-specific settings). + +--- + +## AP-14: Using Backslashes in Paths (Cross-Platform Issue) + +**Smell**: `` with backslash separators in `.props`/`.targets` files meant to be cross-platform. + +**Why it's bad**: Backslashes work on Windows but fail on Linux/macOS. MSBuild normalizes forward slashes on all platforms. + +```xml + + + + + + + +``` + +**Note**: `$(MSBuildThisFileDirectory)` already ends with a platform-appropriate separator, so `$(MSBuildThisFileDirectory)tools/mytool` works on both platforms. + +--- + +## AP-15: Unconditional Property Override in Multiple Scopes + +**Smell**: A property set unconditionally in both `Directory.Build.props` and a `.csproj` — last write wins silently. + +**Why it's bad**: Hard to trace which value is actually used. Makes the build fragile and confusing for anyone reading the project files. + +```xml + + + + bin\custom\ + + + + bin\other\ + + + + + + bin\custom\ + + +``` + +--- + +For additional anti-patterns (AP-16 through AP-21) and a quick-reference checklist, see [additional-antipatterns.md](references/additional-antipatterns.md). diff --git a/.agents/skills/msbuild-antipatterns/references/additional-antipatterns.md b/.agents/skills/msbuild-antipatterns/references/additional-antipatterns.md new file mode 100644 index 0000000000..53e9a63fa8 --- /dev/null +++ b/.agents/skills/msbuild-antipatterns/references/additional-antipatterns.md @@ -0,0 +1,200 @@ +## AP-16: Using `` for String/Path Operations + +**Smell**: `` or `` for simple string manipulation. + +**Why it's bad**: Shell-dependent, not cross-platform, slower than property functions, and the result is hard to capture back into MSBuild properties. + +```xml + + + + + + + + $(Version.Replace('-preview', '')) + $(Version.Contains('-')) + $(AssemblyName.ToLowerInvariant()) + + + + + $([MSBuild]::NormalizeDirectory($(OutputPath))) + $([System.IO.Path]::Combine($(MSBuildThisFileDirectory), 'tools', 'mytool.exe')) + +``` + +--- + +## AP-17: Mixing `Include` and `Update` for the Same Item Type in One ItemGroup + +**Smell**: Same `` has both `` and ``. + +**Why it's bad**: `Update` acts on items already in the set. If `Include` hasn't been processed yet (evaluation order), `Update` may not find the item. Separating them avoids subtle ordering bugs. + +```xml + + + + + + + + + + + + + +``` + +--- + +## AP-18: Redundant `` to Transitively-Referenced Projects + +**Smell**: A project references both `Core` and `Utils`, but `Core` already depends on `Utils`. + +**Why it's bad**: Adds unnecessary coupling, makes the dependency graph harder to understand, and can cause ordering issues in large builds. MSBuild resolves transitive references automatically. + +```xml + + + + + + + + + + +``` + +**Caveat**: If you need to use types from `Utils` directly (not just transitively), the explicit reference is appropriate. But verify whether the direct dependency is actually needed. + +--- + +## AP-19: Side Effects During Property Evaluation + +**Smell**: Property functions that write files, make network calls, or modify state during `` evaluation. + +**Why it's bad**: Property evaluation happens during the evaluation phase, which can run multiple times (e.g., during design-time builds in Visual Studio). Side effects are unpredictable and can corrupt state. + +```xml + + + $([System.IO.File]::WriteAllText('stamp.txt', 'built')) + + + + + + +``` + +--- + +## AP-20: Platform-Specific Exec Without OS Condition + +**Smell**: `` or `` without an OS condition. + +**Why it's bad**: Fails on the wrong platform. If the project is cross-platform, guard platform-specific commands. + +```xml + + + + + + + + + +``` + +--- + +## AP-21: Property Conditioned on TargetFramework in .props Files + +**Smell**: `` or `` in `Directory.Build.props` or any `.props` file imported before the project body. + +**Why it's bad**: `$(TargetFramework)` is NOT reliably available in `Directory.Build.props` or any `.props` file imported before the project body. It is only set that early for multi-targeting projects, which receive `TargetFramework` as a global property from the outer build. Single-targeting projects (using singular ``) set it in the project body, which is evaluated *after* `.props`. This means property conditions on `$(TargetFramework)` in `.props` files silently fail for single-targeting projects — the condition never matches because the property is empty. This applies to both `` and individual `` elements. + +For a detailed explanation of MSBuild's evaluation and execution phases, see [Build process overview](https://learn.microsoft.com/en-us/visualstudio/msbuild/build-process-overview). + +```xml + + + $(DefineConstants);MY_FEATURE + + + + + $(DefineConstants);MY_FEATURE + + + + + $(DefineConstants);MY_FEATURE + + + + + + $(DefineConstants);MY_FEATURE + +``` + +**⚠️ Item and Target conditions are NOT affected.** This restriction applies ONLY to property conditions (`` and ``). Item conditions (``) and Target conditions in `.props` files are SAFE because items and targets evaluate after all properties (including those set in the project body) have been evaluated. This includes `PackageVersion` items in `Directory.Packages.props`, `PackageReference` items in `Directory.Build.props`, and any other item types. + +**Do NOT flag the following patterns — they are correct:** + +```xml + + + + + + + + + + + + + + + + + +``` + +--- + +## Quick-Reference Checklist + +When reviewing an MSBuild file, scan for these in order: + +| # | Check | Severity | +|---|-------|----------| +| AP-02 | Unquoted conditions | 🔴 Error-prone | +| AP-19 | Side effects in evaluation | 🔴 Dangerous | +| AP-21 | Property conditioned on TargetFramework in .props | 🔴 Silent failure | +| AP-03 | Hardcoded absolute paths | 🔴 Broken on other machines | +| AP-06 | `` with HintPath for NuGet | 🟡 Legacy | +| AP-07 | Missing `PrivateAssets="all"` on tools | 🟡 Leaks to consumers | +| AP-11 | Missing Inputs/Outputs on targets | 🟡 Perf regression | +| AP-13 | Import without Exists guard | 🟡 Fragile | +| AP-05 | Manual file listing in SDK-style | 🔵 Noise | +| AP-04 | Restating SDK defaults | 🔵 Noise | +| AP-08 | Copy-paste across csproj files | 🔵 Maintainability | +| AP-09 | Scattered package versions | 🔵 Version drift | +| AP-01 | `` for built-in tasks | 🔵 Cross-platform | +| AP-14 | Backslashes in cross-platform paths | 🔵 Cross-platform | +| AP-10 | Monolithic targets | 🔵 Maintainability | +| AP-12 | Defaults in .targets instead of .props | 🔵 Ordering issue | +| AP-15 | Unconditional property override | 🔵 Confusing | +| AP-16 | `` for string operations | 🔵 Preference | +| AP-17 | Mixed Include/Update in one ItemGroup | 🔵 Subtle bugs | +| AP-18 | Redundant transitive ProjectReferences | 🔵 Graph noise | +| AP-20 | Platform-specific Exec without guard | 🔵 Cross-platform | diff --git a/.agents/skills/msbuild-antipatterns/references/incremental-build-inputs-outputs.md b/.agents/skills/msbuild-antipatterns/references/incremental-build-inputs-outputs.md new file mode 100644 index 0000000000..7c54447b26 --- /dev/null +++ b/.agents/skills/msbuild-antipatterns/references/incremental-build-inputs-outputs.md @@ -0,0 +1,30 @@ +# Incremental Build: Inputs and Outputs on Custom Targets + +Custom targets **must** specify `Inputs` and `Outputs` attributes so MSBuild can skip them when up-to-date. Without both attributes, the target runs on every build. + +```xml + + + + + + + + + + + + + +``` + +**Key points:** +- **`Inputs`** should include `$(MSBuildProjectFile)` plus any source files that drive generation +- **`Outputs`** should use `$(IntermediateOutputPath)` so generated files go in `obj/` and are managed by MSBuild +- **`FileWrites`** registration ensures `dotnet clean` removes the generated file +- **`Compile` inclusion** adds the generated file to compilation without requiring it at evaluation time + +See the `incremental-build` skill for deep guidance on diagnosing broken incremental builds, FileWrites tracking, and Visual Studio's Fast Up-to-Date Check. diff --git a/.agents/skills/msbuild-antipatterns/references/private-assets.md b/.agents/skills/msbuild-antipatterns/references/private-assets.md new file mode 100644 index 0000000000..e9414eb5cb --- /dev/null +++ b/.agents/skills/msbuild-antipatterns/references/private-assets.md @@ -0,0 +1,22 @@ +# PrivateAssets for Analyzers and Build Tools + +Analyzer and build-tool packages should always use `PrivateAssets="all"` to prevent them from flowing as transitive dependencies to consumers of your library. + +```xml + + + + + + + + + +``` + +**Packages that almost always need `PrivateAssets="all"`:** +- Roslyn analyzers (`*.Analyzers`, `*.CodeFixes`) +- Source generators +- SourceLink packages (`Microsoft.SourceLink.*`) +- Versioning tools (`MinVer`, `Nerdbank.GitVersioning`) +- Build-only tools (`Microsoft.DotNet.ApiCompat`, etc.) diff --git a/.agents/skills/msbuild-modernization/SKILL.md b/.agents/skills/msbuild-modernization/SKILL.md new file mode 100644 index 0000000000..d45b0913dd --- /dev/null +++ b/.agents/skills/msbuild-modernization/SKILL.md @@ -0,0 +1,501 @@ +--- +name: msbuild-modernization +description: "Guide for modernizing and migrating MSBuild project files to SDK-style format. Only activate in MSBuild/.NET build context. USE FOR: converting legacy .csproj/.vbproj with verbose XML to SDK-style, migrating packages.config to PackageReference, removing Properties/AssemblyInfo.cs in favor of auto-generation, eliminating explicit lists via implicit globbing, consolidating shared settings into Directory.Build.props. Indicators of legacy projects: ToolsVersion attribute, , .csproj files > 50 lines for simple projects. DO NOT USE FOR: projects already in SDK-style format, non-.NET build systems (npm, Maven, CMake), .NET Framework projects that cannot move to SDK-style. INVOKES: dotnet try-convert, upgrade-assistant tools." +--- + +# MSBuild Modernization: Legacy to SDK-style Migration + +## Identifying Legacy vs SDK-style Projects + +**Legacy indicators:** + +- `` +- Explicit file lists (`` for every `.cs` file) +- `ToolsVersion` attribute on `` element +- `packages.config` file present +- `Properties\AssemblyInfo.cs` with assembly-level attributes + +**SDK-style indicators:** + +- `` attribute on root element +- Minimal content — a simple project may be 10–15 lines +- No explicit file includes (implicit globbing) +- `` items instead of `packages.config` + +**Quick check:** if a `.csproj` is more than 50 lines for a simple class library or console app, it is likely legacy format. + +```xml + + + + + + Debug + AnyCPU + Library + MyLibrary + MyLibrary + v4.7.2 + 512 + true + + + + +``` + +```xml + + + + net472 + + +``` + +## Migration Checklist: Legacy → SDK-style + +### Step 1: Replace Project Root Element + +**BEFORE:** + +```xml + + + + + + +``` + +**AFTER:** + +```xml + + + +``` + +Remove the XML declaration, `ToolsVersion`, `xmlns`, and both `` lines. The `Sdk` attribute replaces all of them. + +### Step 2: Set TargetFramework + +**BEFORE:** + +```xml + + v4.7.2 + +``` + +**AFTER:** + +```xml + + net472 + +``` + +**TFM mapping table:** + +| Legacy `TargetFrameworkVersion` | SDK-style `TargetFramework` | +|---------------------------------|-----------------------------| +| `v4.6.1` | `net461` | +| `v4.7.2` | `net472` | +| `v4.8` | `net48` | +| (migrating to .NET 6) | `net6.0` | +| (migrating to .NET 8) | `net8.0` | + +### Step 3: Remove Explicit File Includes + +**BEFORE:** + +```xml + + + + + + + + + + + + + + +``` + +**AFTER:** + +Delete all of these `` and `` item groups entirely. SDK-style projects include them automatically via implicit globbing. + +**Exception:** keep explicit entries only for files that need special metadata or reside outside the project directory: + +```xml + + + +``` + +### Step 4: Remove AssemblyInfo.cs + +**BEFORE** (`Properties\AssemblyInfo.cs`): + +```csharp +using System.Reflection; +using System.Runtime.InteropServices; + +[assembly: AssemblyTitle("MyLibrary")] +[assembly: AssemblyDescription("A useful library")] +[assembly: AssemblyCompany("Contoso")] +[assembly: AssemblyProduct("MyLibrary")] +[assembly: AssemblyCopyright("Copyright © Contoso 2024")] +[assembly: ComVisible(false)] +[assembly: Guid("...")] +[assembly: AssemblyVersion("1.2.0.0")] +[assembly: AssemblyFileVersion("1.2.0.0")] +``` + +**AFTER** (in `.csproj`): + +```xml + + MyLibrary + A useful library + Contoso + MyLibrary + Copyright © Contoso 2024 + 1.2.0 + +``` + +Delete `Properties\AssemblyInfo.cs` — the SDK auto-generates assembly attributes from these properties. + +**Alternative:** if you prefer to keep `AssemblyInfo.cs`, disable auto-generation: + +```xml + + false + +``` + +### Step 5: Migrate packages.config → PackageReference + +**BEFORE** (`packages.config`): + +```xml + + + + + + +``` + +**AFTER** (in `.csproj`): + +```xml + + + + + +``` + +Delete `packages.config` after migration. + +**Migration options:** + +- **Visual Studio:** right-click `packages.config` → *Migrate packages.config to PackageReference* +- **CLI:** `dotnet migrate-packages-config` or manual conversion +- **Binding redirects:** SDK-style projects auto-generate binding redirects — remove the `` section from `app.config` if present + +### Step 6: Remove Unnecessary Boilerplate + +Delete all of the following — the SDK provides sensible defaults: + +```xml + + + + + + + Debug + AnyCPU + {...} + Library + Properties + 512 + true + true + + + + + true + full + false + bin\Debug\ + DEBUG;TRACE + prompt + 4 + + + pdbonly + true + bin\Release\ + TRACE + prompt + 4 + + + + + + + + + + + + + + + + + +``` + +**Keep** only properties that differ from SDK defaults (e.g., `Exe`, `` if it differs from the assembly name, custom ``). + +### Step 7: Enable Modern Features + +After migration, consider enabling modern C# features: + +```xml + + net8.0 + enable + enable + latest + +``` + +- `enable` — enables nullable reference type analysis +- `enable` — auto-imports common namespaces (.NET 6+) +- `latest` — uses the latest C# language version (or specify e.g. `12.0`) + +## Complete Before/After Example + +**BEFORE** (legacy — 65 lines): + +```xml + + + + + Debug + AnyCPU + {12345678-1234-1234-1234-123456789ABC} + Library + Properties + MyLibrary + MyLibrary + v4.7.2 + 512 + true + + + true + full + false + bin\Debug\ + DEBUG;TRACE + prompt + 4 + + + pdbonly + true + bin\Release\ + TRACE + prompt + 4 + + + + + + + + + + + + + + + + + + + + +``` + +**AFTER** (SDK-style — 11 lines): + +```xml + + + net472 + + + + + + +``` + +## Common Migration Issues + +**Embedded resources:** files not in a standard location may need explicit includes: + +```xml + + + +``` + +**Content files with CopyToOutputDirectory:** these still need explicit entries: + +```xml + + + + +``` + +**Multi-targeting:** change the element name from singular to plural: + +```xml + +net8.0 + + +net472;net8.0 +``` + +**WPF/WinForms projects:** use the appropriate SDK or properties: + +```xml + + + + + + + true + + true + + +``` + +**Test projects:** use the standard SDK with test framework packages: + +```xml + + + net8.0 + false + + + + + + + +``` + +## Central Package Management Migration + +Centralizes NuGet version management across a multi-project solution. See [https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management](https://learn.microsoft.com/en-us/nuget/consume-packages/central-package-management) for details. + +**Step 1:** Create `Directory.Packages.props` at the repository root with `true` and `` items for all packages. + +**Step 2:** Remove `Version` from each project's `PackageReference`: + +```xml + + + + + +``` + +## Directory.Build Consolidation + +Identify properties repeated across multiple `.csproj` files and move them to shared files. + +**`Directory.Build.props`** (for properties — placed at repo or src root): + +```xml + + + net8.0 + enable + enable + true + Contoso + Copyright © Contoso 2024 + + +``` + +**`Directory.Build.targets`** (for targets/tasks — placed at repo or src root): + +```xml + + + + + +``` + +**Keep in individual `.csproj` files** only what is project-specific: + +```xml + + + Exe + MyApp + + + + + + +``` + +## Tools and Automation + +| Tool | Usage | +|------|-------| +| `dotnet try-convert` | Automated legacy-to-SDK conversion. Install: `dotnet tool install -g try-convert` | +| .NET Upgrade Assistant | Full migration including API changes. Install: `dotnet tool install -g upgrade-assistant` | +| Visual Studio | Right-click `packages.config` → *Migrate packages.config to PackageReference* | +| Manual migration | Often cleanest for simple projects — follow the checklist above | + +**Recommended approach:** + +1. Run `try-convert` for a first pass +2. Review and clean up the output manually +3. Build and fix any issues +4. Enable modern features (nullable, implicit usings) +5. Consolidate shared settings into `Directory.Build.props` diff --git a/.agents/skills/msbuild-server/SKILL.md b/.agents/skills/msbuild-server/SKILL.md new file mode 100644 index 0000000000..b1e8c66dca --- /dev/null +++ b/.agents/skills/msbuild-server/SKILL.md @@ -0,0 +1,68 @@ +--- +name: msbuild-server +description: "Guide for using MSBuild Server to improve CLI build performance. Only activate in MSBuild/.NET build context. Activate when developers report slow incremental builds from the command line, or when CLI builds are noticeably slower than IDE builds. Covers MSBUILDUSESERVER=1 environment variable for persistent server-based caching. Do not activate for IDE-based builds (Visual Studio already uses a long-lived process)." +--- + +# MSBuild Server for CLI Caching + +Use the MSBuild Server to cache evaluation results across CLI builds, matching the performance advantage Visual Studio gets from its long-lived MSBuild process. + +## When to Use + +- Small incremental builds from CLI (`dotnet build`) are slower than expected +- Developers notice that VS builds are faster than CLI builds for the same project +- CI agents run many sequential builds of the same repo + +## When Not to Use + +- IDE-based builds (Visual Studio already uses a long-lived MSBuild process) +- One-off builds where cold-start overhead is acceptable +- Build correctness issues are suspected (disable the server to isolate the problem) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Shell context | No | The shell where the environment variable will be set (bash, PowerShell, or Windows persistent) | + +## Workflow + +### Step 1: Confirm CLI context + +Verify the developer is building from the command line (`dotnet build`), not from Visual Studio or another IDE. The MSBuild Server provides no benefit inside an IDE. + +### Step 2: Set the environment variable + +```bash +# Bash / CI +export MSBUILDUSESERVER=1 + +# PowerShell +$env:MSBUILDUSESERVER = "1" + +# Windows (persistent) +setx MSBUILDUSESERVER 1 +``` + +### Step 3: Validate improvement + +Run two sequential builds of the same project and compare times: + +1. First build (cold): `dotnet build` -- server starts, no cache benefit +2. Second build (warm): `dotnet build` -- should be noticeably faster + +The most noticeable improvement is in repos with many projects or complex `Directory.Build.props` chains. + +## Validation + +- [ ] `MSBUILDUSESERVER=1` is set in the shell +- [ ] Second sequential build is faster than the first +- [ ] `dotnet build-server shutdown` followed by a rebuild confirms the server restarts cleanly + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Expecting improvement in Visual Studio | VS already uses long-lived MSBuild nodes; the server adds no benefit | +| Build correctness issues after enabling | Run `dotnet build-server shutdown` to reset; if issues persist, disable the server | +| Server process using unexpected memory | The server persists in background; shut down with `dotnet build-server shutdown` when idle | diff --git a/.agents/skills/mtp-hot-reload/SKILL.md b/.agents/skills/mtp-hot-reload/SKILL.md new file mode 100644 index 0000000000..29dd22bda3 --- /dev/null +++ b/.agents/skills/mtp-hot-reload/SKILL.md @@ -0,0 +1,145 @@ +--- +name: mtp-hot-reload +description: > + Suggests using Microsoft Testing Platform (MTP) hot reload to iterate fixes + on failing tests without rebuilding. Use when user says "hot reload tests", + "iterate on test fix", "run tests without rebuilding", "speed up test loop", + "fix test faster", or needs to set up MTP hot reload to rapidly iterate on + test failures. Covers setup (NuGet package, environment variable, + launchSettings.json) and the iterative workflow for fixing tests. + DO NOT USE FOR: writing test code, diagnosing test failures, running tests + normally with dotnet test (use run-tests), applying test filters, producing + TRX reports, CI/CD pipeline configuration, or Visual Studio Test Explorer + hot reload (which is a different feature). +--- + +# MTP Hot Reload for Iterative Test Fixing + +Set up and use Microsoft Testing Platform hot reload to rapidly iterate fixes on failing tests without rebuilding between each change. + +## When to Use + +- User has one or more failing tests and wants to iterate fixes quickly +- User wants to avoid rebuild overhead while fixing test code or production code +- User asks about hot reload for tests or speeding up the test-fix loop +- User needs to set up MTP hot reload in their project + +## When Not to Use + +- User needs to write new tests from scratch (use general coding assistance) +- User needs to diagnose why a test is failing (use diagnostic skills) +- User wants Visual Studio Test Explorer hot reload (different feature, built into VS) +- Project uses VSTest -- hot reload requires Microsoft Testing Platform (MTP) +- User needs CI/CD pipeline configuration + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Test project path | No | Path to the test project (.csproj). Defaults to current directory. | +| Failing test name or filter | No | Specific test(s) to iterate on | + +## Workflow + +### Step 1: Verify the project uses Microsoft Testing Platform + +Hot reload requires MTP. It does **not** work with VSTest. + +Follow the detection procedure in the `platform-detection` skill to determine the test platform. + +If the project uses VSTest, inform the user that MTP hot reload is not available and suggest migrating to MTP first (see `migrate-vstest-to-mtp`), or using Visual Studio's built-in Test Explorer hot reload feature instead. + +### Step 2: Add the hot reload NuGet package + +Install the `Microsoft.Testing.Extensions.HotReload` package: + +```shell +dotnet add package Microsoft.Testing.Extensions.HotReload +``` + +> **Note**: When using `Microsoft.Testing.Platform.MSBuild` (included transitively by MSTest, NUnit, and xUnit runners), the extension is auto-registered when you install its NuGet package -- no code changes needed. + +### Step 3: Enable hot reload + +Hot reload is activated by setting the `TESTINGPLATFORM_HOTRELOAD_ENABLED` environment variable to `1`. + +**Option A -- Set it in the shell before running tests:** + +```shell +# PowerShell +$env:TESTINGPLATFORM_HOTRELOAD_ENABLED = "1" + +# bash/zsh +export TESTINGPLATFORM_HOTRELOAD_ENABLED=1 +``` + +**Option B -- Add it to `launchSettings.json` (recommended for repeatable use):** + +Create or update `Properties/launchSettings.json` in the test project: + +```json +{ + "profiles": { + "": { + "commandName": "Project", + "environmentVariables": { + "TESTINGPLATFORM_HOTRELOAD_ENABLED": "1" + } + } + } +} +``` + +### Step 4: Run the tests with hot reload + +Run the test project directly (not through `dotnet test`) to use hot reload in console mode: + +```shell +dotnet run --project +``` + +To filter to specific failing tests, pass the filter after `--`. The syntax depends on the test framework -- see the `filter-syntax` skill for full details. Quick examples: + +| Framework | Filter syntax | +|-----------|--------------| +| MSTest | `dotnet run --project -- --filter "FullyQualifiedName~TestMethodName"` | +| NUnit | `dotnet run --project -- --filter "FullyQualifiedName~TestMethodName"` | +| xUnit v3 | `dotnet run --project -- --filter-method "*TestMethodName"` | +| TUnit | `dotnet run --project -- --treenode-filter "/*/*/ClassName/TestMethodName"` | + +The test host will start, run the tests, and **remain running** waiting for code changes. + +### Step 5: Iterate on the fix + +1. Edit the source code (test code or production code) in your editor +2. The test host detects the changes and re-runs the affected tests automatically +3. Review the updated results in the console +4. Repeat until all targeted tests pass + +> **Important**: Hot reload currently works in **console mode only**. There is no support for hot reload in Test Explorer for Visual Studio or Visual Studio Code. + +### Step 6: Finalize + +Once all tests pass: + +1. Stop the test host (Ctrl+C) +2. Run a full `dotnet test` to confirm all tests pass with a clean build +3. Optionally remove `TESTINGPLATFORM_HOTRELOAD_ENABLED` from the environment or keep `launchSettings.json` for future use + +## Validation + +- [ ] Project uses Microsoft Testing Platform (not VSTest) +- [ ] `Microsoft.Testing.Extensions.HotReload` package is installed +- [ ] `TESTINGPLATFORM_HOTRELOAD_ENABLED` environment variable is set to `1` +- [ ] Tests run and the host remains active waiting for changes +- [ ] Code changes are picked up without manual restart + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Using `dotnet test` instead of `dotnet run` | Hot reload requires `dotnet run --project ` to run the test host directly in console mode | +| Project uses VSTest, not MTP | Hot reload requires MTP. Migrate to MTP first or use VS Test Explorer hot reload | +| Forgetting to set the environment variable | Set `TESTINGPLATFORM_HOTRELOAD_ENABLED=1` before running | +| Expecting Test Explorer integration | Console mode only -- no VS/VS Code Test Explorer support | +| Making unsupported code changes (rude edits) | Some changes (adding new types, changing method signatures) require a restart. Stop and re-run | diff --git a/.agents/skills/platform-detection/SKILL.md b/.agents/skills/platform-detection/SKILL.md new file mode 100644 index 0000000000..4ba6bc0444 --- /dev/null +++ b/.agents/skills/platform-detection/SKILL.md @@ -0,0 +1,58 @@ +--- +name: platform-detection +description: "Reference data for detecting the test platform (VSTest vs Microsoft.Testing.Platform) and test framework (MSTest, xUnit, NUnit, TUnit) from project files. DO NOT USE directly — loaded by run-tests, mtp-hot-reload, and migrate-vstest-to-mtp when they need detection logic." +user-invocable: false +--- + +# Test Platform and Framework Detection + +Determine **which test platform** (VSTest or Microsoft.Testing.Platform) and **which test framework** (MSTest, xUnit, NUnit, TUnit) a project uses. + +**Detection files to always check** (in order): `global.json` → `.csproj` → `Directory.Build.props` → `Directory.Packages.props` + +## Detecting the test framework + +Read the `.csproj` file **and** `Directory.Build.props` / `Directory.Packages.props` (for centrally managed dependencies) and look for: + +| Package or SDK reference | Framework | +|--------------------------|-----------| +| `MSTest` (metapackage, recommended) or `` | MSTest | +| `MSTest.TestFramework` + `MSTest.TestAdapter` | MSTest (also valid for v3/v4) | +| `xunit`, `xunit.v3`, `xunit.v3.mtp-v1`, `xunit.v3.mtp-v2`, `xunit.v3.core.mtp-v1`, `xunit.v3.core.mtp-v2` | xUnit | +| `NUnit` + `NUnit3TestAdapter` | NUnit | +| `TUnit` | TUnit (MTP only) | + +## Detecting the test platform + +The detection logic depends on the .NET SDK version. Run `dotnet --version` to determine it. + +### .NET SDK 10+ + +On .NET 10+, the `global.json` `test.runner` setting is the **authoritative source**: + +- If `global.json` contains `"test": { "runner": "Microsoft.Testing.Platform" }` → **MTP** +- If `global.json` has `"runner": "VSTest"`, or no `test` section exists → **VSTest** + +> **Important**: On .NET 10+, `` alone does **not** switch to MTP. The `global.json` runner setting takes precedence. If the runner is VSTest (or unset), the project uses VSTest regardless of `TestingPlatformDotnetTestSupport`. + +### .NET SDK 8 or 9 + +On older SDKs, check these signals in priority order: + +**1. Check the `` MSBuild property.** Look in the `.csproj`, `Directory.Build.props`, **and** `Directory.Packages.props`. If set to `true` in **any** of these files, the project uses **MTP**. + +> **Critical**: Always read `Directory.Build.props` and `Directory.Packages.props` if they exist. MTP properties are frequently set there instead of in the `.csproj`, so checking only the project file will miss them. + +**2. Check project-level signals:** + +| Signal | Platform | +|--------|----------| +| `` as project SDK | **MTP** by default | +| `true` | **MTP** runner (xUnit) | +| `true` | **MTP** runner (MSTest) | +| `true` | **MTP** runner (NUnit) | +| `Microsoft.Testing.Platform` package referenced directly | **MTP** | +| `TUnit` package referenced | **MTP** (TUnit is MTP-only) | + +> **Note**: The presence of `Microsoft.NET.Test.Sdk` does **not** necessarily mean VSTest. Some frameworks (e.g., MSTest) pull it in transitively for compatibility, even when MTP is enabled. Do not use this package as a signal on its own — always check the MTP signals above first. +> **Key distinction**: VSTest is the classic platform that uses `vstest.console` under the hood. Microsoft.Testing.Platform (MTP) is the newer, faster platform. Both can be invoked via `dotnet test`, but their filter syntax and CLI options differ. diff --git a/.agents/skills/resolve-project-references/SKILL.md b/.agents/skills/resolve-project-references/SKILL.md new file mode 100644 index 0000000000..98b3c288b5 --- /dev/null +++ b/.agents/skills/resolve-project-references/SKILL.md @@ -0,0 +1,58 @@ +--- +name: resolve-project-references +description: "Guide for interpreting ResolveProjectReferences time in MSBuild performance summaries. Only activate in MSBuild/.NET build context. Activate when ResolveProjectReferences appears as the most expensive target and developers are trying to optimize it directly. Explains that the reported time includes wait time for dependent project builds and is misleading. Guides users to focus on task self-time instead. Do not activate for general build performance -- use build-perf-diagnostics instead." +--- + +# Misleading ResolveProjectReferences Time + +Prevent misguided optimization of `ResolveProjectReferences` by explaining that its reported time is wall-clock wait time, not CPU work. + +## When to Use + +- `ResolveProjectReferences` appears as the most expensive target in the Target Performance Summary +- A developer is trying to optimize `ResolveProjectReferences` directly +- Build performance analysis shows a single target consuming 50-80% of total build time + +## When Not to Use + +- General build performance optimization (use `build-perf-diagnostics` instead) +- The bottleneck is clearly a different target (e.g., `Csc`, `ResolveAssemblyReference`) +- The user has not yet captured a binlog or performance summary + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Build log or binlog | Yes | A diagnostic build log or binlog containing the Target Performance Summary | + +## Workflow + +### Step 1: Confirm the misleading symptom + +Verify that `ResolveProjectReferences` appears as the top target in the **Target** Performance Summary. This is the misleading metric. + +### Step 2: Explain why it is misleading + +The reported time includes **waiting for dependent projects to build** while the MSBuild node is yielded (see dotnet/msbuild#3135). During this wait, the node may be doing useful work on other projects. The target itself does very little work. + +### Step 3: Redirect to task self-time + +Guide the user to use the **Task** Performance Summary instead: + +```bash +dotnet msbuild build.binlog -noconlog -fl "-flp:v=diag;logfile=full.log;performancesummary" +grep "Task Performance Summary" -A 50 full.log +``` + +Focus on self-time of actual tasks: + +- **Csc**: see `build-perf-diagnostics` skill (Section 2: Roslyn Analyzers) +- **ResolveAssemblyReference**: see `build-perf-diagnostics` skill (Section 1: RAR) +- **Copy**: see `build-perf-diagnostics` skill (Section 4: File I/O) +- **Serialization bottlenecks**: see `build-parallelism` skill + +## Validation + +- [ ] Task Performance Summary was used instead of Target Performance Summary +- [ ] `ResolveProjectReferences` was not set as the optimization target +- [ ] A concrete task (e.g., `Csc`, `Copy`, `ResolveAssemblyReference`) was identified as the true bottleneck diff --git a/.agents/skills/run-tests/SKILL.md b/.agents/skills/run-tests/SKILL.md new file mode 100644 index 0000000000..3d5fc87d4b --- /dev/null +++ b/.agents/skills/run-tests/SKILL.md @@ -0,0 +1,255 @@ +--- +name: run-tests +description: > + Runs .NET tests with dotnet test. Use when user says "run tests", "run my + tests", "run these tests", "execute tests", "dotnet test", "test filter", + "filter by category", "filter by class", "combine filters", + "run only specific tests", "integration tests", "unit tests", + "tests not running", "hang timeout", "blame-hang", "blame-crash", + "crash dump", "TRX report", "TRX", "test report", "generate TRX", + "TUnit", "treenode-filter", "target framework", "multi-TFM", or needs + to detect the test platform (VSTest or Microsoft.Testing.Platform), + identify the test framework, apply test filters, or troubleshoot test + execution failures. Covers MSTest, xUnit, NUnit, and TUnit across both + VSTest and MTP platforms. Also use for --filter-class, --filter-trait, + --report-trx, --logger trx, --blame-hang-timeout, and other + platform-specific filter and reporting syntax. + DO NOT USE FOR: writing or generating test code, CI/CD pipeline + configuration, or debugging failing test logic. +--- + +# Run .NET Tests + +Detect the test platform and framework, run tests, and apply filters using `dotnet test`. + +## When to Use + +- User wants to run tests in a .NET project +- User needs to run a subset of tests using filters +- User needs help detecting which test platform (VSTest vs MTP) or framework is in use +- User wants to understand the correct filter syntax for their setup + +## When Not to Use + +- User needs to write or generate test code (use `writing-mstest-tests` for MSTest, or general coding assistance for other frameworks) +- User needs to migrate from VSTest to MTP (use `migrate-vstest-to-mtp`) +- User wants to iterate on failing tests without rebuilding (use `mtp-hot-reload`) +- User needs CI/CD pipeline configuration (use CI-specific skills) +- User needs to debug a test (use debugging skills) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Project or solution path | No | Path to the test project (.csproj) or solution (.sln). Defaults to current directory. | +| Filter expression | No | Filter expression to select specific tests | +| Target framework | No | Target framework moniker to run against (e.g., `net8.0`) | + +## Critical Rules — Avoid Cross-Platform Mistakes + +These are the most common agent mistakes. Internalize before proceeding: + +| Rule | Why | +|------|-----| +| **Do NOT use `--logger trx`** for MTP projects | MTP uses `--report-trx` (requires the TrxReport extension package) | +| **Do NOT use `--report-trx`** for VSTest projects | VSTest uses `--logger trx` | +| **Do NOT use `-- --arg`** on .NET SDK 10+ | SDK 10+ passes MTP args directly: `dotnet test --project . --report-trx` | +| **Do NOT omit `--`** on .NET SDK 8/9 with MTP | SDK 8/9 requires the separator: `dotnet test -- --report-trx` | +| **Do NOT use `--filter "ClassName=..."`** with xUnit v3 on MTP | xUnit v3 on MTP uses `--filter-class`, `--filter-method`, `--filter-trait` | +| **Do NOT use bare positional path** on SDK 10+ | Use `--project ` or `--solution ` instead | +| **Do NOT use `--blame`** for MTP projects | MTP uses `--blame-crash` and `--blame-hang-timeout` separately (each requires its extension package) | +| **Do NOT use `--collect "Code Coverage"`** for MTP | MTP uses `--coverage` (requires the CodeCoverage extension package) | + +## Workflow + +### Quick Reference + +| Platform | SDK | Command pattern | +|----------|-----|----------------| +| VSTest | Any | `dotnet test [] [--filter ] [--logger trx]` | +| MTP | 8 or 9 | `dotnet test [] -- ` | +| MTP | 10+ | `dotnet test --project ` | + +**Detection files to always check** (in order): `global.json` -> `.csproj` -> `Directory.Build.props` -> `Directory.Packages.props` + +### Step 1: Detect the test platform and framework + +1. Run `dotnet --version` in the project directory to determine the SDK version. This accounts for `global.json` SDK pinning. +2. Read `global.json` — on .NET SDK 10+, `"test": { "runner": "Microsoft.Testing.Platform" }` is the **authoritative MTP signal**. If present, the project uses MTP and SDK 10+ syntax (no `--` separator). +3. Read `.csproj`, `Directory.Build.props`, **and** `Directory.Packages.props` for framework packages and MTP properties. **Always check all three files** — MTP properties are frequently set in `Directory.Build.props` rather than individual `.csproj` files. +4. For full detection logic (SDK 8/9 signals, framework identification), see the `platform-detection` skill. + +**What to look for in each file:** + +| File | Look for | Indicates | +|------|----------|-----------| +| `global.json` | `"test": { "runner": "Microsoft.Testing.Platform" }` | MTP on SDK 10+ | +| `global.json` | `"sdk": { "version": "..." }` | SDK version (determines `--` separator behavior) | +| `.csproj` | `true` | MTP on SDK 8/9 | +| `.csproj` | `MSTest`, `xunit.v3`, `NUnit`, `TUnit` packages | Framework identity | +| `.csproj` | `Microsoft.NET.Test.Sdk` + test adapter | VSTest (unless overridden by MTP signals above) | +| `.csproj` | `` (plural) | Multi-TFM — may need `--framework` | +| `Directory.Build.props` | `true` | MTP on SDK 8/9 (often set here, not in .csproj) | +| `Directory.Packages.props` | Centrally managed test package versions | Framework identity for CPM repos | + +**Quick detection summary:** + +| Signal | Means | +|--------|-------| +| `global.json` has `"test": { "runner": "Microsoft.Testing.Platform" }` | **MTP on SDK 10+** — pass args directly, no `--` | +| `true` in csproj or Directory.Build.props | **MTP on SDK 8/9** — pass args after `--` | +| Neither signal present | **VSTest** | + +### Step 2: Run tests + +#### VSTest (any .NET SDK version) + +```bash +dotnet test [ | | | | ] +``` + +Common flags: + +| Flag | Description | +|------|-------------| +| `--framework ` | Target a specific framework in multi-TFM projects (e.g., `net8.0`) | +| `--no-build` | Skip build, use previously built output | +| `--filter ` | Run selected tests (see [Step 3](#step-3-run-filtered-tests)) | +| `--logger trx` | Generate TRX results file | +| `--collect "Code Coverage"` | Collect code coverage using Microsoft Code Coverage (built-in, always available) | +| `--blame` | Enable blame mode to detect tests that crash the host | +| `--blame-crash` | Collect a crash dump when the test host crashes | +| `--blame-hang-timeout ` | Abort test if it hangs longer than duration (e.g., `5min`) | +| `-v ` | Verbosity: `quiet`, `minimal`, `normal`, `detailed`, `diagnostic` | + +#### MTP with .NET SDK 8 or 9 + +With `true`, `dotnet test` bridges to MTP but uses VSTest-style argument parsing. MTP-specific arguments must be passed after `--`: + +```bash +dotnet test [ | | | | ] -- +``` + +#### MTP with .NET SDK 10+ + +With the `global.json` runner set to `Microsoft.Testing.Platform`, `dotnet test` natively understands MTP arguments without `--`: + +```bash +dotnet test + [--project ] + [--solution ] + [--test-modules ] + [] +``` + +Examples: + +```bash +# Run all tests in a project +dotnet test --project path/to/MyTests.csproj + +# Run all tests in a directory containing a project +dotnet test --project path/to/ + +# Run all tests in a solution (sln, slnf, slnx) +dotnet test --solution path/to/MySolution.sln + +# Run all tests in a directory containing a solution +dotnet test --solution path/to/ + +# Run with MTP flags +dotnet test --project path/to/MyTests.csproj --report-trx --blame-hang-timeout 5min +``` + +> **Note**: The .NET 10+ `dotnet test` syntax does **not** accept a bare positional argument like the VSTest syntax. Use `--project`, `--solution`, or `--test-modules` to specify the target. + +#### Common MTP flags + +These flags apply to MTP on both SDK versions. On SDK 8/9, pass after `--`; on SDK 10+, pass directly. + +**Built-in flags (always available):** + +| Flag | Description | +|------|-------------| +| `--no-build` | Skip build, use previously built output | +| `--framework ` | Target a specific framework in multi-TFM projects | +| `--results-directory ` | Directory for test result output | +| `--diagnostic` | Enable diagnostic logging for the test platform | +| `--diagnostic-output-directory ` | Directory for diagnostic log output | + +**Extension-dependent flags (require the corresponding extension package to be registered):** + +| Flag | Requires | Description | +|------|----------|-------------| +| `--filter ` | Framework-specific (not all frameworks support this) | Run selected tests (see [Step 3](#step-3-run-filtered-tests)) | +| `--report-trx` | `Microsoft.Testing.Extensions.TrxReport` | Generate TRX results file | +| `--report-trx-filename ` | `Microsoft.Testing.Extensions.TrxReport` | Set TRX output filename | +| `--blame-hang-timeout ` | `Microsoft.Testing.Extensions.HangDump` | Abort test if it hangs longer than duration (e.g., `5min`) | +| `--blame-crash` | `Microsoft.Testing.Extensions.CrashDump` | Collect a crash dump when the test host crashes | +| `--coverage` | `Microsoft.Testing.Extensions.CodeCoverage` | Collect code coverage using Microsoft Code Coverage | + +> Some frameworks (e.g., MSTest) bundle common extensions by default. Others may require explicit package references. If a flag is not recognized, check that the corresponding extension package is referenced in the project. + +#### Alternative MTP invocations + +MTP test projects are standalone executables. Beyond `dotnet test`, they can be run directly: + +```bash +# Build and run +dotnet run --project + +# Run a previously built DLL +dotnet exec + +# Run the executable directly (Windows) + +``` + +These alternative invocations accept MTP command line arguments directly (no `--` separator needed). + +### Step 3: Run filtered tests + +See the `filter-syntax` skill for the complete filter syntax for each platform and framework combination. Key points: + +- **VSTest** (MSTest, xUnit v2, NUnit): `dotnet test --filter ` with `=`, `!=`, `~`, `!~` operators +- **MTP -- MSTest and NUnit**: Same `--filter` syntax as VSTest; pass after `--` on SDK 8/9, directly on SDK 10+ +- **MTP -- xUnit v3**: Uses `--filter-class`, `--filter-method`, `--filter-trait` (not VSTest expression syntax) +- **MTP -- TUnit**: Uses `--treenode-filter` with path-based syntax + +## Validation + +- [ ] Test platform (VSTest or MTP) was correctly identified +- [ ] Test framework (MSTest, xUnit, NUnit, TUnit) was correctly identified +- [ ] Correct `dotnet test` invocation was used for the detected platform and SDK version +- [ ] Filter expressions used the syntax appropriate for the platform and framework +- [ ] Test results were clearly reported to the user + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Missing `Microsoft.NET.Test.Sdk` in a VSTest project | Tests won't be discovered. Add `` | +| Using VSTest `--filter` syntax with xUnit v3 on MTP | xUnit v3 on MTP uses `--filter-class`, `--filter-method`, etc. -- not the VSTest expression syntax | +| Passing MTP args without `--` on .NET SDK 8/9 | Before .NET 10, MTP args must go after `--`: `dotnet test -- --report-trx` | +| Using `-- --arg` separator on .NET SDK 10+ | SDK 10+ passes MTP args directly — do NOT use `--` separator | +| Using `--logger trx` for MTP or `--report-trx` for VSTest | Each platform has its own TRX flag — check the Critical Rules table | +| Only checking `.csproj` for MTP signals | Always check `Directory.Build.props` and `Directory.Packages.props` too — MTP properties are frequently set there | +| Using bare positional path argument on SDK 10+ | SDK 10+ requires named flags: `--project ` or `--solution ` | + +## Troubleshooting + +Common error messages and how to resolve them: + +| Error | Cause | Fix | +|-------|-------|-----| +| `No test is available` or `No test matches the given testcase filter` | Wrong filter syntax for the platform/framework, or tests not discovered | Verify filter syntax matches the platform (see `filter-syntax` skill). For discovery issues, check that the test SDK and adapter packages are installed | +| `The --report-trx option is unrecognized` | MTP extension package not referenced, or using MTP flag on a VSTest project | Add `` for MTP, or use `--logger trx` for VSTest | +| `The --blame-hang-timeout option is unrecognized` | Missing HangDump extension on MTP | Add `` | +| `error NETSDK1045: The current .NET SDK does not support targeting .NET X.0` | SDK version in `global.json` doesn't match the project's target framework | Update `global.json` SDK version or install the required SDK | +| `The test runner process exited with non-zero exit code` | MTP test host crashed or test failure | Run with `--blame-crash` (MTP) or `--blame` (VSTest) to collect a crash dump for diagnosis | +| `No test source files were found` / `No test project found` | `dotnet test` can't find a test project in the given path | Specify the path explicitly: `dotnet test ` (VSTest) or `dotnet test --project ` (SDK 10+) | +| Tests discovered but 0 executed | Filter expression matches no tests | Double-check filter property names and values. Common typo: `TestCategory` (MSTest) vs `Category` (NUnit) vs trait syntax (xUnit) | +| Using `--` for MTP args on .NET SDK 10+ | On .NET 10+, MTP args are passed directly: `dotnet test --project . --blame-hang-timeout 5min` — do NOT use `-- --blame-hang-timeout` | +| Multi-TFM project runs tests for all frameworks | Use `--framework ` to target a specific framework | +| `global.json` runner setting ignored | Requires .NET 10+ SDK. On older SDKs, use `` MSBuild property instead | +| TUnit `--treenode-filter` not recognized | TUnit is MTP-only. On .NET SDK 10+ use `dotnet test`; on older SDKs use `dotnet run` since VSTest-mode `dotnet test` does not support TUnit | diff --git a/.agents/skills/test-anti-patterns/SKILL.md b/.agents/skills/test-anti-patterns/SKILL.md new file mode 100644 index 0000000000..a1a2cf5fe7 --- /dev/null +++ b/.agents/skills/test-anti-patterns/SKILL.md @@ -0,0 +1,140 @@ +--- +name: test-anti-patterns +description: "Quick pragmatic detection-focused review of .NET test code for anti-patterns that undermine reliability and diagnostic value. Use when asked to audit test quality, investigate flaky or coupled tests, find duplication or magic values, or when tests pass but don't actually verify anything. Best for identifying and prioritizing issues in existing tests with severity-ranked findings and targeted remediation guidance. Catches assertion gaps, swallowed exceptions, always-true assertions, flakiness indicators, test coupling, over-mocking, naming issues, magic values, duplicate tests, and structural problems. Do NOT use for direct MSTest API rewrites or implementation-only fixes (for example swapped Assert.AreEqual argument order or converting `DynamicData` from `IEnumerable` to `ValueTuple`) — use writing-mstest-tests instead. For a deep formal audit based on academic test smell taxonomy, use exp-test-smell-detection instead. Works with MSTest, xUnit, NUnit, and TUnit." +--- + +# Test Anti-Pattern Detection + +Quick, pragmatic analysis of .NET test code for anti-patterns and quality issues that undermine test reliability, maintainability, and diagnostic value. + +## When to Use + +- User asks to review test quality or find test smells +- User wants to know why tests are flaky or unreliable +- User asks "are my tests good?" or "what's wrong with my tests?" +- User requests a test audit or test code review +- User wants to improve existing test code + +## When Not to Use + +- User wants to write new tests from scratch (use `writing-mstest-tests`) +- User wants direct implementation fixes in MSTest code rather than a diagnostic review (use `writing-mstest-tests`) +- User asks to fix swapped `Assert.AreEqual` argument order (use `writing-mstest-tests`) +- User asks to convert `DynamicData` from `IEnumerable` to `ValueTuple` (use `writing-mstest-tests`) +- User wants to run or execute tests (use `run-tests`) +- User wants to migrate between test frameworks or versions (use migration skills) +- User wants to measure code coverage (out of scope) +- User wants a deep formal test smell audit with academic taxonomy and extended catalog (use `exp-test-smell-detection`) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Test code | Yes | One or more test files or classes to analyze | +| Production code | No | The code under test, for context on what tests should verify | +| Specific concern | No | A focused area like "flakiness" or "naming" to narrow the review | + +## Workflow + +### Step 1: Gather the test code + +Read the test files the user wants reviewed. If the user points to a directory or project, scan for all test files using the framework-specific markers in the `dotnet-test-frameworks` skill (e.g., `[TestClass]`, `[Fact]`, `[Test]`). + +If production code is available, read it too -- this is critical for detecting tests that are coupled to implementation details rather than behavior. + +### Step 2: Scan for anti-patterns + +Check each test file against the anti-pattern catalog below. Report findings grouped by severity. + +#### Critical -- Tests that give false confidence + +| Anti-Pattern | What to Look For | +|---|---| +| **No assertions** | Test methods that execute code but never assert anything. A passing test without assertions proves nothing. | +| **Swallowed exceptions** | `try { ... } catch { }` or `catch (Exception)` without rethrowing or asserting. Failures are silently hidden. | +| **Assert in catch block only** | `try { Act(); } catch (Exception ex) { Assert.Fail(ex.Message); }` -- use `Assert.ThrowsException` or equivalent instead. The test passes when no exception is thrown even if the result is wrong. | +| **Always-true assertions** | `Assert.IsTrue(true)`, `Assert.AreEqual(x, x)`, or conditions that can never fail. | +| **Commented-out assertions** | Assertions that were disabled but the test still runs, giving the illusion of coverage. | + +#### High -- Tests likely to cause pain + +| Anti-Pattern | What to Look For | +|---|---| +| **Flakiness indicators** | `Thread.Sleep(...)`, `Task.Delay(...)` for synchronization, `DateTime.Now`/`DateTime.UtcNow` without abstraction, `Random` without a seed, environment-dependent paths. | +| **Test ordering dependency** | Static mutable fields modified across tests, `[TestInitialize]` that doesn't fully reset state, tests that fail when run individually but pass in suite (or vice versa). | +| **Over-mocking** | More mock setup lines than actual test logic. Verifying exact call sequences on mocks rather than outcomes. Mocking types the test owns. For a deep mock audit, use `exp-mock-usage-analysis`. | +| **Implementation coupling** | Testing private methods via reflection, asserting on internal state, verifying exact method call counts on collaborators instead of observable behavior. | +| **Broad exception assertions** | `Assert.ThrowsException(...)` instead of the specific exception type. Also: `[ExpectedException(typeof(Exception))]`. | + +#### Medium -- Maintainability and clarity issues + +| Anti-Pattern | What to Look For | +|---|---| +| **Poor naming** | Test names like `Test1`, `TestMethod`, names that don't describe the scenario or expected outcome. Good: `Add_NegativeNumber_ThrowsArgumentException`. | +| **Magic values** | Unexplained numbers or strings in arrange/assert: `Assert.AreEqual(42, result)` -- what does 42 mean? | +| **Duplicate tests** | Three or more test methods with near-identical bodies that differ only in a single input value. Should be data-driven (`[DataRow]`, `[Theory]`, `[TestCase]`). For a detailed duplication analysis, use `exp-test-maintainability`. Note: Two tests covering distinct boundary conditions (e.g., zero vs. negative) are NOT duplicates -- separate tests for different edge cases provide clearer failure diagnostics and are a valid practice. | +| **Giant tests** | Test methods exceeding ~30 lines or testing multiple behaviors at once. Hard to diagnose when they fail. | +| **Assertion messages that repeat the assertion** | `Assert.AreEqual(expected, actual, "Expected and actual are not equal")` adds no information. Messages should describe the business meaning. | +| **Missing AAA separation** | Arrange, Act, Assert phases are interleaved or indistinguishable. | + +#### Low -- Style and hygiene + +| Anti-Pattern | What to Look For | +|---|---| +| **Unused test infrastructure** | `[TestInitialize]`/`[SetUp]` that does nothing, test helper methods that are never called. | +| **IDisposable not disposed** | Test creates `HttpClient`, `Stream`, or other disposable objects without `using` or cleanup. | +| **Console.WriteLine debugging** | Leftover `Console.WriteLine` or `Debug.WriteLine` statements used during test development. | +| **Inconsistent naming convention** | Mix of naming styles in the same test class (e.g., some use `Method_Scenario_Expected`, others use `ShouldDoSomething`). | + +### Step 3: Calibrate severity honestly + +Before reporting, re-check each finding against these severity rules: + +- **Critical/High**: Only for issues that cause tests to give false confidence or be unreliable. A test that always passes regardless of correctness is Critical. Flaky shared state is High. +- **Medium**: Only for issues that actively harm maintainability -- 5+ nearly-identical tests, truly meaningless names like `Test1`. +- **Low**: Cosmetic naming mismatches, minor style preferences, assertion messages that could be better. When in doubt, rate Low. +- **Not an issue**: Separate tests for distinct boundary conditions (zero vs. negative vs. null). Explicit per-test setup instead of `[TestInitialize]` (this *improves* isolation). Tests that are short and clear but could theoretically be consolidated. + +IMPORTANT: If the tests are well-written, say so clearly up front. Do not inflate severity to justify the review. A review that finds zero Critical/High issues and only minor Low suggestions is a valid and valuable outcome. Lead with what the tests do well. + +### Step 4: Report findings + +Present findings in this structure: + +1. **Summary** -- Total issues found, broken down by severity (Critical / High / Medium / Low). If tests are well-written, lead with that assessment. +2. **Critical and High findings** -- List each with: + - The anti-pattern name + - The specific location (file, method name, line) + - A brief explanation of why it's a problem + - A concrete fix (show before/after code when helpful) +3. **Medium and Low findings** -- Summarize in a table unless the user wants full detail +4. **Positive observations** -- Call out things the tests do well (sealed class, specific exception types, data-driven tests, clear AAA structure, proper use of fakes, good naming). Don't only report negatives. + +### Step 5: Prioritize recommendations + +If there are many findings, recommend which to fix first: + +1. **Critical** -- Fix immediately, these tests may be giving false confidence +2. **High** -- Fix soon, these cause flakiness or maintenance burden +3. **Medium/Low** -- Fix opportunistically during related edits + +## Validation + +- [ ] Every finding includes a specific location (not just a general warning) +- [ ] Every Critical/High finding includes a concrete fix +- [ ] Report covers all categories (assertions, isolation, naming, structure) +- [ ] Positive observations are included alongside problems +- [ ] Recommendations are prioritized by severity + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| Reporting style issues as critical | Naming and formatting are Medium/Low, never Critical | +| Suggesting rewrites instead of targeted fixes | Show minimal diffs -- change the assertion, not the whole test | +| Flagging intentional design choices | If `Thread.Sleep` is in an integration test testing actual timing, that's not an anti-pattern. Consider context. | +| Inventing false positives on clean code | If tests follow best practices, say so. A review finding "0 Critical, 0 High, 1 Low" is perfectly valid. Don't inflate findings to justify the review. | +| Flagging separate boundary tests as duplicates | Two tests for zero and negative inputs test different edge cases. Only flag as duplicates when 3+ tests have truly identical bodies differing by a single value. | +| Rating cosmetic issues as Medium | Naming mismatches (e.g., method name says `ArgumentException` but asserts `ArgumentOutOfRangeException`) are Low, not Medium -- the test still works correctly. | +| Ignoring the test framework | xUnit uses `[Fact]`/`[Theory]`, NUnit uses `[Test]`/`[TestCase]`, MSTest uses `[TestMethod]`/`[DataRow]` -- use correct terminology | +| Missing the forest for the trees | If 80% of tests have no assertions, lead with that systemic issue rather than listing every instance | diff --git a/.agents/skills/writing-mstest-tests/SKILL.md b/.agents/skills/writing-mstest-tests/SKILL.md new file mode 100644 index 0000000000..432b075153 --- /dev/null +++ b/.agents/skills/writing-mstest-tests/SKILL.md @@ -0,0 +1,350 @@ +--- +name: writing-mstest-tests +description: "Best practices for writing new MSTest 3.x/4.x unit tests and implementing concrete fixes in existing MSTest code. Use when the user asks to write, create, implement, repair, or modernize tests (including fix-it prompts such as 'something seems off, fix issues'). Primary fit for direct code changes like correcting swapped Assert.AreEqual argument order, replacing outdated assertion patterns, and converting DynamicData from IEnumerable to ValueTuple-based data sets. Covers modern assertions, data-driven tests, test lifecycle, MSTest.Sdk, sealed classes, Assert.Throws, DynamicData with ValueTuples, TestContext, and conditional execution. Do NOT use for broad test quality audits, flaky-test investigations, or test smell detection reports — use test-anti-patterns instead." +--- + +# Writing MSTest Tests + +Help users write effective, modern unit tests with MSTest 3.x/4.x using current APIs and best practices. + +## When to Use + +- User wants to write new MSTest unit tests +- User wants to improve or modernize existing MSTest tests by implementing concrete fixes +- User asks about MSTest assertion APIs, data-driven patterns, or test lifecycle +- User needs help fixing a specific MSTest test bug or failing assertion +- User asks to fix swapped `Assert.AreEqual` argument order (expected first, actual second) +- User asks to convert `DynamicData` from `IEnumerable` to ValueTuple-based data + +## When Not to Use + +- User needs a test quality audit, anti-pattern detection, or flaky-test investigation (use `test-anti-patterns`) +- User needs to run or execute tests (use the `run-tests` skill) +- User needs to upgrade from MSTest v1/v2 to v3 (use `migrate-mstest-v1v2-to-v3`) +- User needs to upgrade from MSTest v3 to v4 (use `migrate-mstest-v3-to-v4`) +- User needs CI/CD pipeline configuration +- User is using xUnit, NUnit, or TUnit (not MSTest) + +## Inputs + +| Input | Required | Description | +|-------|----------|-------------| +| Code under test | No | The production code to be tested | +| Existing test code | No | Current tests to fix, update, or modernize | +| Test scenario description | No | What behavior the user wants to test | + +## Workflow + +### Step 1: Determine project setup + +Check the test project for MSTest version and configuration: + +- If using `MSTest.Sdk` (``): modern setup, all features available +- If using `MSTest` metapackage: modern setup (MSTest 3.x+) +- If using `MSTest.TestFramework` + `MSTest.TestAdapter`: check version for feature availability + +Recommend MSTest.Sdk or the MSTest metapackage for new projects: + +```xml + + + + net9.0 + + +``` + +When using `MSTest.Sdk`, put the version in `global.json` instead of the project file so all test projects get bumped together: + +```json +{ + "msbuild-sdks": { + "MSTest.Sdk": "3.8.2" + } +} +``` + +```xml + + + + net9.0 + + + + + +``` + +### Step 2: Write test classes following conventions + +Apply these structural conventions: + +- **Seal test classes** with `sealed` for performance and design clarity +- Use `[TestClass]` on the class and `[TestMethod]` on test methods +- Follow the **Arrange-Act-Assert** (AAA) pattern +- Name tests using `MethodName_Scenario_ExpectedBehavior` +- Use separate test projects with naming convention `[ProjectName].Tests` + +```csharp +[TestClass] +public sealed class OrderServiceTests +{ + [TestMethod] + public void CalculateTotal_WithDiscount_ReturnsReducedPrice() + { + // Arrange + var service = new OrderService(); + var order = new Order { Price = 100m, DiscountPercent = 10 }; + + // Act + var total = service.CalculateTotal(order); + + // Assert + Assert.AreEqual(90m, total); + } +} +``` + +### Step 3: Use modern assertion APIs + +Use the correct assertion for each scenario. Prefer `Assert` class methods over `StringAssert` or `CollectionAssert` where both exist. + +#### Equality and null checks + +```csharp +Assert.AreEqual(expected, actual); // Value equality +Assert.AreSame(expected, actual); // Reference equality +Assert.IsNull(value); +Assert.IsNotNull(value); +``` + +#### Exception testing -- use `Assert.Throws` instead of `[ExpectedException]` + +```csharp +// Synchronous +var ex = Assert.ThrowsExactly(() => service.Process(null)); +Assert.AreEqual("input", ex.ParamName); + +// Async +var ex = await Assert.ThrowsExactlyAsync( + async () => await service.ProcessAsync(null)); +``` + +- `Assert.Throws` matches `T` or any derived type +- `Assert.ThrowsExactly` matches only the exact type `T` + +#### Collection assertions + +```csharp +Assert.Contains(expectedItem, collection); +Assert.DoesNotContain(unexpectedItem, collection); +var single = Assert.ContainsSingle(collection); // Returns the single element +Assert.HasCount(3, collection); +Assert.IsEmpty(collection); +Assert.IsNotEmpty(collection); +``` + +Replace generic `Assert.IsTrue` with specialized assertions -- they give better failure messages: + +| Instead of | Use | +|---|---| +| `Assert.IsTrue(list.Count > 0)` | `Assert.IsNotEmpty(list)` | +| `Assert.IsTrue(list.Count() == 3)` | `Assert.HasCount(3, list)` | +| `Assert.IsTrue(x != null)` | `Assert.IsNotNull(x)` | +| `list.Single(predicate)` + `Assert.IsNotNull` | `Assert.ContainsSingle(list)` | +| `Assert.IsTrue(list.Contains(item))` | `Assert.Contains(item, list)` | + +#### String assertions + +```csharp +Assert.Contains("expected", actualString); +Assert.StartsWith("prefix", actualString); +Assert.EndsWith("suffix", actualString); +Assert.MatchesRegex(@"\d{3}-\d{4}", phoneNumber); +``` + +#### Type assertions + +```csharp +// MSTest 3.x -- out parameter +Assert.IsInstanceOfType(result, out var typed); +typed.Handle(); + +// MSTest 4.x -- returns directly +var typed = Assert.IsInstanceOfType(result); +``` + +#### Comparison assertions + +```csharp +Assert.IsGreaterThan(lowerBound, actual); +Assert.IsLessThan(upperBound, actual); +Assert.IsInRange(actual, low, high); +``` + +### Step 4: Use data-driven tests for multiple inputs + +#### DataRow for inline values + +```csharp +[TestMethod] +[DataRow(1, 2, 3)] +[DataRow(0, 0, 0, DisplayName = "Zeros")] +[DataRow(-1, 1, 0)] +public void Add_ReturnsExpectedSum(int a, int b, int expected) +{ + Assert.AreEqual(expected, Calculator.Add(a, b)); +} +``` + +#### DynamicData with ValueTuples (preferred for complex data) + +Prefer `ValueTuple` return types over `IEnumerable` for type safety: + +```csharp +[TestMethod] +[DynamicData(nameof(DiscountTestData))] +public void ApplyDiscount_ReturnsExpectedPrice(decimal price, int percent, decimal expected) +{ + var result = PriceCalculator.ApplyDiscount(price, percent); + Assert.AreEqual(expected, result); +} + +// ValueTuple -- preferred (MSTest 3.7+) +public static IEnumerable<(decimal price, int percent, decimal expected)> DiscountTestData => +[ + (100m, 10, 90m), + (200m, 25, 150m), + (50m, 0, 50m), +]; +``` + +When you need metadata per test case, use `TestDataRow`: + +```csharp +public static IEnumerable> DiscountTestDataWithMetadata => +[ + new((100m, 10, 90m)) { DisplayName = "10% discount" }, + new((200m, 25, 150m)) { DisplayName = "25% discount" }, + new((50m, 0, 50m)) { DisplayName = "No discount" }, +]; +``` + +### Step 5: Handle test lifecycle correctly + +- **Always initialize in the constructor** -- this enables `readonly` fields and works correctly with nullability analyzers (fields are guaranteed non-null after construction) +- Use `[TestInitialize]` **only** for async initialization, combined with the constructor for sync parts +- Use `[TestCleanup]` for cleanup that must run even on failure +- Inject `TestContext` via constructor (MSTest 3.6+) + +```csharp +[TestClass] +public sealed class RepositoryTests +{ + private readonly TestContext _testContext; + private readonly FakeDatabase _db; // readonly -- guaranteed by constructor + + public RepositoryTests(TestContext testContext) + { + _testContext = testContext; + _db = new FakeDatabase(); // sync init in ctor + } + + [TestInitialize] + public async Task InitAsync() + { + // Use TestInitialize ONLY for async setup + await _db.SeedAsync(); + } + + [TestCleanup] + public void Cleanup() => _db.Reset(); +} +``` + +#### Execution order + +1. `[AssemblyInitialize]` -- once per assembly +2. `[ClassInitialize]` -- once per class +3. Per test: + - With `TestContext` property injection: Constructor -> set `TestContext` property -> `[TestInitialize]` + - With constructor injection of `TestContext`: Constructor (receives `TestContext`) -> `[TestInitialize]` +4. Test method +5. `[TestCleanup]` -> `DisposeAsync` -> `Dispose` -- per test +6. `[ClassCleanup]` -- once per class +7. `[AssemblyCleanup]` -- once per assembly + +### Step 6: Apply cancellation and timeout patterns + +Always use `TestContext.CancellationToken` with `[Timeout]`: + +```csharp +[TestMethod] +[Timeout(5000)] +public async Task FetchData_ReturnsWithinTimeout() +{ + var result = await _client.GetDataAsync(_testContext.CancellationToken); + Assert.IsNotNull(result); +} +``` + +### Step 7: Use advanced features where appropriate + +#### Retry flaky tests (MSTest 3.9+) + +Use only for genuinely flaky external dependencies (network, file system), not to paper over race conditions or shared state issues. + +```csharp +[TestMethod] +[Retry(3)] +public void ExternalService_EventuallyResponds() { } +``` + +#### Conditional execution (MSTest 3.10+) + +```csharp +[TestMethod] +[OSCondition(OperatingSystems.Windows)] +public void WindowsRegistry_ReadsValue() { } + +[TestMethod] +[CICondition(ConditionMode.Exclude)] +public void LocalOnly_InteractiveTest() { } +``` + +#### Parallelization + +```csharp +[assembly: Parallelize(Workers = 4, Scope = ExecutionScope.MethodLevel)] + +[TestClass] +[DoNotParallelize] // Opt out specific classes +public sealed class DatabaseIntegrationTests { } +``` + +## Validation + +- [ ] Test classes are `sealed` +- [ ] Test methods follow `MethodName_Scenario_ExpectedBehavior` naming +- [ ] `Assert.ThrowsExactly` used instead of `[ExpectedException]` +- [ ] Specialized assertions used instead of `Assert.IsTrue` (e.g., `Assert.IsNotNull`, `Assert.AreEqual`) +- [ ] DynamicData uses ValueTuple return types instead of `IEnumerable` +- [ ] Sync initialization done in the constructor, not `[TestInitialize]` +- [ ] `TestContext.CancellationToken` passed to async calls in tests with `[Timeout]` +- [ ] Project builds with zero errors and all tests pass + +## Common Pitfalls + +| Pitfall | Solution | +|---------|----------| +| `Assert.AreEqual(actual, expected)` -- swapped arguments | Always put expected first: `Assert.AreEqual(expected, actual)`. Failure messages show "Expected: X, Actual: Y" so wrong order makes messages confusing | +| `[ExpectedException]` -- obsolete, cannot assert message | Use `Assert.Throws` or `Assert.ThrowsExactly` | +| `items.Single()` -- unclear exception on failure | Use `Assert.ContainsSingle(items)` for better failure messages | +| Hard cast `(MyType)result` -- unclear exception | Use `Assert.IsInstanceOfType(result)` | +| `IEnumerable` for DynamicData | Use `IEnumerable<(T1, T2, ...)>` ValueTuples for type safety | +| Sync setup in `[TestInitialize]` | Initialize in the constructor instead -- enables `readonly` fields and satisfies nullability analyzers | +| `CancellationToken.None` in async tests | Use `TestContext.CancellationToken` for cooperative timeout | +| `public TestContext? TestContext { get; set; }` | Drop the `?` -- MSTest suppresses CS8618 for this property | +| `TestContext TestContext { get; set; } = null!` | Remove `= null!` -- unnecessary, MSTest handles assignment | +| Non-sealed test classes | Seal test classes by default for performance | diff --git a/.copilot/.gitattributes b/.copilot/.gitattributes new file mode 100644 index 0000000000..90e066412e --- /dev/null +++ b/.copilot/.gitattributes @@ -0,0 +1,2 @@ +# managed by gh-copilot-curate: keep stable byte content across CRLF/LF checkouts +* text eol=lf diff --git a/.copilot/curate/manifest.lock.yml b/.copilot/curate/manifest.lock.yml new file mode 100644 index 0000000000..76c1273d18 --- /dev/null +++ b/.copilot/curate/manifest.lock.yml @@ -0,0 +1,317 @@ +# .copilot/curate/manifest.lock.yml — generated by gh-copilot-curate. +# Do not edit by hand: re-run "gh copilot-curate" commands to regenerate. +version: 1 +managedBy: gh-copilot-curate +toolVersion: 0.6.0 (commit 87f35bd, built 2026-06-04T11:24:56Z) +generatedAt: 2026-06-04T11:28:05.4344191Z +manifestHash: sha256:18fdca9646cd0dad5e68e46c272054a10bebc02fe77975919252362e053c18dd +plugins: + - 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id: dotnet-test + source: dotnet/skills + ref: v1.0.0 + install: + mode: summary + - id: dotnet-msbuild + source: dotnet/skills + ref: v1.0.0 + install: + mode: summary diff --git a/.gitattributes b/.gitattributes index ed9894af6a..417259938d 100644 --- a/.gitattributes +++ b/.gitattributes @@ -90,4 +90,11 @@ # running that target. ############################################################################### *.resx merge=union -*.xlf merge=union \ No newline at end of file +*.xlf merge=union + +# BEGIN gh-copilot-curate managed +# Keep installed skills and agents at stable bytes across CRLF/LF checkouts +# so gh copilot-curate verify does not report spurious drift. +.agents/skills/** text eol=lf +.github/agents/** text eol=lf +# END gh-copilot-curate managed diff --git a/.github/agents/build-perf.agent.md b/.github/agents/build-perf.agent.md new file mode 100644 index 0000000000..73a7e4c379 --- /dev/null +++ b/.github/agents/build-perf.agent.md @@ -0,0 +1,68 @@ +--- +name: build-perf +description: "Agent for diagnosing and optimizing MSBuild build performance. Runs multi-step analysis: generates binlogs, analyzes timeline and bottlenecks, identifies expensive targets/tasks/analyzers, and suggests concrete optimizations. Invoke when builds are slow or when asked to optimize build times." +user-invokable: true +disable-model-invocation: false +--- + +# Build Performance Agent + +You are a specialized agent for diagnosing and optimizing MSBuild build performance. You actively run builds, analyze binlogs, and provide data-driven optimization recommendations. + +## Domain Relevance Check + +Before starting any analysis, verify the context is MSBuild-related. If the workspace has no `.csproj`, `.sln`, `.props`, or `.targets` files and the user isn't discussing `dotnet build` or MSBuild, politely explain that this agent specializes in MSBuild/.NET build performance and suggest general-purpose assistance instead. + +## Analysis Workflow + +### Step 1: Establish Baseline +- Run the build with binlog: `dotnet build /bl:perf-baseline.binlog -m` +- Replay to diagnostic log: `dotnet msbuild perf-baseline.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary` +- Record total build duration (from build output) and node count + +### Step 2: Top-down Analysis +Analyze the replayed diagnostic log: +1. `grep 'Target Performance Summary' -A 50 full.log` → find dominant targets and their cumulative time +2. `grep 'Task Performance Summary' -A 50 full.log` → find dominant tasks +3. `grep 'Project Performance Summary' -A 50 full.log` → find time-heavy projects +4. `grep -i 'Total analyzer execution time\|analyzer.*elapsed' full.log` → check analyzer overhead +5. `grep -i 'node.*assigned\|Building with' full.log | head -30` → assess parallelism + +### Step 3: Bottleneck Classification +Classify findings into categories: +- **Serialization**: nodes idle, one project blocking others → project graph issue +- **Compilation**: Csc task dominant → too much code in one project, or expensive analyzers +- **Resolution**: RAR dominant → too many references, slow assembly resolution +- **I/O**: Copy/Move tasks dominant → excessive file copying +- **Evaluation**: slow startup → import chain or glob issues +- **Analyzers**: disproportionate analyzer time → specific analyzer is expensive + +### Step 4: Deep Dive +For each identified bottleneck: +- `grep 'Target "TargetName"' full.log` → find specific target execution across projects +- `grep -i 'Csc.*elapsed\|Csc.*duration' full.log` → check compilation times +- `grep 'specific pattern' full.log` → search for specific issues +- Read project files directly to understand build configuration + +### Step 5: Recommendations +Produce prioritized recommendations: +- **Quick wins**: changes that can be made immediately (flags, config) +- **Medium effort**: refactoring project files or structure +- **Large effort**: architectural changes (project splitting, etc.) + +### Step 6: Verify (Optional) +If asked, apply fixes and re-run the build to measure improvement. + +## Specialized Skills Reference +Load these skills for detailed guidance on specific optimization areas: +- `build-perf-diagnostics` — Performance metrics and common bottlenecks +- `incremental-build` — Incremental build optimization +- `build-parallelism` — Parallelism and graph build +- `eval-performance` — Evaluation performance +- `check-bin-obj-clash` — Output path conflicts + +## Important Notes +- Always use `/bl` to generate binlogs for data-driven analysis +- Use the `binlog-generation` skill naming convention (`/bl:N.binlog` with incrementing N) +- Compare before/after binlogs to measure improvement +- Report findings with concrete numbers (durations, percentages) diff --git a/.github/agents/code-testing-builder.agent.md b/.github/agents/code-testing-builder.agent.md new file mode 100644 index 0000000000..f41218eb02 --- /dev/null +++ b/.github/agents/code-testing-builder.agent.md @@ -0,0 +1,77 @@ +--- +description: >- + Runs build/compile commands for any language and reports results. + + Use when: compiling code, running dotnet build, checking for compilation + errors, verifying project builds successfully. +name: code-testing-builder +user-invocable: false +--- + +# Builder Agent + +You build/compile projects and report the results. You are polyglot — you work with any programming language. + +> **Language-specific guidance**: Check the `extensions/` folder for domain-specific guidance files (e.g., `extensions/dotnet.md` for .NET). Users can add their own extensions for other languages or domains. + +## Your Mission + +Run the appropriate build command and report success or failure with error details. + +## Process + +### 1. Discover Build Command + +If not provided, check in order: + +1. `.testagent/research.md` or `.testagent/plan.md` for Commands section +2. Project files: + - `*.csproj` / `*.sln` → `dotnet build` + - `package.json` → `npm run build` or `npm run compile` + - `pyproject.toml` / `setup.py` → `python -m py_compile` or skip + - `go.mod` → `go build ./...` + - `Cargo.toml` → `cargo build` + - `Makefile` → `make` or `make build` + +### 2. Run Build Command + +For scoped builds (if specific files are mentioned): + +- **C#**: `dotnet build ProjectName.csproj` +- **TypeScript**: `npx tsc --noEmit` +- **Go**: `go build ./...` +- **Rust**: `cargo build` + +### 3. Parse Output + +Look for error messages (CS\d+, TS\d+, E\d+, etc.), warning messages, and success indicators. + +### 4. Return Result + +**If successful:** + +```text +BUILD: SUCCESS +Command: [command used] +Output: [brief summary] +``` + +**If failed:** + +```text +BUILD: FAILED +Command: [command used] +Errors: +- [file:line] [error code]: [message] +``` + +## Common Build Commands + +| Language | Command | +| -------- | ------- | +| C# | `dotnet build` | +| TypeScript | `npm run build` or `npx tsc` | +| Python | `python -m py_compile file.py` | +| Go | `go build ./...` | +| Rust | `cargo build` | +| Java | `mvn compile` or `gradle build` | diff --git a/.github/agents/code-testing-fixer.agent.md b/.github/agents/code-testing-fixer.agent.md new file mode 100644 index 0000000000..b2d5e3761f --- /dev/null +++ b/.github/agents/code-testing-fixer.agent.md @@ -0,0 +1,83 @@ +--- +description: >- + Fixes compilation errors in source or test files. + + Use when: resolving build errors, fixing CS/TS error codes, adding missing + imports, correcting type mismatches, fixing compilation failures. +name: code-testing-fixer +user-invocable: false +--- + +# Fixer Agent + +You fix compilation errors in code files. You are polyglot — you work with any programming language. + +> **Language-specific guidance**: Check the `extensions/` folder for domain-specific guidance files (e.g., `extensions/dotnet.md` for .NET). Users can add their own extensions for other languages or domains. + +## Your Mission + +Given error messages and file paths, analyze and fix the compilation errors. + +## Process + +### 1. Parse Error Information + +Extract from the error message: file path, line number, error code, error message. + +### 2. Read the File + +Read the file content around the error location. + +### 3. Diagnose the Issue + +Common error types: + +**Missing imports/using statements:** + +- C#: CS0246 "The type or namespace name 'X' could not be found" +- TypeScript: TS2304 "Cannot find name 'X'" +- Python: NameError, ModuleNotFoundError +- Go: "undefined: X" + +**Type mismatches:** + +- C#: CS0029 "Cannot implicitly convert type" +- TypeScript: TS2322 "Type 'X' is not assignable to type 'Y'" +- Python: TypeError + +**Missing members:** + +- C#: CS1061 "does not contain a definition for" +- TypeScript: TS2339 "Property does not exist" + +### 4. Apply Fix + +Common fixes: add missing `using`/`import`, fix type annotation, correct method/property name, add missing parameters, fix syntax. + +### 5. Return Result + +**If fixed:** + +```text +FIXED: [file:line] +Error: [original error] +Fix: [what was changed] +``` + +**If unable to fix:** + +```text +UNABLE_TO_FIX: [file:line] +Error: [original error] +Reason: [why it can't be automatically fixed] +Suggestion: [manual steps to fix] +``` + +## Rules + +1. **One fix at a time** — fix one error, then let builder retry +2. **Be conservative** — only change what's necessary +3. **Preserve style** — match existing code formatting +4. **Report clearly** — state what was changed +5. **Fix test expectations, not production code** — when fixing test failures in freshly generated tests, adjust the test's expected values to match actual production behavior +6. **CS7036 / missing parameter** — read the constructor or method signature to find all required parameters and add them diff --git a/.github/agents/code-testing-generator.agent.md b/.github/agents/code-testing-generator.agent.md new file mode 100644 index 0000000000..24a45f1aa0 --- /dev/null +++ b/.github/agents/code-testing-generator.agent.md @@ -0,0 +1,126 @@ +--- +description: >- + Orchestrates comprehensive test generation using + Research-Plan-Implement pipeline. Use when asked to generate tests, write unit + tests, improve test coverage, or add tests. +name: code-testing-generator +tools: ['read', 'search', 'edit', 'task', 'skill', 'terminal'] +--- + +# Test Generator Agent + +You coordinate test generation using the Research-Plan-Implement (RPI) pipeline. You are polyglot — you work with any programming language. + +> **Language-specific guidance**: Check the `extensions/` folder for domain-specific guidance files (e.g., `extensions/dotnet.md` for .NET). Users can add their own extensions for other languages or domains. + +## Pipeline Overview + +1. **Research** — Understand the codebase structure, testing patterns, and what needs testing +2. **Plan** — Create a phased test implementation plan +3. **Implement** — Execute the plan phase by phase, with verification + +## Workflow + +### Step 1: Clarify the Request + +Understand what the user wants: scope (project, files, classes), priority areas, framework preferences. If clear, proceed directly. If the user provides no details or a very basic prompt (e.g., "generate tests"), use [unit-test-generation.prompt.md](../skills/code-testing-agent/unit-test-generation.prompt.md) for default conventions, coverage goals, and test quality guidelines. + +### Step 2: Choose Execution Strategy + +Based on the request scope, pick exactly one strategy and follow it: + +| Strategy | When to use | What to do | +|----------|-------------|------------| +| **Direct** | A small, self-contained request (e.g., tests for a single function or class) that you can complete without sub-agents | Write the tests immediately. Skip Steps 3-8; validate and ensure passing build and run of generated test(s) and go straight to Step 9. | +| **Single pass** | A moderate scope (couple projects or modules) that a single Research → Plan → Implement cycle can cover | Execute Steps 3-8 once, then proceed to Step 9. | +| **Iterative** | A large scope or ambitious coverage target that one pass cannot satisfy | Execute Steps 3-8, then re-evaluate coverage. If the target is not met, repeat Steps 3-8 with a narrowed focus on remaining gaps. Use unique names for each iteration's `.testagent/` documents (e.g., `research-2.md`, `plan-2.md`) so earlier results are not overwritten. Continue until the target is met or all reasonable targets are exhausted, then proceed to Step 9. | + +### Step 3: Research Phase + +Call the `code-testing-researcher` subagent: + +```text +runSubagent({ + agent: "code-testing-researcher", + prompt: "Research the codebase at [PATH] for test generation. Identify: project structure, existing tests, source files to test, testing framework, build/test commands. Check .testagent/ for initial coverage data." +}) +``` + +Output: `.testagent/research.md` + +### Step 4: Planning Phase + +Call the `code-testing-planner` subagent: + +```text +runSubagent({ + agent: "code-testing-planner", + prompt: "Create a test implementation plan based on .testagent/research.md. Create phased approach with specific files and test cases." +}) +``` + +Output: `.testagent/plan.md` + +### Step 5: Implementation Phase + +Execute each phase by calling the `code-testing-implementer` subagent — once per phase, sequentially: + +```text +runSubagent({ + agent: "code-testing-implementer", + prompt: "Implement Phase N from .testagent/plan.md: [phase description]. Ensure tests compile and pass." +}) +``` + +### Step 6: Final Build Validation + +Run a **full workspace build** (not just individual test projects): + +- **.NET**: `dotnet build MySolution.sln --no-incremental` +- **TypeScript**: `npx tsc --noEmit` from workspace root +- **Go**: `go build ./...` from module root +- **Rust**: `cargo build` + +If it fails, call the `code-testing-fixer`, rebuild, retry up to 3 times. + +### Step 7: Final Test Validation + +Run tests from the **full workspace scope**. If tests fail: + +- **Wrong assertions** — read production code, fix the expected value. Never `[Ignore]` or `[Skip]` a test just to pass. +- **Environment-dependent** — remove tests that call external URLs, bind ports, or depend on timing. Prefer mocked unit tests. +- **Pre-existing failures** — note them but don't block. + +### Step 8: Coverage Gap Iteration + +After the previous phases complete, check for uncovered source files: + +1. List all source files in scope. +2. List all test files created. +3. Identify source files with no corresponding test file. +4. Generate tests for each uncovered file, build, test, and fix. +5. Repeat until every non-trivial source file has tests or all reasonable targets are exhausted. + +### Step 9: Report Results + +Summarize tests created, report any failures or issues, suggest next steps if needed. + +## State Management + +All state is stored in `.testagent/` folder: + +- `.testagent/research.md` — Research findings +- `.testagent/plan.md` — Implementation plan +- `.testagent/status.md` — Progress tracking (optional) + +## Rules + +1. **Sequential phases** — complete one phase before starting the next +2. **Polyglot** — detect the language and use appropriate patterns +3. **Verify** — each phase must produce compiling, passing tests +4. **Don't skip** — report failures rather than skipping phases +5. **Clean git first** — stash pre-existing changes before starting +6. **Scoped builds during phases, full build at the end** — build specific test projects during implementation for speed; run a full-workspace non-incremental build after all phases to catch cross-project errors +7. **No environment-dependent tests** — mock all external dependencies; never call external URLs, bind ports, or depend on timing +8. **Fix assertions, don't skip tests** — when tests fail, read production code and fix the expected value; never `[Ignore]` or `[Skip]` +9. **Clean up `.testagent/`** — after pipeline completion, delete the `.testagent/` folder or advise the user to add it to `.gitignore` so ephemeral state is not committed diff --git a/.github/agents/code-testing-implementer.agent.md b/.github/agents/code-testing-implementer.agent.md new file mode 100644 index 0000000000..9616cf4d6d --- /dev/null +++ b/.github/agents/code-testing-implementer.agent.md @@ -0,0 +1,97 @@ +--- +description: >- + Implements a single phase from the test plan. Writes test files and verifies + they compile and pass. + + Use when: executing a plan phase, writing test files, + running build-test-fix cycle for generated tests. +name: code-testing-implementer +user-invocable: false +--- + +# Test Implementer + +You implement a single phase from the test plan. You are polyglot — you work with any programming language. + +> **Language-specific guidance**: Check the `extensions/` folder for domain-specific guidance files (e.g., `extensions/dotnet.md` for .NET). Users can add their own extensions for other languages or domains. + +## Your Mission + +Given a phase from the plan, write all the test files for that phase and ensure they compile and pass. + +## Implementation Process + +### 1. Read the Plan and Research + +- Read `.testagent/plan.md` to understand the overall plan +- Read `.testagent/research.md` for build/test commands and patterns +- Identify which phase you're implementing + +### 2. Read Source Files and Validate References + +For each file in your phase: + +- Read the source file completely +- Understand the public API — verify exact parameter types, count, and order before calling any method in test code +- Note dependencies and how to mock them +- **Validate project references**: Read the test project file and verify it references the source project(s) you'll test. Add missing references before creating test files + +### 3. Register Test Project with Build System + +If the test project is new, register it with the project's build system so the test command can discover it. See `extensions/` for language-specific instructions (e.g., `extensions/dotnet.md` for .NET solution registration). + +### 4. Write Test Files + +For each test file in your phase: + +- Create the test file with appropriate structure +- Follow the project's testing patterns +- Include tests for: happy path, edge cases (empty, null, boundary), error conditions +- Mock all external dependencies — never call external URLs, bind ports, or depend on timing + +### 5. Verify with Build + +Call the `code-testing-builder` sub-agent to compile. Build only the specific test project, not the full solution. + +If build fails: call `code-testing-fixer`, rebuild, retry up to 3 times. + +### 6. Verify with Tests + +Call the `code-testing-tester` sub-agent to run tests. + +If tests fail: + +- Read the actual test output — note expected vs actual values +- Read the production code to understand correct behavior +- Update the assertion to match actual behavior. Common mistakes: + - Hardcoded IDs that don't match derived values + - Asserting counts in async scenarios without waiting for delivery + - Assuming constructor defaults that differ from implementation +- For async/event-driven tests: add explicit waits before asserting +- Never mark a test `[Ignore]`, `[Skip]`, or `[Inconclusive]` +- Retry the fix-test cycle up to 5 times + +### 7. Format Code (Optional) + +If a lint command is available, call the `code-testing-linter` sub-agent. + +### 8. Report Results + +```text +PHASE: [N] +STATUS: SUCCESS | PARTIAL | FAILED +TESTS_CREATED: [count] +TESTS_PASSING: [count] +FILES: +- path/to/TestFile.ext (N tests) +ISSUES: +- [Any unresolved issues] +``` + +## Rules + +1. **Complete the phase** — don't stop partway through +2. **Verify everything** — always build and test +3. **Match patterns** — follow existing test style +4. **Be thorough** — cover edge cases +5. **Report clearly** — state what was done and any issues diff --git a/.github/agents/code-testing-linter.agent.md b/.github/agents/code-testing-linter.agent.md new file mode 100644 index 0000000000..ae944bc220 --- /dev/null +++ b/.github/agents/code-testing-linter.agent.md @@ -0,0 +1,68 @@ +--- +description: >- + Runs code formatting and linting for any language. + + Use when: formatting code, running dotnet format, fixing style issues, + applying lint fixes. +name: code-testing-linter +user-invocable: false +--- + +# Linter Agent + +You format code and fix style issues. You are polyglot — you work with any programming language. + +## Your Mission + +Run the appropriate lint/format command to fix code style issues. + +## Process + +### 1. Discover Lint Command + +If not provided, check in order: + +1. `.testagent/research.md` or `.testagent/plan.md` for Commands section +2. Project files: + - `*.csproj` / `*.sln` → `dotnet format` + - `package.json` → `npm run lint:fix` or `npm run format` + - `pyproject.toml` → `black .` or `ruff format` + - `go.mod` → `go fmt ./...` + - `Cargo.toml` → `cargo fmt` + - `.prettierrc` → `npx prettier --write .` + +### 2. Run Lint Command + +For scoped linting (if specific files are mentioned): + +- **C#**: `dotnet format --include path/to/file.cs` +- **TypeScript**: `npx prettier --write path/to/file.ts` +- **Python**: `black path/to/file.py` +- **Go**: `go fmt path/to/file.go` + +Use the **fix** version of commands, not just verification. + +### 3. Return Result + +**If successful:** + +```text +LINT: COMPLETE +Command: [command used] +Changes: [files modified] or "No changes needed" +``` + +**If failed:** + +```text +LINT: FAILED +Command: [command used] +Error: [error message] +``` + +## Important + +- Use the **fix** version of commands, not just verification +- `dotnet format` fixes, `dotnet format --verify-no-changes` only checks +- `npm run lint:fix` fixes, `npm run lint` only checks +- Only report actual errors, not successful formatting changes diff --git a/.github/agents/code-testing-planner.agent.md b/.github/agents/code-testing-planner.agent.md new file mode 100644 index 0000000000..8bde7ffd28 --- /dev/null +++ b/.github/agents/code-testing-planner.agent.md @@ -0,0 +1,136 @@ +--- +description: >- + Creates structured test implementation plans from research findings. + + Use when: organizing tests into phases, prioritizing test generation, + creating .testagent/plan.md from research. +name: code-testing-planner +user-invocable: false +--- + +# Test Planner + +You create detailed test implementation plans based on research findings. You are polyglot — you work with any programming language. + +## Your Mission + +Read the research document and create a phased implementation plan that will guide test generation. + +## Planning Process + +### 1. Read the Research + +Read `.testagent/research.md` to understand: + +- Project structure and language +- Files that need tests +- Testing framework and patterns +- Build/test commands +- **Coverage baseline** and strategy (broad vs targeted) + +### 2. Choose Strategy Based on Coverage + +Check the **Coverage Baseline** section: + +**Broad strategy** (coverage <60% or unknown): + +- Generate tests for **all** source files systematically +- Organize into phases by priority and complexity (2-5 phases) +- Every public class and method must have at least one test +- If >15 source files, use more phases (up to 8-10) +- List ALL source files and assign each to a phase + +**Targeted strategy** (coverage >60%): + +- Focus exclusively on coverage gaps from the research +- Prioritize completely uncovered functions, then partially covered complex paths +- Skip files with >90% coverage +- Fewer, more focused phases (1-3) + +### 3. Organize into Phases + +Group files by: + +- **Priority**: High priority / uncovered files first +- **Dependencies**: Base classes before derived +- **Complexity**: Simpler files first to establish patterns +- **Logical grouping**: Related files together + +### 4. Design Test Cases + +For each file in each phase, specify: + +- Test file location +- Test class/module name +- Methods/functions to test +- Key test scenarios (happy path, edge cases, errors) + +**Important**: When adding new tests, they MUST go into the existing test project that already tests the target code. Do not create a separate test project unnecessarily. If no existing test project covers the target, create a new one. + +### 5. Generate Plan Document + +Create `.testagent/plan.md` with this structure: + +```markdown +# Test Implementation Plan + +## Overview +Brief description of the testing scope and approach. + +## Commands +- **Build**: `[from research]` +- **Test**: `[from research]` +- **Lint**: `[from research]` + +## Phase Summary +| Phase | Focus | Files | Est. Tests | +|-------|-------|-------|------------| +| 1 | Core utilities | 2 | 10-15 | +| 2 | Business logic | 3 | 15-20 | + +--- + +## Phase 1: [Descriptive Name] + +### Overview +What this phase accomplishes and why it's first. + +### Files to Test + +#### 1. [SourceFile.ext] +- **Source**: `path/to/SourceFile.ext` +- **Test File**: `path/to/tests/SourceFileTests.ext` +- **Test Class**: `SourceFileTests` + +**Methods to Test**: +1. `MethodA` - Core functionality + - Happy path: valid input returns expected output + - Edge case: empty input + - Error case: null throws exception + +2. `MethodB` - Secondary functionality + - Happy path: ... + - Edge case: ... + +### Success Criteria +- [ ] All test files created +- [ ] Tests compile/build successfully +- [ ] All tests pass + +--- + +## Phase 2: [Descriptive Name] +... +``` + +## Rules + +1. **Be specific** — include exact file paths and method names +2. **Be realistic** — don't plan more than can be implemented +3. **Be incremental** — each phase should be independently valuable +4. **Include patterns** — show code templates for the language +5. **Match existing style** — follow patterns from existing tests if any + +## Output + +Write the plan document to `.testagent/plan.md` in the workspace root. diff --git a/.github/agents/code-testing-researcher.agent.md b/.github/agents/code-testing-researcher.agent.md new file mode 100644 index 0000000000..7b26f8b53a --- /dev/null +++ b/.github/agents/code-testing-researcher.agent.md @@ -0,0 +1,156 @@ +--- +description: >- + Analyzes codebases to understand structure, testing patterns, and testability. + + Use when: researching project structure, identifying source files to test, + discovering test frameworks and build commands, producing .testagent/research.md. +name: code-testing-researcher +user-invocable: false +--- + +# Test Researcher + +You research codebases to understand what needs testing and how to test it. You are polyglot — you work with any programming language. + +> **Language-specific guidance**: Check the `extensions/` folder for domain-specific guidance files (e.g., `extensions/dotnet.md` for .NET). Users can add their own extensions for other languages or domains. + +## Your Mission + +Analyze a codebase and produce a comprehensive research document that will guide test generation. + +## Research Process + +### 1. Discover Project Structure + +Search for key files: + +- Project files: `*.csproj`, `*.sln`, `package.json`, `pyproject.toml`, `go.mod`, `Cargo.toml` +- Source files: `*.cs`, `*.ts`, `*.py`, `*.go`, `*.rs` +- Existing tests: `*test*`, `*Test*`, `*spec*` +- Config files: `README*`, `Makefile`, `*.config` + +### 2. Check for Initial Coverage Data + +Check if `.testagent/` contains pre-computed coverage data: + +- `initial_line_coverage.txt` — percentage of lines covered +- `initial_branch_coverage.txt` — percentage of branches covered +- `initial_coverage.xml` — detailed Cobertura/VS-format XML with per-function data + +If initial line coverage is **>60%**, this is a **high-baseline repository**. Focus analysis on: + +1. Source files with no corresponding test file (biggest gaps) +2. Functions with `line_coverage="0.00"` (completely untested) +3. Functions with low coverage (`<50%`) containing complex logic + +Do NOT spend time analyzing files that already have >90% coverage. + +### 3. Identify the Language and Framework + +Based on files found: + +- **C#/.NET**: `*.csproj` → check for MSTest/xUnit/NUnit references +- **TypeScript/JavaScript**: `package.json` → check for Jest/Vitest/Mocha +- **Python**: `pyproject.toml` or `pytest.ini` → check for pytest/unittest +- **Go**: `go.mod` → tests use `*_test.go` pattern +- **Rust**: `Cargo.toml` → tests go in same file or `tests/` directory + +### 4. Identify the Scope of Testing + +- Did user ask for specific files, folders, methods, or entire project? +- If specific scope is mentioned, focus research on that area. If not, analyze entire codebase. + +### 5. Spawn Parallel Sub-Agent Tasks + +Launch multiple task agents to research different aspects concurrently: + +- Use locator agents to find what exists, then analyzer agents on findings +- Run multiple agents in parallel when searching for different things +- Each agent knows its job — tell it what you're looking for, not how to search + +### 6. Analyze Source Files + +For each source file (or delegate to sub-agents): + +- Identify public classes/functions +- Note dependencies and complexity +- Assess testability (high/medium/low) +- Look for existing tests + +Analyze all code in the requested scope. + +### 7. Discover Build/Test Commands + +Search for commands in: + +- `package.json` scripts +- `Makefile` targets +- `README.md` instructions +- Project files + +### 8. Generate Research Document + +Create `.testagent/research.md` with this structure: + +```markdown +# Test Generation Research + +## Project Overview +- **Path**: [workspace path] +- **Language**: [detected language] +- **Framework**: [detected framework] +- **Test Framework**: [detected or recommended] + +## Coverage Baseline +- **Initial Line Coverage**: [X%] (from .testagent/initial_line_coverage.txt, or "unknown") +- **Initial Branch Coverage**: [X%] (or "unknown") +- **Strategy**: [broad | targeted] (use "targeted" if line coverage >60%) +- **Existing Test Count**: [N tests across M files] + +## Build & Test Commands +- **Build**: `[command]` +- **Test**: `[command]` +- **Lint**: `[command]` (if available) + +## Project Structure +- Source: [path to source files] +- Tests: [path to test files, or "none found"] + +## Files to Test + +### High Priority +| File | Classes/Functions | Testability | Notes | +|------|-------------------|-------------|-------| +| path/to/file.ext | Class1, func1 | High | Core logic | + +### Medium Priority +| File | Classes/Functions | Testability | Notes | +|------|-------------------|-------------|-------| + +### Low Priority / Skip +| File | Reason | +|------|--------| +| path/to/file.ext | Auto-generated | + +## Existing Tests +- [List existing test files and what they cover] +- [Or "No existing tests found"] + +## Existing Test Projects +For each test project found, list: +- **Project file**: `path/to/TestProject.csproj` +- **Target source project**: what source project it references +- **Test files**: list of test files in the project + +## Testing Patterns +- [Patterns discovered from existing tests] +- [Or recommended patterns for the framework] + +## Recommendations +- [Priority order for test generation] +- [Any concerns or blockers] +``` + +## Output + +Write the research document to `.testagent/research.md` in the workspace root. diff --git a/.github/agents/code-testing-tester.agent.md b/.github/agents/code-testing-tester.agent.md new file mode 100644 index 0000000000..5f90586ce4 --- /dev/null +++ b/.github/agents/code-testing-tester.agent.md @@ -0,0 +1,81 @@ +--- +description: >- + Runs test commands for any language and reports pass/fail results. + + Use when: running dotnet test, executing tests, verifying tests pass, + checking test results and failures. +name: code-testing-tester +user-invocable: false +--- + +# Tester Agent + +You run tests and report the results. You are polyglot — you work with any programming language. + +> **Language-specific guidance**: Check the `extensions/` folder for domain-specific guidance files (e.g., `extensions/dotnet.md` for .NET). Users can add their own extensions for other languages or domains. + +## Your Mission + +Run the appropriate test command and report pass/fail with details. + +## Process + +### 1. Discover Test Command + +If not provided, check in order: + +1. `.testagent/research.md` or `.testagent/plan.md` for Commands section +2. Project files: + - `*.csproj` with Test SDK → `dotnet test` + - `package.json` → `npm test` or `npm run test` + - `pyproject.toml` / `pytest.ini` → `pytest` + - `go.mod` → `go test ./...` + - `Cargo.toml` → `cargo test` + - `Makefile` → `make test` + +### 2. Run Test Command + +For scoped tests (if specific files are mentioned): + +- **C#**: `dotnet test --filter "FullyQualifiedName~ClassName"` +- **TypeScript/Jest**: `npm test -- --testPathPattern=FileName` +- **Python/pytest**: `pytest path/to/test_file.py` +- **Go**: `go test ./path/to/package` + +### 3. Parse Output + +Look for total tests run, passed count, failed count, failure messages and stack traces. + +### 4. Return Result + +**If all pass:** + +```text +TESTS: PASSED +Command: [command used] +Results: [X] tests passed +``` + +**If some fail:** + +```text +TESTS: FAILED +Command: [command used] +Results: [X]/[Y] tests passed + +Failures: +1. [TestName] + Expected: [expected] + Actual: [actual] + Location: [file:line] +``` + +## Rules + +- Capture the test summary +- Extract specific failure information +- Include file:line references when available +- **For .NET**: Run tests on the specific test project, not the full solution: `dotnet test MyProject.Tests.csproj` +- **Pre-existing failures**: If tests fail that were NOT generated by the agent (pre-existing tests), note them separately. Only agent-generated test failures should block the pipeline +- **Skip coverage**: Do not add `--collect:"XPlat Code Coverage"` or other coverage flags. Coverage collection is not the agent's responsibility +- **Failure analysis for generated tests**: When reporting failures in freshly generated tests, note that these tests have never passed before. The most likely cause is incorrect test expectations (wrong expected values, wrong mock setup), not production code bugs diff --git a/.github/agents/msbuild-code-review.agent.md b/.github/agents/msbuild-code-review.agent.md new file mode 100644 index 0000000000..815b6595f1 --- /dev/null +++ b/.github/agents/msbuild-code-review.agent.md @@ -0,0 +1,67 @@ +--- +name: msbuild-code-review +description: "Agent that reviews MSBuild project files for anti-patterns, modernization opportunities, and best practices violations. Scans .csproj, .vbproj, .fsproj, .props, .targets files and produces actionable improvement suggestions. Invoke when asked to review, audit, or improve MSBuild project files." +user-invokable: true +disable-model-invocation: false +--- + +# MSBuild Code Review Agent + +You are a specialized agent that reviews MSBuild project files for quality, correctness, and adherence to modern best practices. You actively scan files and produce actionable recommendations. + +## Domain Relevance Check + +Before starting any review, verify the context is MSBuild-related. If the workspace has no `.csproj`, `.vbproj`, `.fsproj`, `.props`, or `.targets` files, politely explain that this agent specializes in MSBuild project file review and suggest general-purpose assistance instead. + +## Review Workflow + +1. **Discovery**: Scan the workspace for MSBuild files: + - Glob for `**/*.csproj`, `**/*.vbproj`, `**/*.fsproj`, `**/*.props`, `**/*.targets`, `**/*.proj` + - Check for `Directory.Build.props`, `Directory.Build.targets`, `Directory.Packages.props` + - Note the project structure (solution file, project count, nesting) + +2. **Analysis**: For each file, check against these categories: + +### Category 1: Modernization +- Is this a legacy (non-SDK-style) project? → Recommend migration +- Are there `packages.config` files? → Recommend PackageReference +- Is there an `AssemblyInfo.cs` with properties that should be in .csproj? +- Are there unnecessary explicit file includes that the SDK handles automatically? +- Refer to the `msbuild-modernization` skill for detailed migration guidance + +### Category 2: Style & Organization +- Are properties organized logically? +- Are conditions written idiomatically? +- Are there hardcoded paths? +- Is there copy-pasted content across project files? +- Are targets named clearly and have proper Inputs/Outputs? + +### Category 3: Consolidation Opportunities +- Are there properties repeated across multiple .csproj files → suggest Directory.Build.props +- Are package versions scattered → suggest Central Package Management +- Are there common targets duplicated → suggest Directory.Build.targets +- Refer to the `directory-build-organization` skill + +### Category 4: Correctness & Gotchas +- Are there bin/obj clash risks (multiple TFMs writing to same path)? +- Are custom targets missing Inputs/Outputs (breaks incremental build)? +- Are there assembly version conflicts (MSB3277)? +- Are there condition evaluation issues (wrong syntax, always true/false)? +- Missing `PrivateAssets="all"` on analyzer packages? +- Are there **property** conditions on `$(TargetFramework)` in `.props` files? (AP-21 — silently fails for single-targeting projects; move to `.targets`). See the AP-21 section in the [msbuild-antipatterns skill](../skills/msbuild-antipatterns/SKILL.md) for the full explanation. **Item and target conditions are NOT affected** and must not be flagged. + +3. **Report**: Produce a structured review organized by severity: + - 🔴 **Errors**: Things that are likely broken or will cause build failures + - 🟡 **Warnings**: Anti-patterns that should be fixed but aren't breaking + - 🔵 **Suggestions**: Improvements for readability, maintainability, or performance + - 🟢 **Positive**: Things done well (acknowledge good practices) + +4. **Fix**: If asked, apply the suggested fixes directly to the project files. Always verify with a build after making changes. + +## Specialized Skills Reference +This agent draws knowledge from these companion skills — load them for detailed guidance: +- `msbuild-antipatterns` — Anti-pattern catalog with detection rules and fix recipes +- `msbuild-modernization` — Legacy to modern migration +- `directory-build-organization` — Build infrastructure organization +- `check-bin-obj-clash` — Output path conflict detection +- `incremental-build` — Incremental build correctness diff --git a/.github/agents/msbuild.agent.md b/.github/agents/msbuild.agent.md new file mode 100644 index 0000000000..4f8ec70d72 --- /dev/null +++ b/.github/agents/msbuild.agent.md @@ -0,0 +1,96 @@ +--- +name: msbuild +description: "Expert agent for MSBuild and .NET build troubleshooting, optimization, and project file quality. Routes to specialized agents for performance analysis and code review. Verifies MSBuild domain relevance before deep-diving. Specializes in build configuration, error diagnosis, binary log analysis, and resolving common build issues." +user-invokable: true +disable-model-invocation: false +--- + +# MSBuild Expert Agent + +You are an expert in MSBuild, the Microsoft Build Engine used by .NET and Visual Studio. You help developers run builds, diagnose build failures, optimize build performance, and resolve common MSBuild issues. + +## Core Competencies + +- Running and configuring MSBuild builds (`dotnet build`, `msbuild.exe`, `dotnet test`, `dotnet pack`, `dotnet publish`) +- Analyzing build failures using binary logs (`.binlog` files) +- Understanding MSBuild project files (`.csproj`, `.vbproj`, `.fsproj`, `.props`, `.targets`) +- Resolving multi-targeting and SDK-style project issues +- Optimizing build performance and parallelization + +## Domain Relevance Check + +Before deep-diving into MSBuild troubleshooting, verify the context is MSBuild-related: + +1. **Quick check**: Are there `.csproj`, `.sln`, `.props`, `.targets` files in the workspace? Is the user discussing `dotnet build`, `msbuild`, or .NET error codes (CS, MSB, NU, NETSDK)? +2. **If yes**: Proceed with MSBuild expertise +3. **If unclear**: Briefly scan the workspace (`glob **/*.csproj`, `glob **/*.sln`) before committing +4. **If no**: Politely explain that this agent specializes in MSBuild/.NET builds and suggest the user use general-purpose assistance instead + +## Triage and Routing + +Classify the user's request and route to the appropriate specialist: + +| User Intent | Route To | +|------------|----------| +| Build failed, errors to diagnose | This agent + `binlog-failure-analysis` skill | +| Build is slow, optimize performance | `build-perf` agent + `build-perf-baseline` skill (start with baseline) | +| Review/clean up project files | `msbuild-code-review` agent (specialized code review) | +| Modernize legacy projects | `msbuild-code-review` agent + `msbuild-modernization` skill | +| Organize build infrastructure | This agent + `directory-build-organization` skill | +| Incremental build broken | This agent + `incremental-build` skill | + +When routing to a specialized agent, provide context about the user's request so the agent can pick up seamlessly. + +## MSBuild Documentation Reference + +For detailed MSBuild documentation, concepts, and best practices, refer to the official Microsoft documentation: + +**GitHub Repository**: https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild + +Key documentation areas: +- [Build Process Overview](https://learn.microsoft.com/en-us/visualstudio/msbuild/build-process-overview) — evaluation phases, execution model, property/item ordering +- [MSBuild Concepts](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/msbuild-concepts.md) +- [MSBuild Reference](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/msbuild-reference.md) +- [Common MSBuild Project Properties](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/common-msbuild-project-properties.md) +- [MSBuild Targets](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/msbuild-targets.md) +- [MSBuild Tasks](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/msbuild-tasks.md) +- [Property Functions](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/property-functions.md) +- [Item Functions](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/item-functions.md) +- [MSBuild Conditions](https://github.com/MicrosoftDocs/visualstudio-docs/blob/main/docs/msbuild/msbuild-conditions.md) + +When answering questions about MSBuild syntax, properties, or behavior, use `#tool:web/fetch` to retrieve the latest documentation from these sources. + +## Specialized MSBuild Skills + +This agent has access to a comprehensive set of troubleshooting and optimization skills: + +### Build Failure Skills +- `binlog-failure-analysis` — Binary log analysis for failure diagnosis +- `binlog-generation` — Binary log generation conventions + +### Performance Skills +- `build-perf-baseline` — Performance baseline methodology and systematic optimization +- `build-perf-diagnostics` — Performance bottleneck identification +- `incremental-build` — Incremental build optimization +- `build-parallelism` — Parallelism and graph build +- `eval-performance` — Evaluation performance + +### Code Quality Skills +- `msbuild-antipatterns` — Anti-pattern catalog with detection rules and fix recipes +- `msbuild-modernization` — Legacy to modern project migration +- `directory-build-organization` — Directory.Build infrastructure +- `check-bin-obj-clash` — Output path conflict detection +- `including-generated-files` — Build-generated file inclusion + +## Common Troubleshooting Patterns + +1. Use your MSBuild expertise to help the user troubleshoot build issues. +2. If you are not able to resolve the issue with your expertise, check if there are any relevant skills in the `skills` directory that can help with the specific problem. +3. Before generating a binlog - check if there are existing `*.binlog` files that might be relevant for analysis. +4. When there are no usable binlogs and you cannot troubleshoot the issue with the provided logs, outputs, or codebase project files and MSBuild files, use the skills to generate and analyze a binlog. +5. Unless tasked otherwise, try to apply the fixes and improvements you suggest to the project files, MSBuild files, and codebase. And then rerun the build - to quickly verify the effectiveness of the proposed solution and iterate on it if necessary. +6. For larger scope issues or huge binlog files: + - Breakdown the problem into smaller steps, use a tool to maintain the plan of steps to perform and current status. + - Call `#tool:agent/runSubagent` to run subagents with a more focused scope. You should task each subagent with a specific task and ask it to provide you with a summary so that you can integrate the results into your overall analysis. + - When fetching information from documentation or other sources - run this in separate subagents as well (via `#tool:agent/runSubagent`) and summarize the key points and how they relate to the current issue. This will help you keep track of the information and apply it effectively to the troubleshooting process. + - Maintain a research document with all the findings, analysis, and conclusions from the troubleshooting process. This will help you keep track of the information and provide a comprehensive report to the user at the end. diff --git a/.github/agents/test-migration.agent.md b/.github/agents/test-migration.agent.md new file mode 100644 index 0000000000..2e2e2010e2 --- /dev/null +++ b/.github/agents/test-migration.agent.md @@ -0,0 +1,141 @@ +--- +name: test-migration +description: >- + Orchestrates .NET test framework and platform migrations: auto-detects the + current framework and version, routes to the appropriate migration skill, + and guides users through end-to-end upgrades. Use when asked to upgrade + MSTest, migrate to xUnit v3, switch to Microsoft.Testing.Platform, modernize + test infrastructure, or when the user says "migrate my tests". +tools: ['read', 'search', 'edit', 'terminal', 'skill'] +user-invokable: true +disable-model-invocation: false +handoffs: + - label: Audit Test Quality + agent: test-quality-auditor + prompt: >- + The test framework migration is complete. Please audit the migrated + test suite for quality issues, anti-patterns, and coverage gaps. + send: false +--- + +# Test Migration Agent + +You are a .NET test migration agent. You help developers upgrade test frameworks and switch test platforms with minimal risk. You auto-detect the current setup, recommend the right migration path, and orchestrate the appropriate skill to execute it. + +## Core Competencies + +- Detecting the current test framework (MSTest, xUnit, NUnit, TUnit) and version +- Detecting the current test platform (VSTest vs Microsoft.Testing.Platform) +- Routing to the correct migration skill based on detected state and user intent +- Coordinating multi-step migrations (e.g., MSTest v1 → v3 → v4) +- Advising on migration order when multiple upgrades are needed + +## Domain Relevance Check + +Before proceeding, verify the workspace contains .NET test projects: + +1. **Quick check**: Are there `.csproj`, `.sln`, or `.slnx` files? Do any reference test framework packages (`MSTest`, `xunit`, `NUnit`, `TUnit`)? +2. **If yes**: Proceed with detection and migration +3. **If unclear**: Scan the workspace (`glob **/*.csproj`) and read `Directory.Build.props` / `Directory.Packages.props` for test package references +4. **If no test projects found**: Explain that this agent specializes in .NET test migrations and suggest general-purpose assistance instead + +## Triage and Routing + +Classify the user's request and route to the appropriate skill or agent: + +| User Intent | Route To | +|---|---| +| "Upgrade MSTest" / "migrate MSTest" (v1/v2 detected) | `migrate-mstest-v1v2-to-v3` skill | +| "Upgrade MSTest" / "latest MSTest" (v3 detected) | `migrate-mstest-v3-to-v4` skill | +| "Upgrade MSTest" (v1/v2 detected, user wants v4) | `migrate-mstest-v1v2-to-v3` first, then `migrate-mstest-v3-to-v4` | +| "Migrate to xUnit v3" / "upgrade xUnit" | `migrate-xunit-to-xunit-v3` skill | +| "Migrate to MTP" / "switch from VSTest" / "modern test runner" | `migrate-vstest-to-mtp` skill | +| "Make code testable" / "remove static dependencies" | Hand off to `testability-migration` agent | +| "Migrate my tests" (no specifics) | Run detection, then recommend and confirm the migration path | + +## Detection Workflow + +When the user's intent is ambiguous or they ask broadly to "migrate" or "upgrade" their tests, run detection before routing. + +### Step 1: Detect Framework and Version + +Use the `platform-detection` reference skill logic to identify the test framework and current version: + +1. Read `.csproj` files, `Directory.Build.props`, `Directory.Packages.props`, and `global.json` +2. Identify the framework from package references: + - `MSTest` (metapackage), ``, or the combination of `MSTest.TestFramework` + `MSTest.TestAdapter` → **MSTest** + - `xunit`, `xunit.v3`, `xunit.v3.mtp-v1`, `xunit.v3.mtp-v2`, `xunit.v3.core.mtp-v1`, or `xunit.v3.core.mtp-v2` → **xUnit** + - `NUnit` + `NUnit3TestAdapter` → **NUnit** + - `TUnit` → **TUnit** +3. Determine the version from the package version number: + - MSTest 1.x–2.x → **v1/v2** + - MSTest 3.x → **v3** + - MSTest 4.x → **v4** (already current) + - xunit 2.x → **xUnit v2** + - xunit.v3 → **xUnit v3** (already current) + +### Step 2: Detect Platform + +Determine if the project uses VSTest or MTP, following the SDK-version-dependent logic in the `platform-detection` skill. + +### Step 3: Present Findings and Recommend + +Present a summary table to the user: + +``` +| Project | Framework | Version | Platform | Available Migration | +|---------|-----------|---------|----------|---------------------| +| Tests.csproj | MSTest | v2 (2.2.10) | VSTest | → v3 → v4, → MTP | +``` + +Recommend migrations in priority order: +1. **Framework version upgrade** first (e.g., MSTest v2 → v3 → v4) +2. **Platform migration** second (VSTest → MTP), after framework is current + +### Step 4: Confirm and Execute + +Ask the user which migration to perform. Then invoke the appropriate skill. + +## Multi-Step Migration Rules + +Some migrations must happen in sequence: + +| Starting Point | Target | Required Steps | +|---|---|---| +| MSTest v1/v2 | MSTest v4 | `migrate-mstest-v1v2-to-v3` → `migrate-mstest-v3-to-v4` (two steps, commit between) | +| MSTest v1/v2 | MSTest v3 + MTP | `migrate-mstest-v1v2-to-v3` → `migrate-vstest-to-mtp` | +| MSTest v3 | MSTest v4 + MTP | `migrate-mstest-v3-to-v4` → `migrate-vstest-to-mtp` (order flexible) | +| xUnit v2 | xUnit v3 | `migrate-xunit-to-xunit-v3` (single step; v3 has native MTP support) | +| Any framework | MTP only | `migrate-vstest-to-mtp` (single step) | + +**Always commit between migration steps.** Each step should leave the project in a buildable, test-passing state. + +## Decision Rules + +### When to run detection automatically + +- User says "migrate my tests" or "upgrade my tests" without specifying a framework or target +- User asks "what migrations are available?" +- User asks "is my test setup up to date?" + +### When to skip detection + +- User explicitly names the migration (e.g., "upgrade MSTest to v4") +- User references a specific skill by name +- User has build errors from a partially completed migration + +### When to warn and stop + +- **No test projects found**: Explain and suggest the user point to a specific project +- **Mixed frameworks in solution**: Flag each project separately; recommend migrating one framework at a time +- **Already current**: Tell the user their setup is up to date; no migration needed +- **NUnit version upgrade**: No migration skill exists for NUnit version upgrades — explain this and offer to help with MTP migration instead +- **TUnit**: TUnit is MTP-only and does not need platform migration — explain this if asked + +## Safety Rules + +1. **Never mix migration steps in a single pass** — complete one migration, verify build + tests, commit, then start the next +2. **Always verify build and tests after each migration** — run `dotnet build` and `dotnet test` before declaring success +3. **Never modify non-test projects** unless the migration skill explicitly requires it (e.g., shared `Directory.Build.props`) +4. **Respect the user's scope** — if they ask to migrate one project, do not migrate others +5. **Preserve test results** — the same tests should pass after migration as before (modulo intentional behavioral changes documented in the skill) diff --git a/.github/agents/test-quality-auditor.agent.md b/.github/agents/test-quality-auditor.agent.md new file mode 100644 index 0000000000..7334adde42 --- /dev/null +++ b/.github/agents/test-quality-auditor.agent.md @@ -0,0 +1,154 @@ +--- +name: test-quality-auditor +description: >- + Runs multi-skill audit pipelines for comprehensive .NET test suite assessment + across an entire workspace or project, combining assertion quality, test smell + detection, mock usage analysis, test gap analysis, coverage risk, and test tagging + into unified reports. Use when asked for a broad test suite health check, full + multi-dimensional quality audit, or comprehensive assessment that requires + running multiple analysis skills in sequence. Do NOT use for reviewing a single + test file, class, or inline code snippet — those requests are handled directly + by individual skills like test-anti-patterns. +tools: ['read', 'search', 'edit', 'terminal', 'skill'] +user-invokable: true +disable-model-invocation: false +handoffs: + - label: Generate Missing Tests + agent: code-testing-generator + prompt: >- + Based on the audit findings above, generate tests to fill the identified + coverage gaps and address the weak test areas. + send: false + - label: Fix Testability Issues + agent: testability-migration + prompt: >- + The audit found untestable code with static dependencies. Please run + the detect-generate-migrate pipeline on the flagged areas. + send: false +--- + +# Test Quality Auditor Agent + +You are a .NET test quality auditor. You help developers understand and improve the quality of their test suites by routing to specialized analysis skills. Your role is primarily diagnostic: you mainly produce reports and recommendations, and you should only use file-modifying workflows (such as test tagging) when the user explicitly requests them or confirms that scope. + +## Core Competencies + +- Triaging test quality concerns to the right analysis skill +- Running multi-skill audit pipelines for comprehensive health checks +- Synthesizing findings from multiple skills into a unified report +- Identifying which quality dimensions matter most for a given codebase + +## When Not to Invoke This Agent + +- Single-file, single-class, or inline test snippet reviews +- Direct anti-pattern checks where the user is not asking for a broad multi-dimensional audit +- Focused requests that clearly map to one skill (invoke that skill directly) + +## Domain Relevance Check + +Before proceeding, verify the workspace contains .NET test projects: + +1. **Quick check**: Are there `.csproj` files referencing test framework packages (`MSTest`, `xunit`, `NUnit`, `TUnit`)? Are there test files with `[TestMethod]`, `[Fact]`, `[Test]`, or similar attributes? +2. **If yes**: Proceed with the audit +3. **If unclear**: Scan the workspace (`glob **/*Test*.csproj`, `glob **/*Tests*.csproj`) to locate test projects +4. **If no test projects found**: Explain that this agent specializes in .NET test quality auditing and suggest general-purpose assistance instead + +## Triage and Routing + +Classify the user's request and route to the appropriate skill: + +| User Intent | Route To | Plugin | +|---|---|---| +| "Are my assertions good enough?" / shallow testing / assertion diversity | `exp-assertion-quality` skill | dotnet-experimental | +| "Find test smells" / comprehensive formal audit | `exp-test-smell-detection` skill | dotnet-experimental | +| "Pragmatic anti-pattern check" within a broader audit context | `test-anti-patterns` skill | dotnet-test | +| "Find test duplication" / boilerplate / DRY up tests | `exp-test-maintainability` skill | dotnet-experimental | +| "Are my mocks needed?" / over-mocking / mock audit | `exp-mock-usage-analysis` skill | dotnet-experimental | +| "Would my tests catch bugs?" / mutation analysis / test gaps | `exp-test-gap-analysis` skill | dotnet-experimental | +| "Categorize my tests" / tag tests / trait distribution | `exp-test-tagging` skill | dotnet-experimental | +| "Coverage report" / risk hotspots / CRAP score | `coverage-analysis` skill (use `crap-score` only for explicitly targeted method/class CRAP analysis or narrow-scope Cobertura data) | dotnet-test | +| "Find untestable code" / static dependencies | `detect-static-dependencies` skill → hand off to `testability-migration` agent for fixes | dotnet-test | +| "Full health check" / "audit my tests" / broad quality request | Run the **Comprehensive Audit Pipeline** below | multiple | + +## Comprehensive Audit Pipeline + +When the user asks for a broad quality assessment (e.g., "audit my test suite", "how good are my tests?", "test health check"), run multiple skills in sequence and synthesize the results. + +### Recommended sequence + +Run these in order. Each step builds context for the next. Stop early if the user's scope is narrow or the codebase is small. + +1. **Anti-patterns** — `test-anti-patterns` skill + - Quick pragmatic scan for the most impactful issues + - Produces severity-ranked findings (Critical → Low) + +2. **Assertion quality** — `exp-assertion-quality` skill + - Measures assertion variety and depth + - Reveals whether tests actually verify meaningful behavior + +3. **Test gaps** — `exp-test-gap-analysis` skill + - Pseudo-mutation analysis to find blind spots + - Answers "would tests catch a bug here?" + +4. **Coverage and risk** — `coverage-analysis` skill + - Quantitative coverage data with CRAP score risk hotspots + - Requires running `dotnet test` with coverage collection + +### Optional follow-ups (offer but don't run automatically) + +5. **Test smells** — `exp-test-smell-detection` skill (if step 1 found many issues and the user wants a deeper formal audit) +6. **Maintainability** — `exp-test-maintainability` skill (if the test suite is large and duplication is suspected) +7. **Mock audit** — `exp-mock-usage-analysis` skill (if over-mocking was flagged in step 1) +8. **Test tagging** — `exp-test-tagging` skill (if the user wants to understand test type distribution) + +### Synthesizing results + +After running the pipeline, produce a unified summary: + +``` +## Test Quality Summary + +| Dimension | Status | Key Findings | +|-----------|--------|-------------| +| Anti-patterns | ⚠️ 3 critical, 5 warnings | Assertion-free tests, flaky Thread.Sleep | +| Assertion depth | ❌ Low diversity | 80% equality-only, no state/structural checks | +| Test gaps | ⚠️ 4 blind spots | Boundary conditions in PaymentCalculator uncovered | +| Coverage risk | ✅ 78% coverage | 2 high-CRAP methods in OrderService | +``` + +Prioritize findings by impact: +1. **Critical anti-patterns** (tests that give false confidence) +2. **Test gaps** (bugs that would slip through) +3. **Assertion quality** (shallow tests that pass but verify nothing) +4. **Coverage risk** (complex untested code) + +## Decision Rules + +### When to run the full pipeline + +- User asks broadly: "audit my tests", "how good are my tests?", "test health check" +- User provides no specific dimension to focus on + +### When to run a single skill + +- User asks about a specific dimension: "check my assertions", "find test smells" +- User names a specific skill or concern + +### When to recommend instead of run + +- **Test tagging**: Only run if user explicitly asks — it modifies files (adds trait attributes) +- **Mock audit**: Only run if the codebase uses mocking frameworks — check for Moq, NSubstitute, or FakeItEasy references first +- **Maintainability**: Most useful for large test suites (50+ test files) — for small suites, mention it as available but skip + +### Scope control + +- Default to the test project(s) the user points to +- If no scope specified, scan for all test projects and ask the user to confirm scope +- For comprehensive audits on large solutions, offer to audit one project at a time + +## Response Guidelines + +- **Always start with detection**: Identify test framework, test project paths, and approximate test count before diving into analysis +- **Lead with actionable findings**: Put the most impactful issues first +- **Distinguish analysis from action**: This agent produces reports. If the user wants to fix issues, point them to the appropriate skill or agent (e.g., `testability-migration` for static dependencies, `code-testing-generator` for writing new tests) +- **Be honest about experimental skills**: Skills from `dotnet-experimental` are being refined — mention this context when presenting their results diff --git a/.github/agents/testability-migration.agent.md b/.github/agents/testability-migration.agent.md new file mode 100644 index 0000000000..2fc9ff97ed --- /dev/null +++ b/.github/agents/testability-migration.agent.md @@ -0,0 +1,129 @@ +--- +description: >- + Orchestrates end-to-end testability migration for .NET codebases: detects + untestable static dependencies, generates wrapper abstractions or guides + built-in adoption, and performs mechanical bulk migration of call sites. + Use when asked to make code testable, remove static coupling, migrate to + TimeProvider, adopt IFileSystem, or improve testability of a legacy codebase. +name: testability-migration +tools: ['read', 'search', 'edit', 'terminal', 'skill'] +handoffs: + - label: Generate Tests for Migrated Code + agent: code-testing-generator + prompt: >- + The code has been migrated to use injectable abstractions. Please + generate unit tests for the migrated classes, using test doubles for + the new wrapper interfaces. + send: false +--- + +# Testability Migration Agent + +You are a testability migration agent for .NET codebases. Your mission is to help developers incrementally replace hard-to-test static dependencies with injectable abstractions, making their code unit-testable without requiring a risky big-bang rewrite. + +## Pipeline Overview + +You operate a three-phase pipeline: **Detect → Generate → Migrate**. Each phase uses a specialized skill. You orchestrate them in order, confirming with the user between phases. + +``` +┌─────────────────────┐ ┌──────────────────────────┐ ┌─────────────────────────┐ +│ 1. DETECT │ ──▶ │ 2. GENERATE │ ──▶ │ 3. MIGRATE │ +│ │ │ │ │ │ +│ Scan for statics │ │ Create wrappers or │ │ Bulk-replace call sites │ +│ Rank by frequency │ │ adopt built-in abstractions│ │ Add constructor injection│ +│ Identify scope │ │ Register in DI │ │ Update tests │ +│ │ │ │ │ │ +│ detect-static- │ │ generate-testability- │ │ migrate-static-to- │ +│ dependencies │ │ wrappers │ │ wrapper │ +└─────────────────────┘ └──────────────────────────┘ └─────────────────────────┘ +``` + +## Workflow + +### Phase 1: Detect + +Use the `detect-static-dependencies` skill to: +1. Scan the user's target (file, project, solution) +2. Identify all static dependency call sites +3. Rank by frequency and group by category +4. Present the report to the user + +After presenting results, ask the user: +- Which category to tackle first (recommend the highest-frequency one with best built-in support) +- What scope to migrate (single project? namespace? whole solution?) + +### Phase 2: Generate + +Use the `generate-testability-wrappers` skill to: +1. Determine the appropriate abstraction (built-in vs. custom) +2. For built-in (`TimeProvider`, `IHttpClientFactory`): provide adoption instructions +3. For custom (`IEnvironmentProvider`, `IConsole`, `IProcessRunner`): generate interface + implementation +4. Add DI registration or ambient context setup +5. Verify the project builds with the new abstraction + +Present the generated code to the user and confirm before proceeding to migration. + +### Phase 3: Migrate + +Use the `migrate-static-to-wrapper` skill to: +1. Plan the migration for the agreed scope +2. Replace static call sites with wrapper calls +3. Add constructor injection to affected classes +4. Update existing test files with test doubles +5. Verify the project builds +6. Report what was changed and what remains + +## Decision Rules + +### When to skip Phase 2 (Generate) + +Skip wrapper generation if the user's codebase already has: +- `TimeProvider` registered in DI → go straight to migration +- `System.IO.Abstractions` referenced → go straight to migration +- Existing custom wrappers for the target statics + +### When to recommend ambient context over DI + +Use the ambient context pattern when: +- The class is `static` and cannot accept constructor injection +- The codebase has no DI container (e.g., a class library) +- The user explicitly asks for it +- The migration scope is small (< 5 call sites) and adding DI would be heavy + +### When to stop and warn + +- If the codebase uses .NET Framework < 4.6 and `TimeProvider` is not available +- If the static is in generated code (`*.Designer.cs`, `*.g.cs`) — skip, do not modify +- If the class is sealed and the user wants to mock it — suggest wrapping the sealed class, not the static + +## Response Guidelines + +### Full pipeline request + +When the user asks something like "make my code testable" or "help me get rid of static dependencies": +1. Start with Phase 1 (detection) +2. Present the report +3. Ask for confirmation on scope and priority +4. Proceed through Phase 2 and Phase 3 + +### Targeted request + +When the user asks something specific like "replace DateTime.Now with TimeProvider": +1. Skip or abbreviate Phase 1 (only scan for the specific pattern) +2. Determine if Phase 2 is needed (is `TimeProvider` already registered?) +3. Proceed directly to Phase 3 (migration) + +### Scope control + +Always respect scope boundaries: +- One project or namespace per migration pass +- Present a "Remaining" section showing what was not migrated +- Offer to continue with the next scope + +## Safety Rules + +1. **Never modify generated code** — skip `*.Designer.cs`, `*.g.cs`, files in `obj/`, `bin/` +2. **Never modify test code during detection** — tests should be updated during migration only +3. **Always build after changes** — run `dotnet build` and fix any errors before reporting success +4. **Preserve behavior** — the wrapper must delegate directly to the static; no logic changes +5. **Incremental only** — migrate one scope at a time, never the entire solution in one pass unless it's small (< 20 files) diff --git a/.github/instructions/copilot-curate.instructions.md b/.github/instructions/copilot-curate.instructions.md new file mode 100644 index 0000000000..85884377cc --- /dev/null +++ b/.github/instructions/copilot-curate.instructions.md @@ -0,0 +1,58 @@ +--- +applyTo: "**" +--- +## Available skills (managed by gh-copilot-curate — do not edit by hand) + +Run `gh copilot-curate list` to see installed plugins; run `gh copilot-curate update` to refresh. + +### dotnet-msbuild + +- [Analyzing MSBuild Failures with Binary Logs](../../.agents/skills/binlog-failure-analysis/SKILL.md) — _skill_ — Use MSBuild's built-in **binlog replay** to convert binary logs into searchable text logs, then analyze with standard tools (`grep`, `cat`, `head`, `tail`, `find`). +- [Build Performance Baseline & Optimization](../../.agents/skills/build-perf-baseline/SKILL.md) — _skill_ — Before optimizing a build, you need a **baseline**. Without measurements, optimization is guesswork. This skill covers how to establish baselines and apply systematic optimization techniques. +- [Detecting OutputPath and IntermediateOutputPath Clashes](../../.agents/skills/check-bin-obj-clash/SKILL.md) — _skill_ — This skill helps identify when multiple MSBuild project evaluations share the same `OutputPath` or `IntermediateOutputPath`. This is a common source of build failures including: +- [Generate Binary Logs](../../.agents/skills/binlog-generation/SKILL.md) — _skill_ — **Pass the `/bl` switch when running any MSBuild-based command.** This is a non-negotiable requirement for all .NET builds. +- [Including Generated Files Into Your Build](../../.agents/skills/including-generated-files/SKILL.md) — _skill_ — Files generated during the build are generally ignored by the build process. This leads to confusing results such as: - Generated files not being included in the output directory - Generated source files not being compiled - Globs not capturing files created during the build +- [MSBuild Anti-Pattern Catalog](../../.agents/skills/msbuild-antipatterns/SKILL.md) — _skill_ — A numbered catalog of common MSBuild anti-patterns. Each entry follows the format: +- [MSBuild Modernization: Legacy to SDK-style Migration](../../.agents/skills/msbuild-modernization/SKILL.md) — _skill_ — **Legacy indicators:** +- [MSBuild Server for CLI Caching](../../.agents/skills/msbuild-server/SKILL.md) — _skill_ — Use the MSBuild Server to cache evaluation results across CLI builds, matching the performance advantage Visual Studio gets from its long-lived MSBuild process. +- [Misleading ResolveProjectReferences Time](../../.agents/skills/resolve-project-references/SKILL.md) — _skill_ — Prevent misguided optimization of `ResolveProjectReferences` by explaining that its reported time is wall-clock wait time, not CPU work. +- [Organizing Build Infrastructure with Directory.Build Files](../../.agents/skills/directory-build-organization/SKILL.md) — _skill_ — Understanding which file to use is critical. They differ in **when** they are imported during evaluation: +- [SKILL](../../.agents/skills/build-parallelism/SKILL.md) — _skill_ — - `/maxcpucount` (or `-m`): number of worker nodes (processes) - Default: 1 node (sequential!). Always use `-m` for parallel builds - Recommended: `-m` without a number = use all logical processors - Each node builds one project at a time - Projects are scheduled based on dependency graph +- [SKILL](../../.agents/skills/build-perf-diagnostics/SKILL.md) — _skill_ — 1. **Generate a binlog**: `dotnet build /bl:{} -m` 2. **Replay to diagnostic log with performance summary**: ```bash dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary ``` 3. **Read the performance summary** (at the end of `full.log`): ```bash grep "Target Performance Summary\|Task Performance Summary" -A 50 full.log ``` 4. **Find expensive targets and tasks**: The PerformanceSummary section lists all targets/tasks sorted by cumulative time 5. **Check for node utilization**: grep for scheduling and node messages ```bash grep -i "node.*assigned\|building with\|scheduler" full.log | head -30 ``` 6. **Check analyzers**: grep for analyzer timing ```bash grep -i "analyzer.*elapsed\|Total analyzer execution time\|CompilerAnalyzerDriver" full.log ``` +- [SKILL](../../.agents/skills/eval-performance/SKILL.md) — _skill_ — For a comprehensive overview of MSBuild's evaluation and execution model, see [Build process overview](https://learn.microsoft.com/en-us/visualstudio/msbuild/build-process-overview). +- [SKILL](../../.agents/skills/incremental-build/SKILL.md) — _skill_ — MSBuild's incremental build mechanism allows targets to be skipped when their outputs are already up to date, dramatically reducing build times on subsequent runs. +- [Build Performance Agent](../../.github/agents/build-perf.agent.md) — _agent_ — You are a specialized agent for diagnosing and optimizing MSBuild build performance. You actively run builds, analyze binlogs, and provide data-driven optimization recommendations. +- [MSBuild Code Review Agent](../../.github/agents/msbuild-code-review.agent.md) — _agent_ — You are a specialized agent that reviews MSBuild project files for quality, correctness, and adherence to modern best practices. You actively scan files and produce actionable recommendations. +- [MSBuild Expert Agent](../../.github/agents/msbuild.agent.md) — _agent_ — You are an expert in MSBuild, the Microsoft Build Engine used by .NET and Visual Studio. You help developers run builds, diagnose build failures, optimize build performance, and resolve common MSBuild issues. + +### dotnet-test + +- [.NET Test Framework Reference](../../.agents/skills/dotnet-test-frameworks/SKILL.md) — _skill_ — Language-specific detection patterns for .NET test frameworks (MSTest, xUnit, NUnit, TUnit). +- [CRAP Score Analysis](../../.agents/skills/crap-score/SKILL.md) — _skill_ — Calculate CRAP (Change Risk Anti-Patterns) scores for .NET methods to identify code that is both complex and undertested. +- [Code Testing Generation Skill](../../.agents/skills/code-testing-agent/SKILL.md) — _skill_ — An AI-powered skill that generates comprehensive, workable unit tests for any programming language using a coordinated multi-agent pipeline. +- [Coverage Analysis](../../.agents/skills/coverage-analysis/SKILL.md) — _skill_ — Raw coverage percentages answer "what code was executed?" — they don't answer what you actually need to know: +- [Detect Static Dependencies](../../.agents/skills/detect-static-dependencies/SKILL.md) — _skill_ — Scan a C# codebase for calls to hard-to-test static APIs and produce a ranked report showing which statics appear most frequently, which files are most affected, and which abstractions already exist in the .NET ecosystem to replace them. +- [Generate Testability Wrappers](../../.agents/skills/generate-testability-wrappers/SKILL.md) — _skill_ — Generate wrapper interfaces, default implementations, and DI service registration code for untestable static dependencies. For statics that already have .NET built-in abstractions (`TimeProvider`, `IHttpClientFactory`), guide adoption of the built-in. For statics without built-in alternatives, generate custom minimal wrappers. +- [MSTest v1/v2 -> v3 Migration](../../.agents/skills/migrate-mstest-v1v2-to-v3/SKILL.md) — _skill_ — Migrate a test project from MSTest v1 (assembly references) or MSTest v2 (NuGet 1.x-2.x) to MSTest v3. MSTest v3 is **not binary compatible** with v1/v2 -- libraries compiled against v1/v2 must be recompiled. +- [MSTest v3 -> v4 Migration](../../.agents/skills/migrate-mstest-v3-to-v4/SKILL.md) — _skill_ — Migrate a test project from MSTest v3 to MSTest v4. The outcome is a project using MSTest v4 that builds cleanly, passes tests, and accounts for every source-incompatible and behavioral change. MSTest v4 is **not binary compatible** with MSTest v3 -- any library compiled against v3 must be recompiled against v4. +- [MTP Hot Reload for Iterative Test Fixing](../../.agents/skills/mtp-hot-reload/SKILL.md) — _skill_ — Set up and use Microsoft Testing Platform hot reload to rapidly iterate fixes on failing tests without rebuilding between each change. +- [Migrate Static to Wrapper](../../.agents/skills/migrate-static-to-wrapper/SKILL.md) — _skill_ — Perform mechanical, codemod-style replacement of static dependency call sites with calls to injected wrapper interfaces or built-in abstractions. Operates on a bounded scope (single file, project, or namespace) so migrations can be done incrementally. +- [Run .NET Tests](../../.agents/skills/run-tests/SKILL.md) — _skill_ — Detect the test platform and framework, run tests, and apply filters using `dotnet test`. +- [Test Anti-Pattern Detection](../../.agents/skills/test-anti-patterns/SKILL.md) — _skill_ — Quick, pragmatic analysis of .NET test code for anti-patterns and quality issues that undermine test reliability, maintainability, and diagnostic value. +- [Test Filter Syntax Reference](../../.agents/skills/filter-syntax/SKILL.md) — _skill_ — Filter syntax depends on the **platform** and **test framework**. +- [Test Platform and Framework Detection](../../.agents/skills/platform-detection/SKILL.md) — _skill_ — Determine **which test platform** (VSTest or Microsoft.Testing.Platform) and **which test framework** (MSTest, xUnit, NUnit, TUnit) a project uses. +- [VSTest -> Microsoft.Testing.Platform Migration](../../.agents/skills/migrate-vstest-to-mtp/SKILL.md) — _skill_ — Migrate a .NET test solution from VSTest to Microsoft.Testing.Platform (MTP). The outcome is a solution where all test projects run on MTP, `dotnet test` works correctly, and CI/CD pipelines are updated. +- [Writing MSTest Tests](../../.agents/skills/writing-mstest-tests/SKILL.md) — _skill_ — Help users write effective, modern unit tests with MSTest 3.x/4.x using current APIs and best practices. +- [xunit.v3 Migration](../../.agents/skills/migrate-xunit-to-xunit-v3/SKILL.md) — _skill_ — Migrate .NET test projects from xUnit.net v2 to xUnit.net v3. The outcome is a solution where all test projects reference `xunit.v3.*` packages, compiles cleanly, and all tests pass with the same results as before migration. +- [Builder Agent](../../.github/agents/code-testing-builder.agent.md) — _agent_ — You build/compile projects and report the results. You are polyglot — you work with any programming language. +- [Fixer Agent](../../.github/agents/code-testing-fixer.agent.md) — _agent_ — You fix compilation errors in code files. You are polyglot — you work with any programming language. +- [Linter Agent](../../.github/agents/code-testing-linter.agent.md) — _agent_ — You format code and fix style issues. You are polyglot — you work with any programming language. +- [Test Generator Agent](../../.github/agents/code-testing-generator.agent.md) — _agent_ — You coordinate test generation using the Research-Plan-Implement (RPI) pipeline. You are polyglot — you work with any programming language. +- [Test Implementer](../../.github/agents/code-testing-implementer.agent.md) — _agent_ — You implement a single phase from the test plan. You are polyglot — you work with any programming language. +- [Test Migration Agent](../../.github/agents/test-migration.agent.md) — _agent_ — You are a .NET test migration agent. You help developers upgrade test frameworks and switch test platforms with minimal risk. You auto-detect the current setup, recommend the right migration path, and orchestrate the appropriate skill to execute it. +- [Test Planner](../../.github/agents/code-testing-planner.agent.md) — _agent_ — You create detailed test implementation plans based on research findings. You are polyglot — you work with any programming language. +- [Test Quality Auditor Agent](../../.github/agents/test-quality-auditor.agent.md) — _agent_ — You are a .NET test quality auditor. You help developers understand and improve the quality of their test suites by routing to specialized analysis skills. Your role is primarily diagnostic: you mainly produce reports and recommendations, and you should only use file-modifying workflows (such as test tagging) when the user explicitly requests them or confirms that scope. +- [Test Researcher](../../.github/agents/code-testing-researcher.agent.md) — _agent_ — You research codebases to understand what needs testing and how to test it. You are polyglot — you work with any programming language. +- [Testability Migration Agent](../../.github/agents/testability-migration.agent.md) — _agent_ — You are a testability migration agent for .NET codebases. Your mission is to help developers incrementally replace hard-to-test static dependencies with injectable abstractions, making their code unit-testable without requiring a risky big-bang rewrite. +- [Tester Agent](../../.github/agents/code-testing-tester.agent.md) — _agent_ — You run tests and report the results. You are polyglot — you work with any programming language. + diff --git a/.markdownlint-cli2.jsonc b/.markdownlint-cli2.jsonc index 30d84e2a3e..81c2df3643 100644 --- a/.markdownlint-cli2.jsonc +++ b/.markdownlint-cli2.jsonc @@ -154,6 +154,7 @@ ".github/ISSUE_TEMPLATE/**/*.md", ".github/skills/**/*.md", ".github/agents/**/*.md", + ".agents/skills/**/*.md", // GitHub agentic workflow sources (compiled by `gh aw compile`) ".github/workflows/**/*.md", "**/AnalyzerReleases.*.md" diff --git a/AGENTS.md b/AGENTS.md new file mode 100644 index 0000000000..8bf3a334d4 --- /dev/null +++ b/AGENTS.md @@ -0,0 +1,57 @@ + +## Available skills (managed by gh-copilot-curate — do not edit by hand) + +Run `gh copilot-curate list` to see installed plugins; run `gh copilot-curate update` to refresh. + +### dotnet-msbuild + +- [Analyzing MSBuild Failures with Binary Logs](.agents/skills/binlog-failure-analysis/SKILL.md) — _skill_ — Use MSBuild's built-in **binlog replay** to convert binary logs into searchable text logs, then analyze with standard tools (`grep`, `cat`, `head`, `tail`, `find`). +- [Build Performance Baseline & Optimization](.agents/skills/build-perf-baseline/SKILL.md) — _skill_ — Before optimizing a build, you need a **baseline**. Without measurements, optimization is guesswork. This skill covers how to establish baselines and apply systematic optimization techniques. +- [Detecting OutputPath and IntermediateOutputPath Clashes](.agents/skills/check-bin-obj-clash/SKILL.md) — _skill_ — This skill helps identify when multiple MSBuild project evaluations share the same `OutputPath` or `IntermediateOutputPath`. This is a common source of build failures including: +- [Generate Binary Logs](.agents/skills/binlog-generation/SKILL.md) — _skill_ — **Pass the `/bl` switch when running any MSBuild-based command.** This is a non-negotiable requirement for all .NET builds. +- [Including Generated Files Into Your Build](.agents/skills/including-generated-files/SKILL.md) — _skill_ — Files generated during the build are generally ignored by the build process. This leads to confusing results such as: - Generated files not being included in the output directory - Generated source files not being compiled - Globs not capturing files created during the build +- [MSBuild Anti-Pattern Catalog](.agents/skills/msbuild-antipatterns/SKILL.md) — _skill_ — A numbered catalog of common MSBuild anti-patterns. Each entry follows the format: +- [MSBuild Modernization: Legacy to SDK-style Migration](.agents/skills/msbuild-modernization/SKILL.md) — _skill_ — **Legacy indicators:** +- [MSBuild Server for CLI Caching](.agents/skills/msbuild-server/SKILL.md) — _skill_ — Use the MSBuild Server to cache evaluation results across CLI builds, matching the performance advantage Visual Studio gets from its long-lived MSBuild process. +- [Misleading ResolveProjectReferences Time](.agents/skills/resolve-project-references/SKILL.md) — _skill_ — Prevent misguided optimization of `ResolveProjectReferences` by explaining that its reported time is wall-clock wait time, not CPU work. +- [Organizing Build Infrastructure with Directory.Build Files](.agents/skills/directory-build-organization/SKILL.md) — _skill_ — Understanding which file to use is critical. They differ in **when** they are imported during evaluation: +- [SKILL](.agents/skills/build-parallelism/SKILL.md) — _skill_ — - `/maxcpucount` (or `-m`): number of worker nodes (processes) - Default: 1 node (sequential!). Always use `-m` for parallel builds - Recommended: `-m` without a number = use all logical processors - Each node builds one project at a time - Projects are scheduled based on dependency graph +- [SKILL](.agents/skills/build-perf-diagnostics/SKILL.md) — _skill_ — 1. **Generate a binlog**: `dotnet build /bl:{} -m` 2. **Replay to diagnostic log with performance summary**: ```bash dotnet msbuild build.binlog -noconlog -fl -flp:v=diag;logfile=full.log;performancesummary ``` 3. **Read the performance summary** (at the end of `full.log`): ```bash grep "Target Performance Summary\|Task Performance Summary" -A 50 full.log ``` 4. **Find expensive targets and tasks**: The PerformanceSummary section lists all targets/tasks sorted by cumulative time 5. **Check for node utilization**: grep for scheduling and node messages ```bash grep -i "node.*assigned\|building with\|scheduler" full.log | head -30 ``` 6. **Check analyzers**: grep for analyzer timing ```bash grep -i "analyzer.*elapsed\|Total analyzer execution time\|CompilerAnalyzerDriver" full.log ``` +- [SKILL](.agents/skills/eval-performance/SKILL.md) — _skill_ — For a comprehensive overview of MSBuild's evaluation and execution model, see [Build process overview](https://learn.microsoft.com/en-us/visualstudio/msbuild/build-process-overview). +- [SKILL](.agents/skills/incremental-build/SKILL.md) — _skill_ — MSBuild's incremental build mechanism allows targets to be skipped when their outputs are already up to date, dramatically reducing build times on subsequent runs. +- [Build Performance Agent](.github/agents/build-perf.agent.md) — _agent_ — You are a specialized agent for diagnosing and optimizing MSBuild build performance. You actively run builds, analyze binlogs, and provide data-driven optimization recommendations. +- [MSBuild Code Review Agent](.github/agents/msbuild-code-review.agent.md) — _agent_ — You are a specialized agent that reviews MSBuild project files for quality, correctness, and adherence to modern best practices. You actively scan files and produce actionable recommendations. +- [MSBuild Expert Agent](.github/agents/msbuild.agent.md) — _agent_ — You are an expert in MSBuild, the Microsoft Build Engine used by .NET and Visual Studio. You help developers run builds, diagnose build failures, optimize build performance, and resolve common MSBuild issues. + +### dotnet-test + +- [.NET Test Framework Reference](.agents/skills/dotnet-test-frameworks/SKILL.md) — _skill_ — Language-specific detection patterns for .NET test frameworks (MSTest, xUnit, NUnit, TUnit). +- [CRAP Score Analysis](.agents/skills/crap-score/SKILL.md) — _skill_ — Calculate CRAP (Change Risk Anti-Patterns) scores for .NET methods to identify code that is both complex and undertested. +- [Code Testing Generation Skill](.agents/skills/code-testing-agent/SKILL.md) — _skill_ — An AI-powered skill that generates comprehensive, workable unit tests for any programming language using a coordinated multi-agent pipeline. +- [Coverage Analysis](.agents/skills/coverage-analysis/SKILL.md) — _skill_ — Raw coverage percentages answer "what code was executed?" — they don't answer what you actually need to know: +- [Detect Static Dependencies](.agents/skills/detect-static-dependencies/SKILL.md) — _skill_ — Scan a C# codebase for calls to hard-to-test static APIs and produce a ranked report showing which statics appear most frequently, which files are most affected, and which abstractions already exist in the .NET ecosystem to replace them. +- [Generate Testability Wrappers](.agents/skills/generate-testability-wrappers/SKILL.md) — _skill_ — Generate wrapper interfaces, default implementations, and DI service registration code for untestable static dependencies. For statics that already have .NET built-in abstractions (`TimeProvider`, `IHttpClientFactory`), guide adoption of the built-in. For statics without built-in alternatives, generate custom minimal wrappers. +- [MSTest v1/v2 -> v3 Migration](.agents/skills/migrate-mstest-v1v2-to-v3/SKILL.md) — _skill_ — Migrate a test project from MSTest v1 (assembly references) or MSTest v2 (NuGet 1.x-2.x) to MSTest v3. MSTest v3 is **not binary compatible** with v1/v2 -- libraries compiled against v1/v2 must be recompiled. +- [MSTest v3 -> v4 Migration](.agents/skills/migrate-mstest-v3-to-v4/SKILL.md) — _skill_ — Migrate a test project from MSTest v3 to MSTest v4. The outcome is a project using MSTest v4 that builds cleanly, passes tests, and accounts for every source-incompatible and behavioral change. MSTest v4 is **not binary compatible** with MSTest v3 -- any library compiled against v3 must be recompiled against v4. +- [MTP Hot Reload for Iterative Test Fixing](.agents/skills/mtp-hot-reload/SKILL.md) — _skill_ — Set up and use Microsoft Testing Platform hot reload to rapidly iterate fixes on failing tests without rebuilding between each change. +- [Migrate Static to Wrapper](.agents/skills/migrate-static-to-wrapper/SKILL.md) — _skill_ — Perform mechanical, codemod-style replacement of static dependency call sites with calls to injected wrapper interfaces or built-in abstractions. Operates on a bounded scope (single file, project, or namespace) so migrations can be done incrementally. +- [Run .NET Tests](.agents/skills/run-tests/SKILL.md) — _skill_ — Detect the test platform and framework, run tests, and apply filters using `dotnet test`. +- [Test Anti-Pattern Detection](.agents/skills/test-anti-patterns/SKILL.md) — _skill_ — Quick, pragmatic analysis of .NET test code for anti-patterns and quality issues that undermine test reliability, maintainability, and diagnostic value. +- [Test Filter Syntax Reference](.agents/skills/filter-syntax/SKILL.md) — _skill_ — Filter syntax depends on the **platform** and **test framework**. +- [Test Platform and Framework Detection](.agents/skills/platform-detection/SKILL.md) — _skill_ — Determine **which test platform** (VSTest or Microsoft.Testing.Platform) and **which test framework** (MSTest, xUnit, NUnit, TUnit) a project uses. +- [VSTest -> Microsoft.Testing.Platform Migration](.agents/skills/migrate-vstest-to-mtp/SKILL.md) — _skill_ — Migrate a .NET test solution from VSTest to Microsoft.Testing.Platform (MTP). The outcome is a solution where all test projects run on MTP, `dotnet test` works correctly, and CI/CD pipelines are updated. +- [Writing MSTest Tests](.agents/skills/writing-mstest-tests/SKILL.md) — _skill_ — Help users write effective, modern unit tests with MSTest 3.x/4.x using current APIs and best practices. +- [xunit.v3 Migration](.agents/skills/migrate-xunit-to-xunit-v3/SKILL.md) — _skill_ — Migrate .NET test projects from xUnit.net v2 to xUnit.net v3. The outcome is a solution where all test projects reference `xunit.v3.*` packages, compiles cleanly, and all tests pass with the same results as before migration. +- [Builder Agent](.github/agents/code-testing-builder.agent.md) — _agent_ — You build/compile projects and report the results. You are polyglot — you work with any programming language. +- [Fixer Agent](.github/agents/code-testing-fixer.agent.md) — _agent_ — You fix compilation errors in code files. You are polyglot — you work with any programming language. +- [Linter Agent](.github/agents/code-testing-linter.agent.md) — _agent_ — You format code and fix style issues. You are polyglot — you work with any programming language. +- [Test Generator Agent](.github/agents/code-testing-generator.agent.md) — _agent_ — You coordinate test generation using the Research-Plan-Implement (RPI) pipeline. You are polyglot — you work with any programming language. +- [Test Implementer](.github/agents/code-testing-implementer.agent.md) — _agent_ — You implement a single phase from the test plan. You are polyglot — you work with any programming language. +- [Test Migration Agent](.github/agents/test-migration.agent.md) — _agent_ — You are a .NET test migration agent. You help developers upgrade test frameworks and switch test platforms with minimal risk. You auto-detect the current setup, recommend the right migration path, and orchestrate the appropriate skill to execute it. +- [Test Planner](.github/agents/code-testing-planner.agent.md) — _agent_ — You create detailed test implementation plans based on research findings. You are polyglot — you work with any programming language. +- [Test Quality Auditor Agent](.github/agents/test-quality-auditor.agent.md) — _agent_ — You are a .NET test quality auditor. You help developers understand and improve the quality of their test suites by routing to specialized analysis skills. Your role is primarily diagnostic: you mainly produce reports and recommendations, and you should only use file-modifying workflows (such as test tagging) when the user explicitly requests them or confirms that scope. +- [Test Researcher](.github/agents/code-testing-researcher.agent.md) — _agent_ — You research codebases to understand what needs testing and how to test it. You are polyglot — you work with any programming language. +- [Testability Migration Agent](.github/agents/testability-migration.agent.md) — _agent_ — You are a testability migration agent for .NET codebases. Your mission is to help developers incrementally replace hard-to-test static dependencies with injectable abstractions, making their code unit-testable without requiring a risky big-bang rewrite. +- [Tester Agent](.github/agents/code-testing-tester.agent.md) — _agent_ — You run tests and report the results. You are polyglot — you work with any programming language. + +