Added core indexes property tests for sparse

[vic-tsang]

This PR contains:

• core indexes property tests for sparse

Ref:

• Issue Add compatibility test for core: indexes (14 total) #27

[documentdb-triage-tool]

🤖 Auto-triaged by documentdb-triage-tool.

Applied: compatibility test, enhancement
Project fields suggested: Component test-coverage · Priority P2 · Effort L · Status Needs Review
Confidence: 0.82 (mixed)

Reasoning

component from path globs (test-coverage); effort from diff stats (991+0 LOC, 8 files); LLM: Adds new property-based test coverage for sparse indexes, expanding the compatibility test suite as part of a tracked issue.

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[vic-tsang]

fixed conflict and rebase

[eerxuan]

🟠 [Required] test_sparse_text_skips_missing_text and test_sparse_exists_false_not_affected both belong outside properties/sparse/

def test_sparse_text_skips_missing_text(collection):
"""Test text index is always sparse — skips docs without text field."""
...indexes=[{"key": {"content": "text"}, "name": "idx_text"}],

This test creates a text index without sparse: True and asserts text-index-implicit-sparse behavior. The "text index is always sparse" property belongs in a text-index test folder (or
properties/sparse/test_implicit_sparse.py), not in this folder which is about explicit sparse option.

Same for test_sparse_exists_false_not_affected — the property tested is "$exists:false works correctly" which is a $exists query operator concern, not sparse-specific.

These two would live better in:

• text_search/ for the text-implicit-sparse test
• query/misc/exists/ for the $exists:false test