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test: add empty string and unicode edge cases to ValueTest #8219

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568f3e7
test: add empty string and unicode edge cases to ValueTest
Tusharika725 Mar 27, 2026
7b02592
test: upgrade string boundary checks to property-based fuzz tests
Tusharika725 Mar 28, 2026
8fcff5e
style: fix import lexicographical order via spotlessApply
Tusharika725 Mar 28, 2026
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40 changes: 40 additions & 0 deletions api/all/src/test/java/io/opentelemetry/api/logs/ValueTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,10 @@
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.jupiter.params.provider.Arguments.arguments;

import edu.berkeley.cs.jqf.fuzz.Fuzz;
import edu.berkeley.cs.jqf.fuzz.JQF;
import edu.berkeley.cs.jqf.fuzz.junit.GuidedFuzzing;
import edu.berkeley.cs.jqf.fuzz.random.NoGuidance;
import io.opentelemetry.api.common.KeyValue;
import io.opentelemetry.api.common.Value;
import io.opentelemetry.api.common.ValueType;
Expand All @@ -25,6 +29,8 @@
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import org.junit.runner.Result;
import org.junit.runner.RunWith;

class ValueTest {

Expand Down Expand Up @@ -211,5 +217,39 @@ void valueByteAsString() {
String base64Encoded = Value.of(str.getBytes(StandardCharsets.UTF_8)).asString();
byte[] decodedBytes = Base64.getDecoder().decode(base64Encoded);
assertThat(new String(decodedBytes, StandardCharsets.UTF_8)).isEqualTo(str);

// Test empty string
String emptyStr = "";
String emptyBase64 = Value.of(emptyStr.getBytes(StandardCharsets.UTF_8)).asString();
byte[] decodedEmpty = Base64.getDecoder().decode(emptyBase64);
assertThat(new String(decodedEmpty, StandardCharsets.UTF_8)).isEqualTo(emptyStr);

// Test string with special characters
String specialStr = "hello \n \t 🌍 world!";
String specialBase64 = Value.of(specialStr.getBytes(StandardCharsets.UTF_8)).asString();
byte[] decodedSpecial = Base64.getDecoder().decode(specialBase64);
assertThat(new String(decodedSpecial, StandardCharsets.UTF_8)).isEqualTo(specialStr);
}

@RunWith(JQF.class)
public static class FuzzTestCases {
@Fuzz
public void valueByteAsStringFuzz(String randomString) {
String base64Encoded = Value.of(randomString.getBytes(StandardCharsets.UTF_8)).asString();
byte[] decodedBytes = Base64.getDecoder().decode(base64Encoded);
assertThat(new String(decodedBytes, StandardCharsets.UTF_8)).isEqualTo(randomString);
}
}

@SuppressWarnings("SystemOut")
@Test
void valueByteAsStringFuzzing() {
Result result =
GuidedFuzzing.run(
FuzzTestCases.class,
"valueByteAsStringFuzz",
new NoGuidance(10000, System.out),
System.out);
assertThat(result.wasSuccessful()).isTrue();
}
}
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