[daily-flaky-report] Daily Flaky Test Report - February 5, 2026

[github-actions[bot]]

📊 Test Stability Report - 2026-02-05

Summary Metrics

Metric	Value	Trend
📦 Workflow Runs Analyzed	3	-
✅ Total Test Executions	180 (60 per test × 3 tests)	-
🔴 Flaky Tests Detected	3	🆕 New
📈 Overall Flakiness Rate	40.6% (73 failures / 180 runs)	⚠️ HIGH
⏱️ Analysis Time Window	Last 24 hours	-

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🚨 Flaky Tests Detected

Critical Priority (>50% failure rate)

Test Name	Failure Rate	Failures	Status	Issue
testGenerateRandomPrimeCandidate	71.7%	43/60	🔴 CRITICAL	#aw_flaky001prime

High Priority (30-50% failure rate)

Test Name	Failure Rate	Failures	Status	Issue
testGenerateRandomEvenNumber	33.3%	20/60	⚠️ HIGH	#aw_flaky002even

Medium Priority (10-30% failure rate)

Test Name	Failure Rate	Failures	Status	Issue
testGenerateRandomOddNumber	16.7%	10/60	🟡 MEDIUM	#aw_flaky003odd

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🔍 Analysis Details

Test Suite: com.corntest.RandomMathOperationsTest

All three flaky tests are in the same test class, suggesting a systemic issue with random number generation logic.

Common Pattern

Each test uses @RepeatedTest(20) annotation to run 20 times per workflow execution. This is excellent for catching flaky behavior, but the underlying implementations have bugs.

Root Cause Summary

1. Prime Candidate Generator - Not validating primality at all (71.7% failure)
2. Even Number Generator - Not ensuring even numbers (33.3% failure)
3. Odd Number Generator - Not ensuring odd numbers (16.7% failure)

All three issues stem from missing validation logic in the random number generation methods.

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📋 Workflow Runs Analyzed

1. Run 21718843691

   • Branch: main
   • Timestamp: 2026-02-05 16:06:40 UTC
   • Result: ❌ Build Failure (test failures)
   • Failures: 24 test runs failed

2. Run 21715475154

   • Branch: copilot/debug-flaky-test-detection
   • Timestamp: 2026-02-05 16:06:37 UTC
   • Result: ❌ Build Failure (test failures)
   • Failures: 23 test runs failed

3. Run 21714780687

   • Branch: main
   • Timestamp: 2026-02-05 14:12:30 UTC
   • Result: ❌ Build Failure (test failures)
   • Failures: 26 test runs failed

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💡 Recommendations

Immediate Actions (Today)

1. 🔴 CRITICAL: Fix testGenerateRandomPrimeCandidate

   • Add proper primality checking in generateRandomPrimeCandidate() method
   • Estimated effort: 15-30 minutes
   • Impact: Will fix 71.7% of all flaky test failures

2. ⚠️ HIGH: Fix testGenerateRandomEvenNumber

   • Ensure even number generation using (n * 2) or bitwise operations
   • Estimated effort: 10 minutes
   • Impact: Will fix 33.3% of all flaky test failures

3. 🟡 MEDIUM: Fix testGenerateRandomOddNumber

   • Ensure odd number generation using (n * 2) + 1 or bitwise operations
   • Estimated effort: 10 minutes
   • Impact: Will fix 16.7% of all flaky test failures

Long-term Improvements

1. Add Unit Tests for Generators

   • Test each random number generator independently
   • Verify properties (even/odd/prime) are guaranteed

2. Consider Property-Based Testing

   • Use frameworks like jqwik or QuickCheck
   • Automatically verify mathematical properties

3. Add Static Analysis

   • Use SpotBugs or Error Prone to catch logic errors
   • Configure to fail build on certain bug patterns

4. Implement Test Retries with Caution

   • While fixing root causes, consider @ReliableTest annotations
   • Only as temporary measure while root causes are addressed

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📈 Historical Comparison

Note: This is the first daily report. Historical trends will be available starting tomorrow.

Baseline Established

• Flaky tests detected: 3
• Average failure rate: 40.6%
• All tests are newly reported

Future reports will track:

• ✅ Tests resolved
• 🔄 Persistent flaky tests
• 📈 Trend analysis (improving/degrading)

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🔗 Useful Links

• All Open Flaky Test Issues
• Test Results Workflow
• Project Test Reports

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🤖 Report Generation

This report was automatically generated by the Daily Flaky Test Detection workflow.

Methodology:

• Analyzed JUnit test execution logs from GitHub Actions
• Tracked test results across multiple repeated executions (@RepeatedTest)
• Calculated failure rates based on pass/fail patterns
• Created individual issues for each flaky test with detailed diagnostics

Next Report: Tomorrow at ~16:50 UTC

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For questions about this report or the flaky test detection system, see the workflow configuration

AI generated by Daily Flaky Test Repo Status 🔍

• expires on Feb 12, 2026, 4:57 PM UTC

[github-actions[bot]]

This discussion was automatically closed because it expired on 2026-02-12T16:57:07.981Z.