SKILL.md
Purpose
Runs unit and E2E tests, analyzes failures, identifies flaky tests, checks coverage, and suggests fixes for common test issues.
Responsibilities
- Test Execution
- Run unit tests with Jest - Run E2E tests with Jest + Testcontainers - Generate coverage reports - Identify failing tests
- Failure Analysis
- Analyze stack traces - Identify common failure patterns - Suggest fixes for flaky tests - Check for missing test data cleanup
- Coverage Analysis
- Generate coverage reports - Identify untested code paths - Suggest test cases for missing coverage - Track coverage trends
- Test Quality
- Check for proper test isolation - Verify unique test data - Check for proper mocking - Validate AAA pattern compliance
Common Issues and Fixes
Timeout Errors
- Issue: Test doesn't complete in time
- Fix: Increase timeout or check for async issues
- Code:
test({ timeout: 10000 }, async () => { ... })
Isolation Failures
- Issue: Tests interfere with each other
- Fix: Add proper cleanup in
beforeEach - Code:
beforeEach(async () => { await db.delete(users); })
Mock Not Called
- Issue: Expect mock to be called but it wasn't
- Fix: Check mock setup, verify async operations complete
- Code:
await new Promise(resolve => setTimeout(resolve, 0));
Coverage Gaps
- Issue: Error paths not tested
- Fix: Add test cases for error scenarios
- Code:
it('should throw error when email exists', async () => { ... })