testing-strategylisted

# Testing Strategy Skill ## Purpose Comprehensive testing guidelines including test pyramid, coverage targets, and test patterns. ## Auto-Invoke Triggers - Planning test strategy - Writing unit/integration tests - Reviewing test coverage - Setting up test infrastructure --- ## Test Pyramid ``` /\ / \ E2E Tests (10%) /----\ - Critical user flows / \ - Slow, expensive /--------\ Integration Tests (20%) / \ - API tests, DB tests /------------\ - Medium speed / \ Unit Tests (70%) /----------------\ - Fast, isolated - Business logic ``` ### Distribution Guidelines | Type | Percentage | Focus | |------|------------|-------| | Unit | 70% | Business logic, utilities | | Integration | 20% | API, database, services | | E2E | 10% | Critical user journeys | --- ## Coverage Targets | Metric | Minimum | Target | |--------|---------|--------| | Line coverage | 70% | 80% | | Branch coverage | 60% | 70% | | Critical paths | 90% | 100% | ### What to Cover - All public methods - Business logic - Edge cases - Error handling - Integration points ### What NOT to Cover - Generated code - Simple getters/setters - Framework code - Third-party libraries --- ## Unit Testing ### Principles - Test one thing per test - Tests should be fast (< 100ms) - Tests should be isolated - Tests should be deterministic - No external dependencies ### AAA Pattern ``` Arrange - Set up test data and mocks Act