Testing Strategies
Comprehensive test design for deployment readiness.
Test Pyramid
/ E2E \ Few, slow, expensive
/ Integ \ Some, medium
/ Unit \ Many, fast, cheap
Coverage Guidelines
| Level | Coverage | Focus |
|---|---|---|
| Unit | 80%+ | Business logic |
| Integration | Key paths | APIs, DB |
| E2E | Critical flows | User journeys |
Unit Test Patterns
- Test one thing per test
- Clear arrange/act/assert
- Mock external dependencies
- Fast execution (<1s each)
Integration Test Patterns
- Test real dependencies
- Use test databases
- Clean up after tests
- Cover API contracts
E2E Test Patterns
- Critical user journeys only
- Stable selectors
- Retry flaky network calls
- Parallel where possible