Comprehensive testing is essential for reliable applications. Learn different testing strategies and how to implement them effectively.
Unit Testing Fundamentals
Write isolated tests for individual functions and components. Use Jest or Vitest to create fast, reliable unit tests with good coverage.
Integration Testing
Test how components work together. Test API integration, database queries, and complex user flows that involve multiple components.
End-to-End (E2E) Testing
Use Playwright or Cypress to test complete user journeys. These tests run in real browsers and catch issues that unit tests miss.
Test Coverage and Metrics
Aim for meaningful coverage, not just high percentages. Focus on critical paths and edge cases rather than achieving 100% coverage.
CI/CD Integration
Integrate tests into your CI/CD pipeline. Run tests automatically on every commit to catch regressions early.
Conclusion
A good testing strategy prevents bugs and gives you confidence in your code. Start with unit tests and gradually add integration and E2E tests!