Testing Strategies for Web Apps

Effective testing strategies catch bugs early, enable confident refactoring, and serve as living documentation. The key is finding the right balance of test types and coverage.

The Testing Pyramid

Unit tests form the foundation, integration tests verify components work together, and end-to-end tests confirm critical user flows. This pyramid shape reflects both the number and speed of tests—many fast unit tests, fewer slower integration tests, and even fewer comprehensive E2E tests.

Test-Driven Development

TDD can seem slower initially, but leads to better design and fewer bugs. Writing tests first forces you to think about interfaces and edge cases upfront, resulting in more maintainable code.

Testing User Interfaces

Modern testing libraries like Testing Library encourage testing from the user's perspective. Focus on testing behavior rather than implementation details, making tests more resilient to refactoring.