Implement comprehensive frontend testing using Jest, Vitest, React Testing Library, and Cypress. Use when building robust test suites for UI and integration tests.

Frontend Testing Table of Contents [Overview]( overview) [When to Use]( when to use) [Quick Start]( quick start) [Reference Guides]( reference guides) [Best Practices]( best practices) Overview Build comprehensive test suites for frontend applications including unit tests, integration tests, and end to end tests with proper coverage and assertions. When to Use Component testing Integration testing End to end testing Regression prevention Quality assurance Test driven development Quick Start Minimal working example: Reference Guides Detailed implementations in the references/ directory: Guide Contents [Jest Unit Testing (React)](references/jest unit testing react.md) Jest Unit Testing (React) [React Testing Library Integration Tests](references/react testing library integration tests.md) React Testing Library Integration Tests [Vitest for Vue Testing](references/vitest for vue testing.md) Vitest for Vue Testing [Cypress E2E Testing](references/cypress e2e testing.md) Cypress E2E Testing [Test Coverage Configuration](references/test coverage configuration.md) Test Coverage Configuration Best Practices ✅ DO Follow established patterns and conventions Write clean, maintainable code Add appropriate documentation Test thoroughly before deploying ❌ DON'T Skip testing or validation Ignore error handling Hard code configuration values

frontend-testing