react-testing

To test React components, you use Vitest as the test runner and React Testing Library to render components and query output via accessibility roles, ensuring tests focus on user-centric behavior rather than internal implementation details.

Mocking API requests for React testing is best handled by Mock Service Worker (MSW), which intercepts network requests at the service worker level to provide predictable, isolated frontend testing without relying on actual backend availability.

Yes, you can test custom React hooks using Vitest by leveraging React Testing Library's renderHook utility, which allows you to render and interact with hooks outside of a traditional component wrapper for direct state and effect verification.

React Testing Library natively supports user-centric accessibility queries, allowing you to select elements by roles, labels, and text content to ensure your React components remain accessible and behave correctly from an end-user perspective.

Verifying asynchronous operations in React component tests involves using Vitest with React Testing Library's findBy queries and waitFor utilities to pause test execution until dynamic UI updates and API-driven state changes fully settle.

You should use MSW in frontend integration tests when you need to mock complex network interactions, ensuring reliable and maintainable tests for API integrations by simulating varied server responses without modifying application code.