component-testing

React Testing Library enables unit testing of React components by simulating user interactions and validating component states. Write tests that query elements as users would see them, then assert on rendered output to verify frontend correctness across your component suite.

Yes. Playwright automates E2E testing for React pages and user flows by controlling a real browser, navigating interactions, and validating page state. Run tests with npx playwright test to cover full application workflows beyond unit test scope.

Accessibility testing validates that React components meet inclusivity standards. Use React Testing Library with accessibility queries and assertions to detect missing labels, improper ARIA attributes, and keyboard navigation issues before deployment.

Mock API calls in unit tests using React Testing Library to isolate component logic from backend dependencies. Verify that components handle API responses, errors, and loading states correctly without hitting real endpoints during test runs.

Visual regression testing captures component screenshots and compares them across versions to detect unintended UI changes. Combine with RTL unit tests and Playwright E2E tests to build comprehensive QA coverage across functional, accessibility, and visual layers.

They serve different scopes: React Testing Library handles unit and integration tests of isolated components; Playwright handles E2E tests of complete user flows. Using both covers unit, integration, E2E, and accessibility requirements across your QA workflow.