Interview Questions
Jest and React Testing Library are recommended for unit and integration testing. Cypress or Playwright for end-to-end testing. Vitest gaining popularity for faster test execution. Built-in Next.js testing support.
Use React Testing Library to render pages. Test page components. Handle data fetching. Support routing tests. Test page lifecycle.
Configure coverage reporting. Handle coverage goals. Support coverage analysis. Implement coverage tracking. Handle code coverage.
Implement security tests. Handle vulnerability testing. Support penetration testing. Implement security scenarios. Handle security validation.
Use Node.js debugger. Handle server breakpoints. Inspect server state. Support server-side debugging. Implement logging.
Test individual components/functions. Handle isolated testing. Support test coverage. Implement unit test cases. Handle component logic.
Mock fetch requests. Handle async testing. Support data mocking. Implement fetch testing. Handle response simulation.
Test component interactions. Handle feature testing. Support workflow testing. Implement integration scenarios. Handle component communication.
Handle route debugging. Support navigation testing. Implement route testing. Handle path resolution. Debug routing logic.
Test error scenarios. Handle error boundaries. Support error testing. Implement error cases. Handle error recovery.
Test state changes. Handle state updates. Support state testing. Implement state scenarios. Handle state logic.
Use visual regression testing. Handle UI testing. Support screenshot testing. Implement visual validation. Handle visual comparison.
Configure jest.config.js for Next.js. Set up environment and transforms. Handle module mocking. Support TypeScript testing. Default configuration available with next/jest.
Mock HTTP requests. Test API endpoints. Handle response validation. Support API testing. Implement test scenarios.
Create test fixtures. Handle mock data. Support test databases. Implement data generation. Handle test state.
Create complex test scenarios. Handle advanced cases. Support pattern testing. Implement testing strategies. Handle edge cases.
Test performance metrics. Handle load testing. Support stress testing. Implement performance scenarios. Handle optimization testing.
Create test documentation. Handle documentation updates. Support example tests. Implement documentation strategies. Handle maintenance.
Configure test environments. Handle environment setup. Support environment isolation. Implement environment management. Handle configurations.
Use Chrome DevTools or VS Code debugger. Set breakpoints. Inspect component state. Handle error tracing. Support source maps.
Captures component output. Compares against stored snapshots. Detects UI changes. Support snapshot updates. Handle snapshot maintenance.
Use React DevTools Profiler. Handle performance monitoring. Support optimization. Implement performance debugging. Handle bottlenecks.
Mock authentication state. Handle protected routes. Support auth testing. Implement auth scenarios. Handle user sessions.
Create middleware tests. Handle request processing. Support middleware testing. Implement test scenarios. Handle middleware chain.
Use Cypress or Playwright. Handle user flows. Support browser testing. Implement test scenarios. Handle end-to-end workflows.
Implement CI/CD testing. Handle automated tests. Support test pipelines. Implement automation strategies. Handle continuous testing.
Track test execution. Handle test analytics. Support monitoring tools. Implement monitoring strategies. Handle test metrics.
Set up continuous testing. Handle automated runs. Support test pipelines. Implement continuous strategies. Handle test automation.
Maintain test suites. Handle test updates. Support test refactoring. Implement maintenance strategies. Handle test debt.