test-engineer

A testing strategy spans unit, integration, and end-to-end levels. Start by analyzing your feature requirements, select appropriate frameworks for each level, then scaffold tests across the pyramid—unit tests for logic validation, integration tests for API routes, and E2E tests for user workflows. This approach ensures regression safety and measurable coverage.

Unit testing validates individual functions in isolation. Integration testing verifies components work together, such as API routes with databases. End-to-end testing simulates complete user workflows like login flows. Together they form a testing pyramid that catches bugs at different levels and reduces release risk.

Test data and mocks isolate components for reliable testing. Use factories to generate consistent test data, fixtures for reusable test state, and mocks to replace external dependencies. Configure these in your test framework setup, then reference them across unit and integration tests to maintain repeatability.

Yes. Configure your CI system to run unit, integration, and E2E tests on each pull request. Set coverage goals and fail builds that don't meet thresholds. This ensures tests execute consistently, catches regressions early, and enforces quality standards before code merges.

Yes. The testing pyramid applies to both frontend and backend. Frontend tests validate components and user interactions; backend tests verify APIs and business logic. The frameworks and tools differ, but the strategy of unit → integration → E2E testing remains consistent across both.

Test-driven development (TDD) writes tests before code; behavior-driven development (BDD) expresses tests in business language. Both start with test skeletons that define expected behavior, then implement code to pass them. This practice reduces bugs and keeps code aligned with requirements throughout development.