testing

A testing strategy spans unit, integration, and end-to-end levels organized by the test pyramid. Start by defining what each level covers—units for isolated components, integration for module interactions, and E2E for user workflows—then establish coverage thresholds and CI/CD automation to enforce them consistently.

Playwright enables cross-browser web app testing with framework-agnostic setup. It automates browser interactions for E2E scenarios and integrates into CI/CD pipelines, complementing unit and integration tests in a full testing pyramid.

TDD is a workflow where you write tests first, then code to pass them, then refactor—the Red-Green-Refactor cycle. This approach improves design and prevents regressions by making tests the specification before implementation begins.

Test coverage tools track which code lines execute under tests, producing metrics like line and branch coverage. Set thresholds aligned with your test pyramid distribution—higher coverage for unit tests, lower for E2E—and enforce them in CI/CD to maintain quality.

Pytest integrates into CI/CD workflows to automate test execution on every commit. Combined with coverage analysis and organized test patterns, it enforces consistent quality gates across development and deployment stages.

Organize tests by level—unit, integration, E2E—with clear naming conventions and directory structures mirroring your source code. Consistent patterns make tests maintainable, discoverable, and easier to debug within a larger test suite.