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#testing (4)

Cheat sheets (4)

Playwright — End-to-end browser testing across Chromium, Firefox, WebKit

Cross-browser end-to-end test runner from Microsoft with auto-waiting, role-based selectors, trace viewer, and codegen.
javascript playwright testing browser e2e

Testing Strategies — Pyramid, Fixtures, Mocks, Property-Based, and CI Patterns

A practical guide to test design — the pyramid (unit/integration/e2e), fixture and mock patterns, property-based testing, snapshot tests, and CI strategies that scale.
testing unit-tests integration-tests e2e fixtures mocks property-based ci tdd

Vitest

Vite-native unit test framework with a Jest-compatible API. Covers setup, writing tests, matchers, mocking, timers, async testing, coverage, and UI mode.
javascript vitest testing tooling

pytest — Testing Framework

Write and run Python tests with pytest. Covers test discovery, assertions, fixtures, parametrize, conftest, and common patterns.
python pytest testing fixtures parametrize tdd