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testing (12)

Cypress — CLI and configuration

Day-to-day Cypress CLI commands and config patterns — interactive runs, headless CI, intercepts, sessions, component testing, and Playwright comparison.
cypress cli testing e2e

Jest — CLI and configuration

Day-to-day Jest CLI commands and config patterns — running tests, mocks, snapshots, coverage, watch mode, and migration tips.
jest cli testing tooling

cypress — Front-end E2E testing with a live browser UI

Package-level reference for cypress on npm — install size, binary caching, peer-dep landscape, playwright competition, and component-testing add-ons.
npm package testing e2e browser

jest — Delightful JavaScript testing framework

Package-level reference for jest on npm — install variants, transformer ecosystem, peer-dep landscape, vitest competition, and migration paths.
npm package testing tdd jest

@playwright/test — End-to-end browser testing

Package-level reference for @playwright/test and playwright on npm — install variants, browser-binary download, fixtures, traces, and alternatives.
npm package testing e2e browser

vitest — Vite-native test runner

Package-level reference for vitest on npm — install variants, vite peer-dep, UI and coverage add-ons, environments, and alternatives.
npm package testing tdd esm

pytest — The De-Facto Python Test Framework

Package-level reference for pytest on PyPI — install variants, version policy, the pytest-* plugin ecosystem, and alternatives.
pip package testing tdd

ragas — RAG Evaluation Framework

Package-level reference for ragas on PyPI — install variants, LLM-as-judge dependencies, metric churn, and alternative evaluators.
pip package ai rag evaluation

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

mypy — Static Type Checker

Catch type errors before runtime with mypy. Covers strict mode, common error codes, type: ignore annotations, gradual typing, and pyproject.toml configuration.
python mypy typing types static-analysis type-hints

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