react-testing skillA
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react-testing is agent-read markdown (skill) from kunanonj/ai-skills-hub: React component testing with React Testing Library, Vitest/Jest, MSW for network mocking, accessibility assertions with axe, and the decision boundary between component tests and Playwright/Cypress end-to-end runs. Use when writing or fixing tests for React components, hooks, or pages..
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What the file says
# React Testing Comprehensive React testing patterns for behavior-focused component tests, custom hook tests, accessibility assertions, and network-level mocking. ## When to Activate - Writing tests for React components, custom hooks, or pages - Adding test coverage to legacy untested components - Migrating from Enzyme or class-component-era patterns to React Testing Library - Setting up Vitest or Jest for a new React project - Mocking HTTP requests in tests - Asserting accessibility violations - Deciding which tests belong in RTL vs Playwright Component Testing vs full E2E ## Core Principle Test what the user sees and does, not implementation details. A test should: - Render the component with the same providers it has in production - Interact with it via accessible queries (role, label) and `userEvent` - Assert visible output and observable side effects (callback fired, request sent) A test should NOT: - Inspect component state, props passed to children, or which hooks were called - Mock React itself or framework hooks - Assert on the number of renders or DOM structure beyond what affects users ## Library Choice | Runner | When | Note | |---|---|---| …
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Source
kunanonj/ai-skills-hub · 5 stars · license MIT · pushed 2026-09-14 · branch main
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