Summary
This is a solid reference for anyone writing tests with Jest and React Testing Library. It walks through Jest config for both JavaScript and TypeScript projects, covers the query priority system (getByRole first, getByTestId as last resort), and includes practical patterns for mocking, async testing, and custom hooks. The setup file examples are especially useful since they handle common gotchas like mocking matchMedia and IntersectionObserver. You'll want this when you're setting up a new React project's test infrastructure or when your team needs alignment on testing philosophy. It follows the "test behavior, not implementation" approach throughout, which saves you from brittle tests that break on refactors.
Install to Claude Code
npx -y skills add manutej/luxor-claude-marketplace --skill jest-react-testing --agent claude-codeInstalls into .claude/skills of the current project.
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belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
