Summary
A strong foundation for testing React components the modern way: React Testing Library, Vitest or Jest, MSW for HTTP mocking, and axe for accessibility checks. The guide is opinionated in the right ways, prioritizing user-facing behavior over implementation details, accessible queries over test IDs, and userEvent over fireEvent. The MSW setup with onUnhandledRequest error is excellent for catching silent test passes. The custom hook testing section correctly warns about QueryClient instantiation gotchas. Light on the boundary between component tests and full E2E, but the query priority table and provider wrapping pattern alone will save you from common mistakes if you're migrating from Enzyme or setting up tests from scratch.
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npx -y skills add affaan-m/ecc --skill react-testing --agent claude-codeInstalls into .claude/skills of the current project.
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Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Give your AI agent a complete email layer—sending, inbound inboxes, and sandbox testing.
Get 4K emails/month free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →
