Does this skill support Vitest?

Yes, due to API compatibility, this skill provides expert guidance for both Jest and Vitest frameworks.

How does it handle API calls in tests?

The skill recommends and assists with MSW (Mock Service Worker) integration for reliable network mocking rather than mocking global fetch.

Does it provide test templates?

Yes, it includes built-in templates for unit tests, async patterns, and React hook testing to accelerate your development workflow.

Can it help with React component testing?

Absolutely, it includes deep knowledge of React Testing Library, including accessible queries and user-event simulations.

Jest Testing Expert

Name: Jest Testing Expert
Author: C0ntr0lledCha0s

byC0ntr0lledCha0s

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Security & Testing

Streamlines Jest and Vitest testing for JavaScript, TypeScript, and React applications with expert configuration and mocking strategies.

About

The Jest Testing Expert skill empowers Claude with deep domain knowledge of the Jest framework and its ecosystem, including Vitest and React Testing Library. It automates the setup of complex testing environments, provides best-practice patterns for mocking modules and network requests via MSW, and assists in writing robust unit and integration tests. Whether you are troubleshooting failing snapshots or optimizing code coverage, this skill ensures your test suite remains maintainable and reliable across Node.js and frontend projects.

Key Features

Automated Jest and Vitest configuration and environment setup
React Testing Library integration with accessible query patterns
Network mocking using Mock Service Worker (MSW) integration
1 GitHub stars
Advanced mocking strategies for functions, modules, and timers
Custom matcher implementation and asymmetric assertion logic

Use Cases

Setting up a comprehensive test suite for a new React or Node.js project
Migrating existing tests from Jest to Vitest or implementing MSW for API mocking
Debugging complex asynchronous tests and race conditions in test suites

About

Key Features

Automated Jest and Vitest configuration and environment setup
React Testing Library integration with accessible query patterns
Network mocking using Mock Service Worker (MSW) integration
1 GitHub stars
Advanced mocking strategies for functions, modules, and timers
Custom matcher implementation and asymmetric assertion logic

Use Cases

Setting up a comprehensive test suite for a new React or Node.js project
Migrating existing tests from Jest to Vitest or implementing MSW for API mocking
Debugging complex asynchronous tests and race conditions in test suites