Can it help with testing asynchronous functions?

Absolutely. The skill provides patterns for handling promises, async/await, and testing for specific error rejections.

Does it support snapshot testing?

Yes, it covers basic snapshots, inline snapshots, and property matchers for dynamic data like IDs and timestamps.

How does it handle external dependencies like API calls?

It utilizes advanced module mocking techniques for libraries like Axios, allowing you to simulate network responses and verify service behavior without making actual requests.

Does this skill support React Testing Library?

Yes, it includes specific patterns and best practices for testing React components using both Jest assertions and React Testing Library selectors.

Can I use this for testing time-sensitive logic?

Yes, the skill includes patterns for utilizing Jest's fake timers to test timeouts, intervals, and other time-dependent code.

Jest Testing Patterns

Name: Jest Testing Patterns
Author: TheBushidoCollective

byTheBushidoCollective

•

Security & Testing

Implements professional Jest testing patterns including unit tests, mocks, and snapshots for comprehensive JavaScript and React code coverage.

The Jest Testing Patterns skill empowers Claude to architect and write high-quality test suites using the Jest framework. It provides a standardized approach to organizing test suites, implementing robust assertions, and managing setup/teardown processes. Beyond basic unit testing, this skill covers advanced scenarios like mocking complex modules, spying on global functions, and performing snapshot testing for UI components. It ensures that code generated or refactored remains maintainable, reliable, and follows industry-standard testing methodologies for both backend and frontend environments.

Key Features

0195 GitHub stars

02Behavioral verification through method and global function spies

03Comprehensive test suite organization using describe and it blocks

04Asynchronous test patterns for promises and async/await operations

05Advanced mocking of functions, modules, and partial implementations

06Snapshot testing for UI components and complex data structures

Use Cases

01Mocking external API dependencies and third-party modules in integration tests

02Testing React components and user interactions using React Testing Library

03Writing unit tests for complex business logic and utility functions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add thebushidocollective/han jest-testing-patterns

For use in Claude.ai and ChatGPT

Download Skill