Which testing frameworks does this skill support?

This skill provides comprehensive configurations and implementation patterns specifically for Jest and Vitest, the two most popular testing frameworks for JavaScript and TypeScript.

Does this skill help with mocking external API calls?

Yes, it includes specific patterns for mocking global fetch, module-level mocking with Vitest, and using dependency injection to isolate services from external network calls.

Can I use this for both Node.js and frontend projects?

Absolutely. It contains configurations for Node.js environments as well as patterns compatible with Testing Library for React, Vue, and other frontend frameworks.

How does this skill assist with TDD?

It provides ready-to-use templates for common testing scenarios, allowing you to quickly write failing tests for functions and classes before implementing the logic.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: wshobson

bywshobson

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23,194

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Security & Testing

Implements comprehensive testing strategies for JavaScript and TypeScript applications using modern frameworks like Jest and Vitest.

This skill provides a structured framework for establishing robust testing environments in JavaScript and TypeScript projects. It guides developers through the entire testing lifecycle, from initial infrastructure setup to implementing complex mocking patterns for isolated unit tests. By leveraging industry-standard tools like Jest and Vitest, it facilitates the creation of maintainable test suites for pure functions, classes, and asynchronous services, ensuring high code quality and reliable deployments through test-driven development (TDD) and comprehensive coverage reporting.

Key Features

0123,194 GitHub stars

02Advanced mocking patterns for modules and external dependencies

03Unit testing patterns for pure functions and TypeScript classes

04Dependency injection strategies for architectural testability

05Pre-configured Jest and Vitest setup templates

06Asynchronous testing patterns for fetch requests and promises

Use Cases

01Implementing complex integration tests for API-driven services

02Refactoring legacy codebases by adding robust unit test coverage and mocking

03Establishing a test-driven development workflow for new TypeScript projects

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add wshobson/agents javascript-testing-patterns

For use in Claude.ai and ChatGPT

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