Does this skill support both Jest and Vitest?

Yes, it provides optimized configurations and specific implementation patterns for both the industry-standard Jest framework and the modern, Vite-native Vitest framework.

Can it help with mocking external APIs?

Absolutely. The skill includes dedicated patterns for global fetch mocking, module-level mocking, and using dependency injection to isolate code from external services during testing.

Is it suitable for frontend framework testing?

Yes, the patterns provided are compatible with React, Vue, and Svelte, especially when used in conjunction with Testing Library for component-level testing.

Does this skill cover code coverage settings?

Yes, it includes templates for setting up coverage thresholds and reporting in various formats like HTML and JSON to ensure high-quality standards in CI/CD pipelines.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: lifangda

bylifangda

•

Security & Testing

Implements robust testing architectures using Jest and Vitest to ensure code quality across JavaScript and TypeScript projects.

This skill provides a comprehensive library of modern testing patterns and configurations for JavaScript and TypeScript development. It enables Claude to assist with setting up test infrastructures from scratch, writing unit tests for complex logic, mocking external dependencies, and implementing test-driven development (TDD) workflows. By utilizing established patterns for Jest and Vitest, it helps developers maintain high code coverage and build resilient applications through structured unit, integration, and end-to-end testing strategies.

Key Features

01Guidance for setting up coverage thresholds and CI/CD integration

02Optimized configurations for Jest and Vitest testing frameworks

03Reusable patterns for testing pure functions, classes, and asynchronous code

04Advanced mocking strategies for modules and external API dependencies

05Dependency injection patterns to facilitate isolated unit testing

0616 GitHub stars

Use Cases

01Mocking complex third-party integrations like mail services or payment gateways

02Setting up a new TypeScript project with a pre-configured Vitest environment

03Refactoring legacy codebases by adding comprehensive unit tests for business logic

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add lifangda/claude-plugins javascript-testing-patterns

For use in Claude.ai and ChatGPT

Download Skill