Which testing frameworks does this skill support?

This skill provides optimized patterns and configurations specifically for Jest, Vitest, and Testing Library.

Can I use this for both frontend and backend testing?

Yes, it includes patterns for testing Node.js backend services as well as frontend components and user flows.

Is this skill compatible with TypeScript?

Absolutely, it is specifically designed with first-class support for both JavaScript and TypeScript environments.

How does this help with code coverage?

It includes pre-configured settings for tracking and enforcing branch, function, and line coverage thresholds to ensure code quality.

Does it include support for mocking external APIs?

Yes, it provides several patterns for mocking modules, global fetch, and using dependency injection for testability.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: EngineerWithAI

byEngineerWithAI

0•

Security & Testing

Implements comprehensive testing strategies for JavaScript and TypeScript applications using industry-standard frameworks like Jest and Vitest.

This skill provides a robust framework for implementing unit, integration, and end-to-end testing across JavaScript and TypeScript projects. It offers standardized patterns for mocking external dependencies, testing asynchronous code, and setting up complex test infrastructures. By following best practices for Test-Driven Development (TDD) and Behavior-Driven Development (BDD), it ensures high code coverage and reliability while streamlining the creation of maintainable test suites for both frontend components and backend services.

Key Features

01Unit testing patterns for pure functions and classes

020 GitHub stars

03Advanced mocking for APIs and external modules

04Standardized Jest and Vitest configurations

05Asynchronous testing with dependency injection patterns

06Comprehensive coverage reporting and threshold setup

Use Cases

01Implementing advanced mocking for complex external API dependencies

02Building a robust test suite for a new TypeScript project

03Migrating existing projects from Jest to Vitest for faster execution

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add engineerwithai/engineerwith-agents javascript-testing-patterns

For use in Claude.ai and ChatGPT

Download Skill