Does this skill support both Jest and Vitest?

Yes, it provides comprehensive configuration templates and testing patterns for both Jest and Vitest frameworks, including setup for TypeScript.

Can I use this for frontend component testing?

Absolutely. It includes patterns for Testing Library, which is the industry standard for testing React, Vue, and other modern frontend frameworks.

How does it handle external API dependencies?

The skill offers multiple mocking patterns, including global fetch mocking, module spying, and dependency injection to isolate your code from external API calls.

Does it help with Test-Driven Development?

Yes, it provides the structural guidance and boilerplate needed to implement TDD or BDD workflows, helping you write tests before your implementation code.

Is it suitable for TypeScript projects?

Yes, all provided patterns and code examples are specifically designed to work with TypeScript, ensuring type safety throughout your test suites.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: carloscroc

bycarloscroc

0•

Security & Testing

Implements robust unit, integration, and end-to-end testing strategies for JavaScript and TypeScript applications.

This skill provides specialized guidance for architecting and implementing comprehensive test suites in JavaScript and TypeScript projects. It offers ready-to-use patterns for modern frameworks like Jest and Vitest, covering everything from pure function unit tests and class-based service testing to complex asynchronous operations and module mocking. By integrating best practices for Test-Driven Development (TDD) and dependency injection, it helps developers build maintainable, bug-resistant codebases with high test coverage and reliable CI/CD integration.

Key Features

01Implementation strategies for Unit, Integration, and E2E tests

02Dependency injection patterns to improve code testability

03Advanced mocking patterns for modules and external APIs

04Test-Driven Development (TDD) and BDD workflow guidance

05Configuration templates for Jest and Vitest environments

060 GitHub stars

Use Cases

01Setting up a new testing infrastructure for a TypeScript project

02Creating reliable integration tests for APIs and services

03Refactoring legacy code with robust test coverage and mocking

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add carloscroc/fitness javascript-testing-patterns

For use in Claude.ai and ChatGPT

Download Skill