Can I use this for frontend component testing?

Yes, it includes patterns suitable for Testing Library and is designed to work with frontend frameworks like React and Vue.

Which testing frameworks does this skill support?

It primarily supports Jest and Vitest, including setup configurations and advanced implementation patterns for both frameworks.

Does it cover end-to-end (E2E) testing?

Yes, the skill provides guidance for implementing E2E testing strategies to validate complete user flows.

How does it handle external API dependencies?

It offers multiple mocking patterns, including global fetch mocks and module-level overrides, to effectively isolate tests from external services.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: carlopezzuto

bycarlopezzuto

0•

Security & Testing

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

This skill provides Claude with expert-level guidance for creating comprehensive test suites in JavaScript and TypeScript environments. It covers everything from initial test infrastructure setup to advanced mocking patterns, dependency injection for testability, and async function testing. By utilizing this skill, developers can ensure higher code quality through unit, integration, and end-to-end testing following TDD/BDD best practices with standardized configurations for Jest and Vitest, ultimately leading to more maintainable and resilient codebases.

Key Features

010 GitHub stars

02Standardized Jest and Vitest configuration templates

03Comprehensive guides for unit, integration, and E2E testing

04Advanced mocking patterns for modules and external APIs

05Dependency injection strategies for enhanced testability

06Best practices for testing async functions and class-based services

Use Cases

01Refactoring legacy code to be more testable using dependency injection

02Mocking complex external dependencies like databases or third-party APIs

03Setting up a new testing environment for a TypeScript project

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add carlopezzuto/agents javascript-testing-patterns

For use in Claude.ai and ChatGPT

Download Skill