Can this skill help with mocking external APIs?

Yes, it includes specific patterns for mocking global fetch, using module mocks, and implementing dependency injection to isolate code from external API dependencies.

Is this skill suitable for frontend testing?

While it focuses on core logic patterns, it includes support for Testing Library, making it highly effective for testing React, Vue, and other component-based frontend frameworks.

Which testing frameworks are supported by this skill?

The skill provides comprehensive support and configuration patterns for both Jest and Vitest, the two most popular modern JavaScript testing frameworks.

How does this skill handle TypeScript?

All patterns and configurations are optimized for TypeScript, including type-safe mocks, interface-based dependency injection, and ts-jest/vitest-native TS support.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: as4584

byas4584

Security & Testing

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

About

This skill equips Claude with advanced patterns for implementing comprehensive testing suites in JavaScript and TypeScript environments. It provides standardized guidance for setting up test infrastructure, writing unit tests for functions and classes, and creating complex integration tests for APIs. By leveraging modern frameworks like Jest and Vitest alongside Testing Library, the skill helps developers implement sophisticated mocking, dependency injection, and asynchronous testing patterns that ensure high code quality and reliable CI/CD pipelines.

Key Features

Patterns for testing pure functions, classes, and asynchronous service layers.
0 GitHub stars
Advanced mocking strategies for modules, global fetch, and external APIs.
Production-ready configuration for Jest and Vitest in TypeScript projects.
Integrated testing coverage thresholds and CI/CD best practices.
Dependency injection techniques to improve code testability and modularity.

Use Cases

Setting up a complete testing infrastructure for a new TypeScript backend or frontend project.
Mocking complex third-party dependencies like nodemailer or external REST APIs during integration testing.
Implementing Test-Driven Development (TDD) by generating test cases before feature implementation.

About

Key Features

Patterns for testing pure functions, classes, and asynchronous service layers.
0 GitHub stars
Advanced mocking strategies for modules, global fetch, and external APIs.
Production-ready configuration for Jest and Vitest in TypeScript projects.
Integrated testing coverage thresholds and CI/CD best practices.
Dependency injection techniques to improve code testability and modularity.

Use Cases

Setting up a complete testing infrastructure for a new TypeScript backend or frontend project.
Mocking complex third-party dependencies like nodemailer or external REST APIs during integration testing.
Implementing Test-Driven Development (TDD) by generating test cases before feature implementation.