Which frameworks does this skill support?

This skill primarily supports Jest and Vitest, the two most popular modern testing frameworks for JavaScript and TypeScript ecosystems.

Is it compatible with TypeScript?

Yes, all patterns and configurations provided are designed to work seamlessly with TypeScript, including full type safety for mocks and test suites.

Can I use this for frontend component testing?

Yes, the skill includes patterns for Testing Library, which is the industry standard for testing React, Vue, and other frontend UI components.

Does it help with mocking external APIs?

Absolutely. It provides specific patterns for mocking modules, spying on functions, and using dependency injection to isolate code from external API calls during tests.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: HermeticOrmus

byHermeticOrmus

Security & Testing

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

About

The JavaScript Testing Patterns skill provides a comprehensive toolkit for implementing high-quality test suites in modern JS/TS environments. It offers standardized patterns for unit testing pure functions and classes, mocking external dependencies, handling asynchronous operations, and setting up complex test infrastructures. By following these industry-standard practices for Jest and Vitest, developers can ensure higher code reliability, maintainable test suites, and streamlined TDD/BDD workflows across both frontend and backend projects.

Key Features

Support for Jest and Vitest frameworks
Asynchronous testing and dependency injection patterns
0 GitHub stars
Advanced mocking patterns for modules and APIs
Test-driven development (TDD) best practices
Standardized setup for unit and integration tests

Use Cases

Setting up a new testing environment for a TypeScript project
Mocking complex external dependencies like API calls or databases
Refactoring legacy code with robust unit and integration tests

About

Key Features

Support for Jest and Vitest frameworks
Asynchronous testing and dependency injection patterns
0 GitHub stars
Advanced mocking patterns for modules and APIs
Test-driven development (TDD) best practices
Standardized setup for unit and integration tests

Use Cases

Setting up a new testing environment for a TypeScript project
Mocking complex external dependencies like API calls or databases
Refactoring legacy code with robust unit and integration tests