Does it support both JavaScript and TypeScript?

Yes, all patterns and configurations are optimized for both JavaScript and TypeScript, including type-safe mocking and test definitions.

Which testing frameworks does this skill support?

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

How does it help with Test-Driven Development (TDD)?

It provides the structural boilerplate and logic patterns needed to write failing tests first, helping you define expected behavior before writing implementation code.

Can this skill help with mocking external dependencies?

Yes, it includes specific patterns for mocking modules (like nodemailer), global APIs (like fetch), and utilizing dependency injection for testable architecture.

JavaScript Testing Patterns

Name: JavaScript Testing Patterns
Author: HermeticOrmus

byHermeticOrmus

0•

安全与测试

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

This skill provides specialized guidance for architecting and implementing robust testing suites across the JavaScript and TypeScript ecosystem. It offers standardized patterns for unit, integration, and end-to-end testing, covering critical areas such as mocking external dependencies, testing asynchronous logic, and setting up optimized test environments. By leveraging industry-standard practices for Jest, Vitest, and Testing Library, this skill helps developers maintain high code quality, implement TDD/BDD workflows, and ensure reliability in complex production applications.

主要功能

010 GitHub stars

02Best practices for dependency injection and function spying

03Advanced mocking strategies for modules, APIs, and dependencies

04Standardized configurations for Jest and Vitest frameworks

05Proven patterns for testing pure functions, classes, and async code

06Integration-ready templates for TDD and BDD workflows

使用场景

01Setting up a complete testing infrastructure for new TypeScript services

02Refactoring legacy codebases with comprehensive unit and integration tests

03Mocking external API responses and database layers to isolate unit logic

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add hermeticormus/hermetic-line javascript-testing-patterns

For use in Claude.ai and ChatGPT

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