What testing frameworks are these patterns compatible with?

While the examples use Jest and TypeScript syntax, the underlying patterns like TDD, Factories, and Fixtures are universal and can be adapted to Vitest, Mocha, or other modern JavaScript testing frameworks.

Can I use this for Test-Driven Development (TDD)?

Absolutely. The skill is built around the Red-Green-Refactor cycle, helping you write failing tests first to define behavior before implementing the minimal code required to pass.

Does this skill support testing asynchronous code?

Yes, it includes specific patterns for testing async functions, including mocking repository layers, handling promises, and verifying behavior in service-level operations.

How does the Factory Pattern help in unit testing?

The Factory Pattern allows you to create consistent, reusable test data with sensible defaults. This reduces boilerplate in your test files and makes your tests more resilient to changes in data structures.

Unit Testing & TDD Patterns

Name: Unit Testing & TDD Patterns
Author: karchtho

bykarchtho

Security & Testing

Implements professional unit testing patterns and Test-Driven Development workflows to ensure robust, maintainable codebases.

About

This skill provides Claude with a comprehensive framework for writing high-quality unit tests using industry-standard patterns. It guides the development process through the Red-Green-Refactor TDD cycle and implements sophisticated testing techniques such as the Factory Pattern for test data, fixtures for complex objects, and specialized strategies for testing pure functions, classes, and asynchronous logic. It is particularly useful for developers looking to improve code coverage and reliability while maintaining a clean, decoupled test suite.

Key Features

Comprehensive strategies for testing pure functions and class methods
Factory patterns for scalable test data and component props
Full TDD cycle implementation (Red-Green-Refactor)
0 GitHub stars
Advanced asynchronous testing patterns for services and repositories
Parameterized test templates for exhaustive edge-case validation

Use Cases

Generating complex mock data and fixtures for enterprise-level service testing
Implementing new features from scratch using a Test-Driven Development approach
Refactoring legacy code by establishing a baseline of isolated unit tests

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add karchtho/my-claude-marketplace unit-testing-patterns

For use in Claude.ai and ChatGPT

Download Skill

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