What are the trigger commands for this skill?

You can trigger the skill by asking Claude to generate test doubles or by using the shorthand commands /gen-doubles or /gd.

What testing frameworks does the Test Doubles Generator support?

The skill is optimized for popular frameworks like Jest and Sinon, but it can adapt to various other testing libraries based on your project's configuration.

How does the skill know which dependencies to mock?

Claude performs a dependency analysis of the code under test to identify external services, modules, or functions that require isolation for a clean unit test.

Can I choose between a mock and a stub?

Yes, you can explicitly request a mock for behavior verification, a stub for state-based responses, or a spy for interaction tracking.

Test Doubles Generator

Name: Test Doubles Generator
Author: jeremylongshore

byjeremylongshore

•

884

Security & Testing

Generates mocks, stubs, and spies for unit testing by analyzing code dependencies and framework requirements.

About

The Test Doubles Generator skill simplifies unit testing by automatically creating mocks, stubs, spies, and fakes tailored to your specific codebase. By performing deep dependency analysis on your source files, it intelligently constructs the necessary test infrastructure for popular frameworks like Jest and Sinon. This ensures your tests remain isolated and reliable while significantly reducing the manual overhead and boilerplate code typically required for effective unit testing.

Key Features

Context-aware code insertion ready for unit test integration
Automated dependency analysis of source files
Dedicated /gen-doubles and /gd commands for rapid workflow
Support for major testing frameworks including Jest and Sinon
884 GitHub stars
Generation of multiple double types: mocks, stubs, spies, and fakes

Use Cases

Creating stubs for service dependencies to control behavior during tests
Mocking external API calls to simulate various network responses
Implementing spies to verify interaction patterns with complex objects

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jeremylongshore/claude-code-plugins-plus-skills test-doubles-generator

For use in Claude.ai and ChatGPT

Download Skill

GitHub