Agent skill · Testing & QA

generating-test-doubles

Generate mocks, stubs, spies, and fakes for dependency isolation. Use when creating mocks, stubs, or test isolation fixtures. Trigger with phrases like "generate mocks", "create test doubles", or "setup stubs". '

jeremylongshoregithub.com/jeremylongshoreGitHub ↗
claude-codecan modify filesships scriptsMIT
Install
npx skills add jeremylongshore/claude-code-plugins-plus-skills --skill generating-test-doubles --agent claude-code

Same command for any agent — swap --agent for codex, cursor, copilot.

Facts
Files in the skill folder: 6
SKILL.md size: 5 KB
Bundled scripts: yes
Version: 1.22.0
Declared author: Jeremy Longshore <jeremy@intentsolutions.io>
Allowed tools: ReadWriteEditGrepGlobBash(test:doubles-*)
Requires: Designed for Claude Code, also compatible with Codex and OpenClaw
Path: skills/.curated/generating-test-doubles/SKILL.md
Open the folder on GitHub →
Where it comes from
Stars: 2,596
Language: Python
Read our review of the source →

Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.

From the SKILL.md

# Test Doubles Generator ## Overview Generate mocks, stubs, spies, and fakes to isolate units under test from external dependencies. Supports Jest mocks, Sinon.js stubs, Python unittest.mock, Go interfaces, and testdouble.js patterns. ## Prerequisites - Testing framework installed (Jest, Vitest, Mocha, pytest, JUnit 5, or Go testing) - Mocking library available (Sinon.js, testdouble.js, unittest.m

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About this skill
What does the generating-test-doubles skill do?

Generate mocks, stubs, spies, and fakes for dependency isolation. Use when creating mocks, stubs, or test isolation fixtures. Trigger with phrases like "generate mocks", "create test doubles", or "setup stubs". '

How do I install it?

Run `npx skills add jeremylongshore/claude-code-plugins-plus-skills --skill generating-test-doubles --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.

Where does this skill come from?

From jeremylongshore/claude-code-plugins-plus-skills, a repository with 2,596 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.

Is a popular skill a good skill?

Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.

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