Jest testing patterns, anti-patterns, and quality rules for JavaScript and TypeScript test files (*.test.ts, *.spec.js, __tests__). Includes deterministic test-smell detector (jest_smell.py) for .only/.skip left in, missing expects, async-without-await, setTimeout(0), console.log, and done callbacks. Use proactively when reviewing or writing Jest test files, diagnosing flaky or unreliable JavaScript test suites, code-reviewing test files, or running a CI quality gate on test file hygiene. Run the smell detector for deterministic issue detection.
How to install jest-patterns?
everyone-needs-a-copilot/claude-copilot/jest-patterns
$npx -y skills add everyone-needs-a-copilot/claude-copilot --skill jest-patternsInstalls into the current project.
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Run `npx skills use "https://github.com/everyone-needs-a-copilot/claude-copilot" --skill "everyone-needs-a-copilot/claude-copilot/jest-patterns"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/everyone-needs-a-copilot/claude-copilot" that are relevant to the current task. Run `npx skills add "https://github.com/everyone-needs-a-copilot/claude-copilot"` and select the relevant skills, then follow their instructions.
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