Which programming languages are supported by this skill?

This skill supports JavaScript, TypeScript, Python, Java, and .NET through integrations with frameworks like Stryker and mutmut.

What is a 'surviving mutant'?

A surviving mutant is a version of your code with an injected bug that your existing test suite failed to catch, indicating a gap in your testing.

Can I integrate mutation testing into my CI/CD workflow?

Yes, the skill provides configuration patterns for GitHub Actions and other CI tools to enforce mutation score thresholds as a quality gate.

What is the difference between mutation testing and code coverage?

Code coverage measures which lines of code were executed during a test, while mutation testing measures if those tests actually detect changes or bugs in the logic.

Is mutation testing slow to run?

It can be resource-intensive, but this skill allows you to run tests on specific files or use parallel processing to optimize performance during development.

Mutation Testing

Name: Mutation Testing
Author: xarlord

byxarlord

0•

보안 및 테스팅

Measures test suite effectiveness by injecting artificial bugs into code to identify gaps in test coverage and logic.

The Mutation Testing skill provides a rigorous evaluation of your test suite's quality by going beyond traditional line coverage metrics. By automatically introducing 'mutations'—small, intentional errors like swapped operators or inverted booleans—it verifies whether your existing tests are capable of detecting these changes. This skill helps developers identify 'surviving mutants' that indicate weak or missing test cases, providing detailed reports and actionable suggestions to improve codebase resilience and prevent regressions in production-critical logic.

주요 기능

01Multi-language support for JavaScript, TypeScript, Python, Java, and .NET

02Detailed reporting on killed vs. surviving mutants with line-by-line analysis

03Automated mutation injection for arithmetic, conditional, and boolean logic

04Smart suggestions for generating new tests to cover identified logic gaps

05Real-time mutation score calculation with customizable quality thresholds

060 GitHub stars

사용 사례

01Identifying logic gaps that standard code coverage metrics frequently miss

02Improving the reliability of automated test suites in CI/CD pipelines

03Auditing critical business logic or security-sensitive code before major releases

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add xarlord/devflow-enforcer mutation-testing

For use in Claude.ai and ChatGPT

주요 기능

01Multi-language support for JavaScript, TypeScript, Python, Java, and .NET

02Detailed reporting on killed vs. surviving mutants with line-by-line analysis

03Automated mutation injection for arithmetic, conditional, and boolean logic

04Smart suggestions for generating new tests to cover identified logic gaps

05Real-time mutation score calculation with customizable quality thresholds

060 GitHub stars

사용 사례

01Identifying logic gaps that standard code coverage metrics frequently miss

02Improving the reliability of automated test suites in CI/CD pipelines

03Auditing critical business logic or security-sensitive code before major releases

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add xarlord/devflow-enforcer mutation-testing

For use in Claude.ai and ChatGPT