What is mutation testing?

Mutation testing is a method where small logic changes (mutations) are introduced to your code to see if your existing tests detect them, measuring the true effectiveness of your test suite.

When should I use the Mutation Testing skill?

Use this skill when you want to ensure your tests are robust, especially for complex or high-risk modules where passing tests might still miss subtle bugs.

How does this differ from standard code coverage?

Standard coverage only shows which lines were executed. Mutation testing shows if the tests actually validate the correctness of the logic on those lines.

What are surviving mutants?

Surviving mutants are code changes that were not caught by any test, highlighting specific areas where your test suite needs to be strengthened.

Mutation Testing & Test Effectiveness

Name: Mutation Testing & Test Effectiveness
Author: jeremylongshore

byjeremylongshore

•

884

•

보안 및 테스팅

Validates test suite effectiveness by performing automated mutation testing to identify logic gaps and improve code reliability.

This skill empowers Claude to go beyond simple code coverage by executing mutation testing, a rigorous method for validating the quality of a test suite. By introducing small, intentional changes—or 'mutations'—into the source code and running the existing tests against them, the skill determines if the test suite is capable of detecting these errors. It provides detailed reports on the mutation score and identifies 'surviving mutants,' allowing developers to pinpoint specific weaknesses in their testing logic and ensure critical business rules are properly verified.

주요 기능

01884 GitHub stars

02Real-time execution of test suites against mutated code

03Analysis of test effectiveness vs. simple line coverage

04Automatic generation of code mutations to simulate bugs

05Detailed mutation score calculation and reporting

06Identification of surviving mutants for targeted test improvements

사용 사례

01Auditing the reliability of a critical module's test suite

02Improving test cases by analyzing logic that failed to catch code mutations

03Assessing project-wide test quality using mutation score metrics

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jeremylongshore/claude-code-plugins-plus-skills skill-adapter

For use in Claude.ai and ChatGPT

Download Skill