Mutate source code and validate test suite detection of changes.
npx skills add https://github.com/sburl/CrossCheck --skill mutation-test-sburl
Please help me install this Agent Skill. Skill: mutation-test Source: https://github.com/sburl/CrossCheck/tree/main/codex/skills/mutation-test Command: npx skills add https://github.com/sburl/CrossCheck --skill mutation-test-sburl
Mutation testing helps verify that a test suite actually catches bugs by introducing small, intentional code mutations and checking whether tests fail. This approach provides a concrete measure of test effectiveness beyond traditional coverage metrics.
Run the mutation-test command to generate and evaluate a batch of mutants against your test suite and identify weaknesses.
High-intent search queries and answers about installing and using this skill.
Mutation testing exposes weak tests by automatically injecting small code mutations and verifying if your test suite detects them. It provides a measurable mutation score that reveals test effectiveness beyond basic coverage metrics.
Yes, this mutation testing approach supports Stryker for deep mutations in JavaScript and TypeScript projects. It evaluates generated mutants against your test suite to identify surviving code changes.
The best way to measure test quality beyond coverage is calculating a mutation score. By mutating source code and validating test failures, you get actionable feedback highlighting surviving mutants and suggested tests.
Yes, it supports language-specific deep mutators including mutmut for Python and go-mutesting for Go. It also provides a zero-install Bash mutator for quick, broad mutation passes across any environment.
Run the mutation-test command to generate and evaluate a batch of mutants against your test suite. This process identifies surviving mutants and provides actionable feedback to guide test improvements.
High coverage does not guarantee tests catch bugs because coverage only measures execution paths. Mutation testing solves this by introducing intentional code mutations to check if tests actually fail when bugs are introduced.
copyleftdevInject faults into source code and calculate mutation scores for test suites.
proffesor-for-testingMutate TypeScript/JavaScript code to measure test suite effectiveness.
ArdurAICovers unit, integration, E2E, performance, chaos, fuzz, and mutation testing methodologies.
frogguguguguExecute SCA, SAST, DAST, and secret detection scans to report vulnerabilities.
