mutation-testing
Mutation Testing
Expert knowledge for mutation testing - validating that your tests actually catch bugs by introducing deliberate code mutations.
Core Concept
- Mutants: Small code changes introduced automatically
- Killed: Test fails with mutation (good - test caught the bug)
- Survived: Test passes with mutation (bad - weak test)
- Score: Percentage of mutants killed (aim for 80%+)
TypeScript/JavaScript (Stryker)
Vitest Runner
Installation
# Using Bun
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