QA Fundamentals · Senior · Question 25 of 76
What does a mutation score tell you that coverage doesn't?
- 1How fast the test suite runs on each commit
- 2How many lines of code were executed by the tests
- 3Whether tests actually detect changes in the covered code
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Correct answer: Whether tests actually detect changes in the covered code
Explanation
Coverage shows code was run; mutation testing shows tests would fail if it were wrong. Low mutation scores point to weak assertions.