Code Coverage + Test Coverage

Comparison Code Coverage Test Coverage Question Did we execute the code? Did we test all features? Type Quantitative (%) Qualitative (requirements) Approach White-box (code-aware) Black-box (input/output focused) Purpose Find untested code Verify requirements are met Differences Code Coverage measures how much of your source code runs during tests. It's a number: 80%, 90%, etc. Test Coverage measures how well your tests cover actual features and user scenarios. It's about completeness of requirements, not lines of code. Example You can have 100% code coverage (every line executed) but still miss bugs. Why? Because you didn't test what users actually need to do—like "user can log in" - which is low test coverage. Conversely, good test coverage doesn't guarantee every code path was touched. Bottom Line Both metrics work together: Code Coverage = safety net (did we run it?) Test Coverage = quality net (does it work?)