I'm a fan of PHPUnits code coverage reports. And with this sentence I can see a lot of the developers out there shiver, because they are of the opinion, that code coverage reports for unit tests are nonsense and cannot give you any hint on the quality of a test suite. I see it a bit differently. Surely, a high code coverage rate of a test suite does never indicate, that code is well tested (if you have not written the code and tests yourself). But the other way around works: A small code coverage rate definitly means, that the test suite is not sufficient.
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