The measurement of test coverage is often used as indicator of software quality. This is OK but be a aware of following interpretation of this number, if the test coverage is low that means:
- You have to write tests
- You are in trouble because your code is not developed in the TDD way and the code is not easy to extend or to maintain.
On the other hand if the code coverage is high, this means nothing. Or with other words:
High code coverage != High quality code
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