I like this idea. Aiming for a high coverage is good, but it's equally if not more important that your tests are flexible and assert the right conditions. Simply because your test has hit a line of code doesn't imply that it has meaningfully tested that line of code. That being said, there is no chance that a line of code is tested if it isn't covered, so any changes to it could result in defects or issues refactoring.
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I like this idea. Aiming for a high coverage is good, but it's equally if not more important that your tests are flexible and assert the right conditions. Simply because your test has hit a line of code doesn't imply that it has meaningfully tested that line of code. That being said, there is no chance that a line of code is tested if it isn't covered, so any changes to it could result in defects or issues refactoring.