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When To Test

Kenneth Fisher thinks about when to test:

To test or not to test. That is the question. Or is it? Shouldn’t we always test? That was the question posted here. It’s a big question so let’s break it down a bit.

My short answer is:  test as much as necessary to keep two conditions from occurring:  first, that you get fired (or worse); second, that the inevitable bug somebody else discovers in your code is too embarrassing.  Kenneth’s answer is better.