4 ms·

Tests, baby

• thfuran 2y ago
  Tests don't really help you when a newly discovered bug affects logic copied in ten places and you're only aware of two of them. You can add a regression test to the places that you update, but not the others. And then if there's another bug discovered in the duplicated code, a different subset of the copies might get changed and have tests added. Suddenly it looks like these different versions of the repeated logic are intended to be behaving differently for some unknown reason even though the divergence is purely accidental.