>Why would tests make this code more likely? Code like this is basically only possible through testing, because the programmer doesn't understand why it is wor

>Why would tests make this code more likely? Code like this is basically only possible through testing, because the programmer doesn't understand why it is working: it says so in the comment, which I believe. So if it weren't written against testing (manual or automatic) it simply couldn't be written like this. There are a lot of really broken designs that "work". Testing gets you "working" code. Often you could do much better starting with correct code and then adding testing afterward - which I believe is not the essence of TDD. TDD is about driving the writing of code by tests, and I believe the example I shared is one of these bad outcomes. (There are others.)