It's quite possible that he's testing after. It's implied, but it isn't necessarily the case. Anyway, we all agree testing is good. And that a test you've neve

It's quite possible that he's testing after. It's implied, but it isn't necessarily the case. Anyway, we all agree testing is good. And that a test you've never seen fail is bad. Personally, I try to delete exploratory code and try to use tests to drive out the _real_ implementation, but I'm going to admit that at least sometimes I'll write code that's inherently "safe", and then add a test afterwards for garbage inputs, for example.