> I often write code without implementing anything, just the "surface API". That's when I find whether things will work or not. There's an entire school of TDD

> I often write code without implementing anything, just the "surface API". That's when I find whether things will work or not. There's an entire school of TDD which works this way. That's not incompatible at all. > with TDD, I would've spent hours trying to get something working that later I would find, by exploration, that I didn't need at all. If you're writing tests for something you don't need, the problem isn't with TDD as I understand it.