I once tried to write something using a pure TDD approach. It was enlightening. Pluses were refactoring was easy and I had confidence that the system would wo

I once tried to write something using a pure TDD approach. It was enlightening. Pluses were refactoring was easy and I had confidence that the system would work well at the end. Minuses were it took a lot longer to write and I had to throw away a lot of code and tests as my understanding increased. It slowed down exploration immensely. Also, factoring the code to be completely testable led to some dubious design decisions that I wouldn't make if I wasn't following a pure TDD approach. On balance I decided it wasn't a generally good way to write code, although I guess there may be some circumstances it works well for.