My personal mentality about TDD is that it is an unreachable ideal. Striving for it puts you on a good path, but business logic is rarely so straight forward.

My personal mentality about TDD is that it is an unreachable ideal. Striving for it puts you on a good path, but business logic is rarely so straight forward. If you are lucky enough to be writing code in a way that each unit is absolutely clear before you start working, awesome you got it. But in business-logic-land things rarely end up this clean. Personally, I program the happy path then write tests and use them to help uncover edge cases.