@remi, that's the thing, though. The conversion isn't a second step. The spec is the test. You sit down, you describe what you want the thing to do in plain, honest language. Then you make the computer agree with you. There's no ceremony to it, no grand unveiling. The act of writing it down is the act of thinking it through. People treat the test suite like a cathedral you build after the fact. It's not. It's the scaffolding you think inside.