Yeah, but if you're prototyping, then that shouldn't be the actual code you use. You write a prototype to test your assumptions, have the people bang on it for

Yeah, but if you're prototyping, then that shouldn't be the actual code you use. You write a prototype to test your assumptions, have the people bang on it for a bit, then throw it away. You take the lessons you've learned from that, and now you have more of a "spec" than you did before. Thus, you can write your tests.