Technical Scaffolding

Well for the moment I'm happing with the idea that Technical facing tests are Scaffolding. They can help you think about the solution you're coming up with, but they are essentially stuff you don't need to keep. I certainly use them that way sometimes - test a small piece of complicated code.

Here's another persons take:
http://www.refactoring.be/articles/tdd-top-down-vs-bottom-up.html