Dave Marshall has shared his method behind using test-driven development in his recent development.

I've been watching the Destroy All Software back catalog over the last couple of months and it's really inspired me to up my TDD game. I'm still fairly new to TDD, I've written tests for a long time, but never really let it lead my development…

He talks about the testing tool he uses and some of the ideals he keeps in mind when developing his tests. He also comments on testing isolation, speed of execution, the "fail fast" idea as well as integration testing and continuous integration.