Today I wrote my first TDD test (with help from my pair partner, obviously). It was fun watching it fail, then fixing it so it failed the way we expected, then fixing the code to make it pass. The code works. The test works. I feel a surge of enthusiasm now that I have a green bar, and I would like to share this special moment with you all.
Small steps.
Liz Keogh, lunivore 
I also liked that thrill the first time 🙂
Now try this: class with tests > new behavior > refactor inside > red bars > fixes > green bar no need to worry about side effects!
I can hardly wait.