Part of being test infected is not being able to go home if your tests aren't 100%.

We have been amazed at how much more fun programming is and how much more aggressive we are willing to be and how much less stress we feel when we are supported by tests.

You will be surprised at how much ground you can cover in a couple of hours if you aren't worrying every second about what you might be breaking.

The next time someone asks you for help debugging, get them to talk about the problem in terms of a fixture and expected results. Then say, "I'd like to write down what you just told me in a form we can use." Have them watch while you write one little test. Run it. Fix it. Write another. Pretty soon they will be writing their own.

Test Infected.

Lecture Notes.