Chapter 2. Beginning TDD

Experience is a hard teacher because she gives the test first, the lesson afterward.

Chinese proverb

Something big airports are generally very good at is using signs. No matter which airport I fly from, I never have to worry about not knowing which way to turn from a corner. Whenever I no longer know which way to walk, I look up and there it is: the sign that says, “Gate 42: continue straight forward.”

It wasn’t like that when I started writing software for a living. There was just one sign outside the terminal building saying, “Good luck.” Figuring out what I should change and ending up with a correct solution was a bit like trying to find your way to the right gate at Heathrow without the hundreds of signs and displays. ...

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