TDD is about incremental change and improvement. It is great for finding local maxima but the best solution might require a radical rethink. The opportunity cost in this case is that we get trapped in this local maximum and miss a bigger win.

~ Dan North

Given all the hundreds of books we’ve seen on how to get started on test-driven development, I wish there’d be just one or two that’d focus on how to tame the beast.

~ DHH

What is TDD about?

"TDD is not about taking teeny-tiny steps, it's about being able to take teeny-tiny steps. Would I code day-to-day with steps this small? No. But when things get the least bit weird, I'm glad I can. Try teeny-tiny steps with an example of your own choosing. If you can make steps too small, you can certainly make steps the right size. If you only take larger steps, you'll never know if smaller steps are appropriate."

-- Kent Beck

Failure is progress

Failure is progress. Now we have a concrete measure of failure. That's better than just vaguely knowing we a re failing. Our programming problem has been transformed from "give me multi-currency" to "make this test work, and then make the rest of the tests work." Much simpler. Much smaller scope for fear. We can make this test work.

-- Kent Beck, about a failing test