Let’s Play: Test-Driven Development is a screencast series featuring Java, test-driven development, and evolutionary design. It chronicles the development of a real software project, warts and all. Each episode is about 15 minutes long. For more videos, see the episode guide.

It's the one-year anniversary of Let's Play TDD! In celebration, new episodes are going up every day this week.

The source code for today's episode is available here. Visit the Let's Play archive for more episodes!

Esko Luontola has posted a video response to this episode. Find his response and my commentary in Episode 141.