I've been doing some research on Extreme Programming for some Slashdot reviews, and I'm very curious about how it works for free software developers.

One of the most compelling practices of XP is the heavy focus on unit tests. In fact, you're supposed to write the tests before you write the code to pass the tests.

I'm resolving to try this, especially with my Perl Rogue project. (It'll be easier to write unit tests for existing Jellybean code after I have some practice with tests in general.)

Update: I put in the words that jlp pointed out were missing. Don't stay up late and type, kids.