Welcome to the world of testing.

Oh, thanks. I am not along, it seems. :)

The XP approach of very simple unit tests, written before the code itself, testing basic and edge cases, is a strong strategy.

XP approach, for those who still haven't heard of it, is an "Extreme Programming" approach. Google for more info. :)

P.S.: Mentioned for the benefit of those reading through the thread. :)