in reply to What goes in a test suite?
What I have done in the past is simply create a script (or collection of them) that runs, many times and in many different permuatations, what a user would do.
The advantage of having something like this is that every time a change is made to the code base, you can re-run the test suite, which could have as many test cases you want, it can run them all for you and report on what succeded and what did not.
Constant testing (like, every 5 minutes) is a foundation of Extreme Programming (XP), a programming philosophy which I have come to enjoy using, in moderation of course :-).
"Violence is a last resort of the incompetent" - Salvor Hardin, Foundation by Issac Asimov