Where are the tests hidden?

[Peter Wood]

It will probably be a long time before I have the necessary knowledge to make changes to the engine. However, I'm pretty sure that I, and probably a lot more LiveCoders, could help write tests. I have an affinity for bugs, most of my code is full of them The only thing is I can't find the tests. Where are they hidden?

[mwieder]

It's a good question. I've heard rumors of unit tests and/or some other way of doing some functional-level testing, but haven't seen anything.