[Zope-dev] Testing my product

I have had a lot of interest in a couple of my products, and I would like to ensure they are as stable as I can make them. I have heard a lot on here about unit-testing, is there a guide to creating unit-tests? Is there a procedure, or something to follow so that I can be sure I am testing "the right things"? Any help would be greatly appreciated. Adrian... -- Adrian Hungate All views expressed in this email are those of the whole world, however some people don't realise this yet.