[Zope] Unit testing in Zope 2.x

I just read Unit testing chapter of the excellent "Dive into python" book. (www.diveintopython.org) I know that Zope 3 development use Unit Testing modules extensibly. I wonder if anyone use Unit Testing for Zope 2.x product development? Any advices or insights? Wich modules do I need to import, path setting, etc.?