[Product Developers] Mentorware - Unit testing?

[Dave Marsden]

Hello

Me and some other budding Plone Product developers could probably use some examples of how to do stuff, and I always like to crib from working code.

So... my first request for some 'mentorware' is for an example (or examples) of Plone Products where the automated testing is "done right".  

Any suggestions?

Cheers

Dave