[Zope-CMF] unit test weirdness.

[Lennart Regebro]

I noticed a thing I don't really understand with the CMF unit tests.

If I run
    python utilities/testrunner.py -d ./lib/python/Products/CMFCore
The unit tests all fail, mostly because of import errors.

However, if I run
    python utilities/testrunner.py -d ./lib/python/Products
the CMFCore tests are successfully run. The same goes for CMFCalendar, 
CMFDefault

I feel there is some major voodo when it comes to these unit tests that 
I don't understand, but would like to understand. Can anybody explain 
this to me?