UnitTests
---------

Portage has some tests that use the unittest framework that ships with python (2.3-2.4ish)
Tests have a specific naming convention.

in tests/ there is a runTest script that invokes tests/__init__.py

This init looks at a hardcoded list of test dirs to search for tests.
If you add a new dir and don't see your new tests, make sure that the dir is in this list.

On the subject of adding more directories; the layout is basically 1 directory per portage
file at this point (we have few files, and even fewer large files).  Inside of the dir
you should have files of the form test_${function}.py.

So if I was to write a vercmp test, and vercmp is in portage_versions.

tests/portage_versions/test_vercmp.py

would be the filename.

The __init__.py file in tests only goes 1 deep (it's non-recursive, in other words).  If
you end up with more directories it will probably break at present.  Need to replace the
'/' in the directory path with a '.' (for proper importing).  This should be trivial to fix.