Let's move test_support in unittest !

Then maybe, let's expose some of test_support functions into a new class on the top of unittest.TestCase, so they can be used via methods.
 
The purpose is power up people when it comes to write test fixtures or work in a testing environment. These helpers were built to test Python itself, are quite unknown out there. I think it's a shame :)

http://docs.python.org/library/test.html#module-test.test_support