Python: How to run unittest.main() for all source files in a subdirectory?

Question

I am developing a Python module with several source files, each with its own test class derived from unittest right in the source. Consider the directory structure:

Answer 1

Here is my test discovery code that seems to do the job. I wanted to make sure I can extend the tests easily without having to list them in any of the involved files, but also avoid writing all tests in one single Übertest file.

So the structure is

myTests.py
testDir\
    __init__.py
    testA.py
    testB.py

myTest.py look like this:

import unittest

if __name__ == '__main__':
    testsuite = unittest.TestLoader().discover('.')
    unittest.TextTestRunner(verbosity=1).run(testsuite)

I believe this is the simplest solution for writing several test cases in one directory. The solution requires Python 2.7 or Python 3.