Python: Run Python tests using -m

Run Python tests using -m.md

python -m <path/to/test/directory/>.<name_of_test_file>

Given the following directory structure:

└── test
    ├── __init__.py
    ├── foo.py
    └── bar.py

You can execute the tests in each file like so:

python -m test.foo
python -m test.bar

This requires the code to use:

if __name__ == '__main__':
    unittest.main()