Code sample for writing python unit tests with the unittest module.

python_unittest.py

import unittest

# Subclass TestCase class
class TestUM(unittest.TestCase):
 
    # Execute code prior to unit tests being run
    def setUp(self):
        pass
 
    # create unit tests using assert methods
    def test_numbers_3_4(self):
        self.assertEqual( multiply(3,4), 12)
 
    # return informative failure messages
    def testFail(self):
        self.assertFalse(True, 'failure message goes here')
 
# Add the following at the end of each test file to run the tests
# Then use 'python unittest_file.py -v' to run the tests
# 'v' flag for verbose
if __name__ == '__main__':
    unittest.main()