Unittest tests for our example function.

parse_conn_unittest.py

from parse_conn import parse_connection
import unittest

class InvalidInputs(unittest.TestCase):
    def testNoAt(self):
        """parse_connection should raise an exception 
           for an invalid connection string"""
        self.assertRaises(ValueError, parse_connection, 'invalid uri')

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