pre_unit_test.py

import unittest

class Tests(unittest.TestCase):
    def test_bigger(self):
        self.assertTrue( 1 < 0 )

    def test_equals(self):
        self.assertEqual( 1+1, 2 )

    def test_div(self):
        with self.assertRaises(ZeroDivisionError):
            1 / 0

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