def test_case_where_n_equals_10(self):
     """
     the largest prime factor of 10 is 5
     """
     self.assertEqual(largest_prime_factor(10), 5)
 def test_case_where_n_equals_13195(self):
     """
     the largest prime factor of 13195 is 29
     """
     self.assertEqual(largest_prime_factor(13195),29)