def test_if_m_equals_zero(self):
     self.assertEqual(is_multiple(0, 0), False)
 def test_n_is_negative_and_valid(self):
     self.assertEqual(is_multiple(-4, 2), True)
 def test_if_n_lessthan_m(self):
     self.assertEqual(is_multiple(1, 2), False)
 def test_valid_case_2(self):
     self.assertEqual(is_multiple(4, 2), True)