def test_equals_2(self):
     self.assertEqual(sum('1', 1, '2', 2), 3)
 def test_equals_2(self):
     self.assertEqual(sum("1", 1, "2", 2), 3)
 def test_equals(self):
     self.assertEqual(sum(1, 2, 3), 6)
 def test_equals(self):
     self.assertEqual(sum(1, 2, 3), 6)