def test_add(self):
a = A()
div = Div()
result = div + a
self.assertTrue(a in result)
self.assertFalse(a in div)
self.assertEqual(result[0], a)
self.assertIsNot(div, result)
same_check = div.clone()(a)
self.assertEqual(same_check, result)
def test_hash(self):
div1 = Div()
div2 = div1.clone()
test_dict = {div1: 0}
test_dict[div2] = 1
self.assertEqual(len(test_dict), 2)
