def test_second(self):
test_list = List(1, 2, 3)
test_list.append(4)
assert str(List.get_normal_order(test_list)) == "1 2 3 4"
def test_sixth(self):
test_list = List(1, 2, 3)
test_list += [4, 5]
assert str(List.get_normal_order(test_list)) == "1 2 3 4 5"
def test_first(self):
test_list = List(1, 2, 3)
self.assertEqual(str(List.get_normal_order(test_list)), "1 2 3")
def test_third(self):
test_list = List(1, 2, 3, 4)
tail_list = List(5, 6)
test_list += tail_list
assert str(List.get_normal_order(test_list)) == "1 2 3 4 5 6"