def test_append_list(): L = [1, 2, 3] append(L, [4, 5, 6]) assert L == [1, 2, 3, 4, 5, 6]
def test_append_set_to_list(): s = set([3, 4, 5]) lst = [1, 2, 3] append(lst, s) assert sorted(lst) == [1, 2, 3, 3, 4, 5]
def test_append_tuple_to_set(): s = set([1, 2, 3]) append(s, (3, 4, 5)) assert s == set([1, 2, 3, 4, 5])
def test_append_list_to_set(): s = set([1, 2, 3]) append(s, [4, 5, 6]) assert s == set([1, 2, 3, 4, 5, 6])