def test_toposet_with_items_added_from_a_set_is_equal_to_the_set(items):
t = TopoSet()
for item in items:
t.add(item)
assert t == items
def test_toposet_updated_from_iterable_without_duplicates_has_same_length(
items):
t = TopoSet()
for item in items:
t.add(item)
assert list(t) == items