def test_ordering(self):
self.assertEqual(
("a", "b", "c"),
tuple(
ImmutableSet.builder(order_key=lambda x: x).add_all(
["b", "c", "a"]).build()),
)
def test_empty_singleton(self):
empty1 = immutableset()
empty2 = immutableset()
self.assertIs(empty1, empty2)
empty3 = ImmutableSet.builder().build()
self.assertIs(empty1, empty3)
empty4 = immutableset([])
self.assertIs(empty1, empty4)
def test_empty(self):
empty = immutableset()
self.assertEqual(0, len(empty))
empty2 = immutableset([])
self.assertEqual(0, len(empty2))
self.assertEqual(empty, empty2)
empty3 = ImmutableSet.builder().build()
self.assertEqual(0, len(empty3))
self.assertEqual(empty, empty3)
def __init__(
self,
*,
source: Optional["ImmutableMultiDict[KT2,VT2]"] = None,
order_key: Callable[[VT2], Any] = None,
) -> None:
self._dict: MutableMapping[
KT2, ImmutableSet.Builder[VT2]] = defaultdict(
lambda: ImmutableSet.builder(order_key=order_key))
self._source = source
self._dirty = False