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[3.12] gh-118168: Fix Unpack interaction with builtin aliases (GH-118169) (#118178)

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Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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Miss Islington (bot) 2024-04-23 15:57:36 +02:00 • committed by GitHub
parent fbe29e639d
commit 30e25d4ff9
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3 changed files with 39 additions and 2 deletions
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32
Lib/test/test_typing.py
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@ -979,6 +979,38 @@ class UnpackTests(BaseTestCase):
self.assertEqual(repr(foo.__annotations__['kwargs']),
f"typing.Unpack[{__name__}.Movie]")
def test_builtin_tuple(self):
Ts = TypeVarTuple("Ts")
class Old(Generic[*Ts]): ...
class New[*Ts]: ...
PartOld = Old[int, *Ts]
self.assertEqual(PartOld[str].__args__, (int, str))
self.assertEqual(PartOld[*tuple[str]].__args__, (int, str))
self.assertEqual(PartOld[*Tuple[str]].__args__, (int, str))
self.assertEqual(PartOld[Unpack[tuple[str]]].__args__, (int, str))
self.assertEqual(PartOld[Unpack[Tuple[str]]].__args__, (int, str))
PartNew = New[int, *Ts]
self.assertEqual(PartNew[str].__args__, (int, str))
self.assertEqual(PartNew[*tuple[str]].__args__, (int, str))
self.assertEqual(PartNew[*Tuple[str]].__args__, (int, str))
self.assertEqual(PartNew[Unpack[tuple[str]]].__args__, (int, str))
self.assertEqual(PartNew[Unpack[Tuple[str]]].__args__, (int, str))
def test_unpack_wrong_type(self):
Ts = TypeVarTuple("Ts")
class Gen[*Ts]: ...
PartGen = Gen[int, *Ts]
bad_unpack_param = re.escape("Unpack[...] must be used with a tuple type")
with self.assertRaisesRegex(TypeError, bad_unpack_param):
PartGen[Unpack[list[int]]]
with self.assertRaisesRegex(TypeError, bad_unpack_param):
PartGen[Unpack[List[int]]]
class TypeVarTupleTests(BaseTestCase):
def assertEndsWith(self, string, tail):