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gh-115165: Fix Annotated for immutable types #115213

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Merged
AlexWaygood merged 6 commits into from
Feb 9, 2024
Merged

gh-115165: Fix Annotated for immutable types #115213

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b87995b
gh-115165: Fix Annotated for immutable types
dave-shawley Feb 9, 2024
1d7e6e5
fixup! gh-115165: Fix Annotated for immutable types
dave-shawley Feb 9, 2024
ff5e885
fixup! gh-115165: Fix Annotated for immutable types
dave-shawley Feb 9, 2024
7289af4
fixup! gh-115165: Fix Annotated for immutable types
dave-shawley Feb 9, 2024
7fcb394
fixup! gh-115165: Fix Annotated for immutable types
dave-shawley Feb 9, 2024
702ba2c
Small tweaks
AlexWaygood Feb 9, 2024
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fixup! gh-115165: Fix Annotated for immutable types 
Renamed test_annotated_callable_returning_immutable to
test_instantiate_immutable and moved it near the other instantiation
tests.
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@dave-shawley
dave-shawley committed Feb 9, 2024
commit 7289af40d46f34c92a3159de2a357b2a68c5269b
18 changes: 8 additions & 10 deletions Lib/test/test_typing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8492,6 +8492,14 @@ def test_instantiate_generic(self):
self.assertEqual(MyCount([4, 4, 5]), {4: 2, 5: 1})
self.assertEqual(MyCount[int]([4, 4, 5]), {4: 2, 5: 1})

def test_instantiate_immutable(self):
class C:
def __setattr__(self, key, value):
raise Exception("should be ignored")

A = Annotated[C, "a decoration"]
self.assertIsInstance(A(), C)

def test_cannot_instantiate_forward(self):
A = Annotated["int", (5, 6)]
with self.assertRaises(TypeError):
Expand Down Expand Up @@ -8756,16 +8764,6 @@ class B(str): ...
self.assertIs(type(field_c2.__metadata__[0]), float)
self.assertIs(type(field_c3.__metadata__[0]), bool)

def test_annotated_callable_returning_immutable(self):
class C:
def __setattr__(self, name, value):
raise Exception('should be ignored')

class A(str): ...

annotated = Annotated[C, A("A")]
self.assertIsInstance(annotated(), C)


class TypeAliasTests(BaseTestCase):
def test_canonical_usage_with_variable_annotation(self):
Expand Down