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gh-124498: Fix TypeAliasType not to be generic, when type_params=() (#124499)

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sobolevn 2024-09-26 17:15:38 +03:00 • committed by GitHub
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commit abe5f799e6
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3 changed files with 25 additions and 1 deletions
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13
Lib/test/test_type_aliases.py
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@ -211,6 +211,19 @@ class TypeAliasConstructorTest(unittest.TestCase):
self.assertEqual(TA.__value__, list[T])
self.assertEqual(TA.__type_params__, (T,))
self.assertEqual(TA.__module__, __name__)
self.assertIs(type(TA[int]), types.GenericAlias)
def test_not_generic(self):
TA = TypeAliasType("TA", list[int], type_params=())
self.assertEqual(TA.__name__, "TA")
self.assertEqual(TA.__value__, list[int])
self.assertEqual(TA.__type_params__, ())
self.assertEqual(TA.__module__, __name__)
with self.assertRaisesRegex(
TypeError,
"Only generic type aliases are subscriptable",
):
TA[int]
def test_keywords(self):
TA = TypeAliasType(name="TA", value=int)