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[3.12] gh-107905: Test raising __value__ for TypeAliasType (GH-107997) #108217

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Merged
merged 1 commit into from
Aug 21, 2023
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[3.12] gh-107905: Test raising __value__ for TypeAliasType (GH-107997) #108217

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18 changes: 18 additions & 0 deletions Lib/test/test_type_aliases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -168,6 +168,24 @@ def test_recursive_repr(self):
self.assertEqual(repr(GenericRecursive[GenericRecursive[int]]),
"GenericRecursive[GenericRecursive[int]]")

def test_raising(self):
type MissingName = list[_My_X]
with self.assertRaisesRegex(
NameError,
"cannot access free variable '_My_X' where it is not associated with a value",
):
MissingName.__value__
_My_X = int
self.assertEqual(MissingName.__value__, list[int])
del _My_X
# Cache should still work:
self.assertEqual(MissingName.__value__, list[int])

# Explicit exception:
type ExprException = 1 / 0
with self.assertRaises(ZeroDivisionError):
ExprException.__value__


class TypeAliasConstructorTest(unittest.TestCase):
def test_basic(self):
Expand Down