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gh-133037: Add test for shadowing __annotate__ #133084

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merged 1 commit into from
May 3, 2025
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gh-133037: Add test for shadowing __annotate__ #133084

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19 changes: 19 additions & 0 deletions Lib/test/test_type_annotations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -327,6 +327,25 @@ def check_annotations(self, f):
f.__annotations__ = {"z": 43}
self.assertIs(f.__annotate__, None)

def test_user_defined_annotate(self):
class X:
a: int

def __annotate__(format):
return {"a": str}
self.assertEqual(X.__annotate__(annotationlib.Format.VALUE), {"a": str})
self.assertEqual(annotationlib.get_annotations(X), {"a": str})

mod = build_module(
"""
a: int
def __annotate__(format):
return {"a": str}
"""
)
self.assertEqual(mod.__annotate__(annotationlib.Format.VALUE), {"a": str})
self.assertEqual(annotationlib.get_annotations(mod), {"a": str})


class DeferredEvaluationTests(unittest.TestCase):
def test_function(self):
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