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gh-118899: Add tests for NotImplemented attribute access #118902

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Merged
sobolevn merged 3 commits into from
May 12, 2024
Merged

gh-118899: Add tests for NotImplemented attribute access #118902

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gh-118899: Add tests for `NotImplemented` attribute access
sobolevn May 10, 2024
abaff2f
Also test `...`
sobolevn May 12, 2024
8550f84
Address review
sobolevn May 12, 2024
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18 changes: 18 additions & 0 deletions Lib/test/test_builtin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2138,6 +2138,24 @@ def test_bool_notimplemented(self):
with self.assertRaisesRegex(TypeError, msg):
not NotImplemented

def test_singleton_attribute_access(self):
for singleton in (NotImplemented, Ellipsis):
with self.subTest(singleton):
self.assertIs(type(singleton), singleton.__class__)
self.assertIs(type(singleton).__class__, type)

# Missing instance attributes:
with self.assertRaises(AttributeError):
singleton.prop
with self.assertRaises(AttributeError):
singleton.prop = 1
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# Missing class attributes:
with self.assertRaises(AttributeError):
type(singleton).prop
with self.assertRaises(TypeError):
type(singleton).prop = 1


class TestBreakpoint(unittest.TestCase):
def setUp(self):
Expand Down