pythongh-118899: Add tests for NotImplemented attribute access

sobolevn · May 10, 2024 · 49d3e6a · 49d3e6a
1 parent 7ac933e
commit 49d3e6a
Showing 1 changed file with 16 additions and 0 deletions.
diff --git a/Lib/test/test_builtin.py b/Lib/test/test_builtin.py
@@ -2138,6 +2138,22 @@ def test_bool_notimplemented(self):
  with self.assertRaisesRegex(TypeError, msg):
  not NotImplemented
 
+ def test_not_implemented(self):
+ self.assertIs(type(NotImplemented), NotImplemented.__class__)
+ self.assertIs(type(NotImplemented).__class__, type)
+
+ # Missing instance attributes:
+ with self.assertRaises(AttributeError):
+ NotImplemented.prop
+ with self.assertRaises(AttributeError):
+ NotImplemented.prop = 1
+
+ # Missing class attributes:
+ with self.assertRaises(AttributeError):
+ type(NotImplemented).prop
+ with self.assertRaises(TypeError):
+ type(NotImplemented).prop = 1
+
 
 class TestBreakpoint(unittest.TestCase):
  def setUp(self):