[3.13] gh-118895: Call PyType_Ready() on typing.NoDefault (GH-118897) (#118914)

(cherry picked from commit 13d7cf997bc9c22cf67c42fd799413e8325e0039)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

1 files changed, 21 insertions, 2 deletions

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index fff81f7..f6fe953 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -45,7 +45,7 @@ import typing
 import weakref
 import types
 
-from test.support import captured_stderr, cpython_only, infinite_recursion
+from test.support import captured_stderr, cpython_only, infinite_recursion, requires_docstrings
 from test.typinganndata import ann_module695, mod_generics_cache, _typed_dict_helper
 
 
@@ -10247,15 +10247,34 @@ class NoDefaultTests(BaseTestCase):
     def test_constructor(self):
         self.assertIs(NoDefault, type(NoDefault)())
         with self.assertRaises(TypeError):
-            NoDefault(1)
+            type(NoDefault)(1)
 
     def test_repr(self):
         self.assertEqual(repr(NoDefault), 'typing.NoDefault')
 
+    @requires_docstrings
+    def test_doc(self):
+        self.assertIsInstance(NoDefault.__doc__, str)
+
+    def test_class(self):
+        self.assertIs(NoDefault.__class__, type(NoDefault))
+
     def test_no_call(self):
         with self.assertRaises(TypeError):
             NoDefault()
 
+    def test_no_attributes(self):
+        with self.assertRaises(AttributeError):
+            NoDefault.foo = 3
+        with self.assertRaises(AttributeError):
+            NoDefault.foo
+
+        # TypeError is consistent with the behavior of NoneType
+        with self.assertRaises(TypeError):
+            type(NoDefault).foo = 3
+        with self.assertRaises(AttributeError):
+            type(NoDefault).foo
+
 
 class AllTests(BaseTestCase):
     """Tests for __all__."""