bpo-46482: add a test for typing.Annotation.__new__ (GH-30821)

miss-islington · sobolevn · web-flow · commit 6a188d88c562 · 2022-02-01T02:27:36.000-08:00
(cherry picked from commit 4c0612a) Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
@@ -4543,6 +4543,13 @@ class A(typing.Match):
 
 class AnnotatedTests(BaseTestCase):
 
+    def test_new(self):
+        with self.assertRaisesRegex(
+            TypeError,
+            'Type Annotated cannot be instantiated',
+        ):
+            Annotated()
+
     def test_repr(self):
         self.assertEqual(
             repr(Annotated[int, 4, 5]),
