bpo-46685: cover TypeError of ForwardRef(1) in test_typing (GH-31223)

miss-islington · sobolevn · web-flow · commit d29bbc22b085 · 2022-02-09T07:12:17.000-08:00
(cherry picked from commit d2d1d49) Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
@@ -2650,6 +2650,10 @@ def test_forwardref_subclass_type_error(self):
         with self.assertRaises(TypeError):
             issubclass(int, fr)
 
+    def test_forwardref_only_str_arg(self):
+        with self.assertRaises(TypeError):
+            typing.ForwardRef(1)  # only `str` type is allowed
+
     def test_forward_equality(self):
         fr = typing.ForwardRef('int')
         self.assertEqual(fr, typing.ForwardRef('int'))
