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

(cherry picked from commit d2d1d49eaccaa83eb8873ba15f2fc9562143bc56)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 62762418b3f4a8a3f8fc3a6397182514a002aad8..2842e28c5ab598173eb8a546121c314639350158 100644 (file)
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2650,6 +2650,10 @@ class ForwardRefTests(BaseTestCase):
         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'))