bpo-45166: fixes `get_type_hints` failure on `Final` (GH-28279)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index fa49b90..d1887f7 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2975,7 +2975,7 @@ else:
 
 # Definitions needed for features introduced in Python 3.6
 
-from test import ann_module, ann_module2, ann_module3
+from test import ann_module, ann_module2, ann_module3, ann_module5, ann_module6
 from typing import AsyncContextManager
 
 class A:
@@ -3339,6 +3339,22 @@ class GetUtilitiesTestCase(TestCase):
                          (Concatenate[int, P], int))
         self.assertEqual(get_args(list | str), (list, str))
 
+    def test_forward_ref_and_final(self):
+        # https://bugs.python.org/issue45166
+        hints = get_type_hints(ann_module5)
+        self.assertEqual(hints, {'name': Final[str]})
+
+        hints = get_type_hints(ann_module5.MyClass)
+        self.assertEqual(hints, {'value': Final})
+
+    def test_top_level_class_var(self):
+        # https://bugs.python.org/issue45166
+        with self.assertRaisesRegex(
+            TypeError,
+            r'typing.ClassVar\[int\] is not valid as type argument',
+        ):
+            get_type_hints(ann_module6)
+
 
 class CollectionsAbcTests(BaseTestCase):