bpo-46345: Add a test case for implicit `Optional` class attribute (GH-30535)

(cherry picked from commit 1de60155d5d01be2924e72fb68dd13d4fd00acd7)

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

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 19c38ec833c676ba69389493aa99ab51596d7416..8cdb1166c847f7cc89b41ec80353459149226ed8 100644 (file)
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2943,6 +2943,12 @@ class GetTypeHintTests(BaseTestCase):
                           'my_inner_a2': mod_generics_cache.B.A,
                           'my_outer_a': mod_generics_cache.A})
 
+    def test_get_type_hints_classes_no_implicit_optional(self):
+        class WithNoneDefault:
+            field: int = None  # most type-checkers won't be happy with it
+
+        self.assertEqual(gth(WithNoneDefault), {'field': int})
+
     def test_respect_no_type_check(self):
         @no_type_check
         class NoTpCheck: