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

sobolevn · web-flow · commit 1de60155d5d0 · 2022-01-12T15:35:44.000-08:00
diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
@@ -3177,6 +3177,12 @@ def test_get_type_hints_classes(self):
                           '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:
