From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Wed, 16 Apr 2025 15:45:29 +0000 (+0200)
Subject: [3.13] typing: Add missing test case for Protocol inheritance (GH-132597) (#132603)
X-Git-Tag: v3.13.4~263
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=88d95c352965d92a9916bccc3b0dac65ab83c532;p=thirdparty%2FPython%2Fcpython.git

[3.13] typing: Add missing test case for Protocol inheritance (GH-132597) (#132603)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
---

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 9dc719a27575..e1115809d4f3 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2935,6 +2935,23 @@ class ProtocolTests(BaseTestCase):
         self.assertNotIsInstance(D(), E)
         self.assertNotIsInstance(E(), D)
 
+    def test_inheritance_from_object(self):
+        # Inheritance from object is specifically allowed, unlike other nominal classes
+        class P(Protocol, object):
+            x: int
+
+        self.assertEqual(typing.get_protocol_members(P), {'x'})
+
+        class OldGeneric(Protocol, Generic[T], object):
+            y: T
+
+        self.assertEqual(typing.get_protocol_members(OldGeneric), {'y'})
+
+        class NewGeneric[T](Protocol, object):
+            z: T
+
+        self.assertEqual(typing.get_protocol_members(NewGeneric), {'z'})
+
     def test_no_instantiation(self):
         class P(Protocol): pass