From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Wed, 16 Apr 2025 15:21:27 +0000 (-0700)
Subject: typing: Add missing test case for Protocol inheritance (#132597)
X-Git-Tag: v3.14.0b1~451
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72da4a445867648ee668bfc68a9bb659dfebe658;p=thirdparty%2FPython%2Fcpython.git

typing: Add missing test case for Protocol inheritance (#132597)
---

diff --git a/Lib/test/test_typing.py b/Lib/test/test_typing.py
index 5b05ebe87020..32f12a3f8b22 100644
--- a/Lib/test/test_typing.py
+++ b/Lib/test/test_typing.py
@@ -2933,6 +2933,23 @@ 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