Allow omitted owner in proxy descriptor binding

src/wrapt/proxies.py

@@ -70,7 +70,7 @@ def __wrapper_await__(self):
     return (yield from self.__wrapped__.__await__())
 
 
-def __wrapper_get__(self, instance, owner):
+def __wrapper_get__(self, instance, owner=None):
     return self.__wrapped__.__get__(instance, owner)
 
 

tests/core/test_auto_object_proxy.py

@@ -169,6 +169,24 @@ def test_fspath_not_pathlike(self):
         self.assertRaises(TypeError, os.fspath, proxy)
         self.assertFalse(isinstance(proxy, os.PathLike))
 
+    def test_descriptor_optional_owner(self):
+        def method(instance):
+            return instance
+
+        instance = object()
+
+        for descriptor in (method, property(method)):
+            with self.subTest(descriptor=descriptor):
+                proxy = wrapt.AutoObjectProxy(descriptor)
+
+                self.assertEqual(proxy.__get__(instance), descriptor.__get__(instance))
+                self.assertEqual(
+                    proxy.__get__(instance, None), descriptor.__get__(instance, None)
+                )
+                self.assertEqual(
+                    proxy.__get__(None, object), descriptor.__get__(None, object)
+                )
+
     def test_descriptor(self):
         class Descriptor:
             def __init__(self, value):

tests/core/test_lazy_object_proxy.py

@@ -22,6 +22,26 @@ def factory():
         self.assertEqual(int(proxy), 42)
         self.assertEqual(status["created"], 1)
 
+    def test_descriptor_optional_owner(self):
+        def method(instance):
+            return instance
+
+        instance = object()
+
+        for descriptor in (method, property(method)):
+            with self.subTest(descriptor=descriptor):
+                proxy = wrapt.LazyObjectProxy(
+                    lambda: descriptor, interface=type(descriptor)
+                )
+
+                self.assertEqual(proxy.__get__(instance), descriptor.__get__(instance))
+                self.assertEqual(
+                    proxy.__get__(instance, None), descriptor.__get__(instance, None)
+                )
+                self.assertEqual(
+                    proxy.__get__(None, object), descriptor.__get__(None, object)
+                )
+
     def test_lazy_import(self):
         if "sched" in sys.modules:
             del sys.modules["sched"]