From 96074de573f82fc66a2bd73c36905141a3f1d5c1 Mon Sep 17 00:00:00 2001
From: Pablo Galindo <Pablogsal@gmail.com>
Date: Tue, 5 May 2020 22:58:19 +0100
Subject: bpo-40523: Add pass-throughs for hash() and reversed() to
 weakref.proxy objects (GH-19946)

---
 Lib/test/test_weakref.py | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'Lib/test/test_weakref.py')

diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py
index 563507fee3..56a42f055d 100644
--- a/Lib/test/test_weakref.py
+++ b/Lib/test/test_weakref.py
@@ -411,6 +411,26 @@ class ReferencesTestCase(TestBase):
             # can be killed in the middle of the call
             "blech" in p
 
+    def test_proxy_reversed(self):
+        class MyObj:
+            def __len__(self):
+                return 3
+            def __reversed__(self):
+                return iter('cba')
+
+        obj = MyObj()
+        self.assertEqual("".join(reversed(weakref.proxy(obj))), "cba")
+
+    def test_proxy_hash(self):
+        cool_hash = 299_792_458
+
+        class MyObj:
+            def __hash__(self):
+                return cool_hash
+
+        obj = MyObj()
+        self.assertEqual(hash(weakref.proxy(obj)), cool_hash)
+
     def test_getweakrefcount(self):
         o = C()
         ref1 = weakref.ref(o)
-- 
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