commit 4194f1465fa85371dcbead57a54bb06d1f0b97d9
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Wed Jul 21 17:23:21 2021 -0700
committer GitHub <noreply@github.com> Wed Jul 21 19:23:21 2021 -0500
tree 2b5d1054f052db9fa8da96c97c1697ce45d562b9
parent d17449f31d4af7a735e81b587bb329481764412f

bpo-44704: Make Set._hash consistent with frozenset.__hash__ (GH-27281) (GH-27282)

Lib/test/test_collections.py

diff --git a/Lib/test/test_collections.py b/Lib/test/test_collections.py
index f98048b..1f659d7 100644
--- a/Lib/test/test_collections.py
+++ b/Lib/test/test_collections.py
@@ -1801,6 +1801,18 @@ def __repr__(self):
         self.assertTrue(f1 != l1)
         self.assertTrue(f1 != l2)
 
+    def test_Set_hash_matches_frozenset(self):
+        sets = [
+            {}, {1}, {None}, {-1}, {0.0}, {"abc"}, {1, 2, 3},
+            {10**100, 10**101}, {"a", "b", "ab", ""}, {False, True},
+            {object(), object(), object()}, {float("nan")},  {frozenset()},
+            {*range(1000)}, {*range(1000)} - {100, 200, 300},
+            {*range(sys.maxsize - 10, sys.maxsize + 10)},
+        ]
+        for s in sets:
+            fs = frozenset(s)
+            self.assertEqual(hash(fs), Set._hash(fs), msg=s)
+
     def test_Mapping(self):
         for sample in [dict]:
             self.assertIsInstance(sample(), Mapping)