Issue #24286: Register dict views with the MappingView ABCs.
diff --git a/Lib/test/test_dictviews.py b/Lib/test/test_dictviews.py
index 30cfb93..c5d3917 100644
--- a/Lib/test/test_dictviews.py
+++ b/Lib/test/test_dictviews.py
@@ -1,4 +1,5 @@
import unittest
+import collections
from test import test_support
class DictSetTest(unittest.TestCase):
@@ -164,7 +165,26 @@
d[42] = d.viewvalues()
self.assertRaises(RuntimeError, repr, d)
+ def test_abc_registry(self):
+ d = dict(a=1)
+ self.assertIsInstance(d.viewkeys(), collections.KeysView)
+ self.assertIsInstance(d.viewkeys(), collections.MappingView)
+ self.assertIsInstance(d.viewkeys(), collections.Set)
+ self.assertIsInstance(d.viewkeys(), collections.Sized)
+ self.assertIsInstance(d.viewkeys(), collections.Iterable)
+ self.assertIsInstance(d.viewkeys(), collections.Container)
+
+ self.assertIsInstance(d.viewvalues(), collections.ValuesView)
+ self.assertIsInstance(d.viewvalues(), collections.MappingView)
+ self.assertIsInstance(d.viewvalues(), collections.Sized)
+
+ self.assertIsInstance(d.viewitems(), collections.ItemsView)
+ self.assertIsInstance(d.viewitems(), collections.MappingView)
+ self.assertIsInstance(d.viewitems(), collections.Set)
+ self.assertIsInstance(d.viewitems(), collections.Sized)
+ self.assertIsInstance(d.viewitems(), collections.Iterable)
+ self.assertIsInstance(d.viewitems(), collections.Container)
def test_main():