Issue #6149: Fix initialization of WeakValueDictionary objects from non-empty parameters.

1 files changed, 11 insertions, 0 deletions

diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py
index 9821e1ba75..049dba2110 100644
--- a/Lib/test/test_weakref.py
+++ b/Lib/test/test_weakref.py
@@ -942,6 +942,17 @@ class MappingTestCase(TestBase):
             dict[o] = o.arg
         return dict, objects
 
+    def test_make_weak_valued_dict_from_dict(self):
+        o = Object(3)
+        dict = weakref.WeakValueDictionary({364:o})
+        self.assertEqual(dict[364], o)
+
+    def test_make_weak_valued_dict_from_weak_valued_dict(self):
+        o = Object(3)
+        dict = weakref.WeakValueDictionary({364:o})
+        dict2 = weakref.WeakValueDictionary(dict)
+        self.assertEqual(dict[364], o)
+
     def make_weak_valued_dict(self):
         dict = weakref.WeakValueDictionary()
         objects = list(map(Object, range(self.COUNT)))