1 files changed, 53 insertions, 0 deletions
diff --git a/t/unit/utils/test_objects.py b/t/unit/utils/test_objects.py
new file mode 100644
index 00000000..8b13a405
--- /dev/null
+++ b/t/unit/utils/test_objects.py
@@ -0,0 +1,53 @@
+from __future__ import absolute_import, unicode_literals
+
+from kombu.utils.objects import cached_property
+
+
+class test_cached_property:
+
+    def test_deleting(self):
+
+        class X(object):
+            xx = False
+
+            @cached_property
+            def foo(self):
+                return 42
+
+            @foo.deleter  # noqa
+            def foo(self, value):
+                self.xx = value
+
+        x = X()
+        del(x.foo)
+        assert not x.xx
+        x.__dict__['foo'] = 'here'
+        del(x.foo)
+        assert x.xx == 'here'
+
+    def test_when_access_from_class(self):
+
+        class X(object):
+            xx = None
+
+            @cached_property
+            def foo(self):
+                return 42
+
+            @foo.setter  # noqa
+            def foo(self, value):
+                self.xx = 10
+
+        desc = X.__dict__['foo']
+        assert X.foo is desc
+
+        assert desc.__get__(None) is desc
+        assert desc.__set__(None, 1) is desc
+        assert desc.__delete__(None) is desc
+        assert desc.setter(1)
+
+        x = X()
+        x.foo = 30
+        assert x.xx == 10
+
+        del(x.foo)