Add weak reference test for callback manager

Adds a unit test to make sure the callback manager can
have weakly referenced functions as callbacks.

Change-Id: Ic811e8fe63bcde2d89cdb39f9a641cde1ebd9ddb

diff --git a/neutron/tests/unit/callbacks/test_manager.py b/neutron/tests/unit/callbacks/test_manager.py
index 1a4b4090dcfafb8d8c61202fc36d1a58e22d8109..e4e64323d55bc8edab72885b9e90545de562278c 100644 (file)
--- a/neutron/tests/unit/callbacks/test_manager.py
+++ b/neutron/tests/unit/callbacks/test_manager.py
@@ -142,6 +142,11 @@ class CallBacksManagerTestCase(base.BaseTestCase):
         self.assertEqual(0, callback_1.counter)
         self.assertEqual(0, callback_2.counter)
 
+    def test_feebly_referenced_callback(self):
+        self.manager.subscribe(lambda *x, **y: None, resources.PORT,
+                               events.BEFORE_CREATE)
+        self.manager.notify(resources.PORT, events.BEFORE_CREATE, mock.ANY)
+
     def test_notify_with_exception(self):
         with mock.patch.object(self.manager, '_notify_loop') as n:
             n.return_value = ['error']