Deliver notification info

Created by: stefanoborini

Notification system to communicate to the UI and other entities interested in notification.

force_bdss/tests/test_core_mco_driver.py

 import unittest
+from testfixtures import LogCapture
 
 from force_bdss.mco.events import MCOStartEvent
 from force_bdss.tests import fixtures
@@ -31,6 +32,13 @@ class TestCoreMCODriver(unittest.TestCase):
         )
         driver.application_started()
 
+    def test_stopping(self):
+        driver = CoreMCODriver(
+            application=self.mock_application,
+        )
+        driver.application_started()
+        driver.application_stopping()
+
     def test_listeners(self):
         driver = CoreMCODriver(
             application=self.mock_application,
@@ -41,4 +49,46 @@ class TestCoreMCODriver(unittest.TestCase):
         driver = CoreMCODriver(
             application=self.mock_application,
         )
-        driver.mco.event = MCOStartEvent()
+        listener = driver.listeners[0]
+        mock_deliver = mock.Mock()
+        listener.__dict__["deliver"] = mock_deliver
+        event = MCOStartEvent()
+        driver.mco.event = event
+        self.assertTrue(mock_deliver.call_args[0][0], event)
+
+    def test_listener_initialization_exception(self):
+        driver = CoreMCODriver(
+            application=self.mock_application,
+        )
+        listener = driver.listeners[0]
+        mock_deliver = mock.Mock()
+        listener.__dict__["deliver"] = mock_deliver
+        mock_deliver.side_effect = Exception()
+        with LogCapture() as capture:
+            driver.mco.event = MCOStartEvent()
+            self.assertTrue(mock_deliver.called)
+
+            capture.check(
+                ("force_bdss.core_mco_driver",
+                 "ERROR",
+                 "Exception while delivering to listener "
+                 "NullNotificationListener: "))
+
+    def test_finalize_error(self):
+        driver = CoreMCODriver(
+            application=self.mock_application,
+        )
+        driver.application_started()
+
+        listener = driver.listeners[0]
+        mock_finalize = mock.Mock()
+        listener.__dict__["finalize"] = mock_finalize
+        mock_finalize.side_effect = Exception()
+
+        with LogCapture() as capture:
+            driver.application_stopping()
+            capture.check(
+                ("force_bdss.core_mco_driver",
+                 "ERROR",
+                 "Exception while finalizing listener "
+                 "NullNotificationListener: "))