New group logging

unit_tests/test_events_forwarder.py

@@ -31,7 +31,11 @@ classes = load_classes(TOOLBOX / 'eventsforwarder.py', {
 
 class ForwarderTests(unittest.TestCase):
     def setUp(self):
-        self.owner = Mock()
+        # Do not fabricate optional API methods such as log_group on lookup.
+        self.owner = Mock(spec=[
+            'entity_exists', 'get_state', 'log', 'log_info', 'log_warning',
+            'log_error', 'fire_event', 'call_service',
+        ])
         self.states = {'media_player.bravia_theatre': 'off',
                        'binary_sensor.is_tv_on': 'off'}
         self.owner.entity_exists.side_effect = lambda entity: entity in self.states