core: Forward {volume,mute}_changed events, don't trigger them ourselves

mopidy/core/actor.py

@@ -5,7 +5,7 @@ import itertools
 
 import pykka
 
-from mopidy import audio, backend
+from mopidy import audio, backend, mixer
 from mopidy.audio import PlaybackState
 from mopidy.core.library import LibraryController
 from mopidy.core.listener import CoreListener
@@ -15,7 +15,10 @@ from mopidy.core.tracklist import TracklistController
 from mopidy.utils import versioning
 
 
-class Core(pykka.ThreadingActor, audio.AudioListener, backend.BackendListener):
+class Core(
+        pykka.ThreadingActor, audio.AudioListener, backend.BackendListener,
+        mixer.MixerListener):
+
     library = None
     """The library controller. An instance of
     :class:`mopidy.core.LibraryController`."""
@@ -81,6 +84,14 @@ class Core(pykka.ThreadingActor, audio.AudioListener, backend.BackendListener):
         # Forward event from backend to frontends
         CoreListener.send('playlists_loaded')
 
+    def volume_changed(self, volume):
+        # Forward event from mixer to frontends
+        CoreListener.send('volume_changed', volume=volume)
+
+    def mute_changed(self, muted):
+        # Forward event from mixer to frontends
+        CoreListener.send('mute_changed', mute=muted)
+
 
 class Backends(list):
     def __init__(self, backends):

mopidy/core/listener.py

@@ -150,6 +150,7 @@ class CoreListener(listener.Listener):
         :param mute: the new mute state
         :type mute: boolean
         """
+        # TODO Change 'mute' arg to 'muted' next time we break this API
         pass
 
     def seeked(self, time_position):

mopidy/core/playback.py

@@ -101,8 +101,6 @@ class PlaybackController(object):
             # For testing
             self._volume = volume
 
-        self._trigger_volume_changed(volume)
-
     volume = property(get_volume, set_volume)
     """Volume as int in range [0..100] or :class:`None`"""
 
@@ -121,8 +119,6 @@ class PlaybackController(object):
             # For testing
             self._mute = value
 
-        self._trigger_mute_changed(value)
-
     mute = property(get_mute, set_mute)
     """Mute state as a :class:`True` if muted, :class:`False` otherwise"""
 
@@ -351,14 +347,6 @@ class PlaybackController(object):
             'playback_state_changed',
             old_state=old_state, new_state=new_state)
 
-    def _trigger_volume_changed(self, volume):
-        logger.debug('Triggering volume changed event')
-        listener.CoreListener.send('volume_changed', volume=volume)
-
-    def _trigger_mute_changed(self, mute):
-        logger.debug('Triggering mute changed event')
-        listener.CoreListener.send('mute_changed', mute=mute)
-
     def _trigger_seeked(self, time_position):
         logger.debug('Triggering seeked event')
         listener.CoreListener.send('seeked', time_position=time_position)

tests/core/test_events.py

@@ -20,11 +20,23 @@ class BackendEventsTest(unittest.TestCase):
     def tearDown(self):
         pykka.ActorRegistry.stop_all()
 
-    def test_backends_playlists_loaded_forwards_event_to_frontends(self, send):
+    def test_forwards_backend_playlists_loaded_event_to_frontends(self, send):
         self.core.playlists_loaded().get()
 
         self.assertEqual(send.call_args[0][0], 'playlists_loaded')
 
+    def test_forwards_mixer_volume_changed_event_to_frontends(self, send):
+        self.core.volume_changed(volume=60).get()
+
+        self.assertEqual(send.call_args[0][0], 'volume_changed')
+        self.assertEqual(send.call_args[1]['volume'], 60)
+
+    def test_forwards_mixer_mute_changed_event_to_frontends(self, send):
+        self.core.mute_changed(muted=True).get()
+
+        self.assertEqual(send.call_args[0][0], 'mute_changed')
+        self.assertEqual(send.call_args[1]['mute'], True)
+
     def test_tracklist_add_sends_tracklist_changed_event(self, send):
         send.reset_mock()
 

tests/core/test_playback.py

@@ -376,17 +376,16 @@ class CorePlaybackTest(unittest.TestCase):
 
     # TODO Test on_tracklist_change
 
-    # TODO Test volume
+    def test_volume(self):
+        self.assertEqual(self.core.playback.volume, None)
 
-    @mock.patch(
-        'mopidy.core.playback.listener.CoreListener', spec=core.CoreListener)
-    def test_set_volume_emits_volume_changed_event(self, listener_mock):
-        self.core.playback.set_volume(10)
-        listener_mock.reset_mock()
+        self.core.playback.volume = 30
 
-        self.core.playback.set_volume(20)
+        self.assertEqual(self.core.playback.volume, 30)
 
-        listener_mock.send.assert_called_once_with('volume_changed', volume=20)
+        self.core.playback.volume = 70
+
+        self.assertEqual(self.core.playback.volume, 70)
 
     def test_mute(self):
         self.assertEqual(self.core.playback.mute, False)