Fix ~200 backend tests

docs/development/contributing.rst

@@ -74,11 +74,11 @@ Running tests
 To run tests, you need a couple of dependencies. They can be installed through
 Debian/Ubuntu package management::
 
-    sudo aptitude install python-coverage python-nose
+    sudo aptitude install python-coverage python-mock python-nose
 
 Or, they can be installed using ``pip``::
 
-    sudo pip install -r requirements-tests.txt
+    sudo pip install -r requirements/tests.txt
 
 Then, to run all tests, go to the project directory and run::
 

mopidy/backends/local/__init__.py

@@ -5,6 +5,7 @@ import os
 import shutil
 
 from pykka.actor import ThreadingActor
+from pykka.registry import ActorRegistry
 
 from mopidy import settings
 from mopidy.backends.base import (Backend, CurrentPlaylistController,
@@ -12,6 +13,7 @@ from mopidy.backends.base import (Backend, CurrentPlaylistController,
     BasePlaybackProvider, StoredPlaylistsController,
     BaseStoredPlaylistsProvider)
 from mopidy.models import Playlist, Track, Album
+from mopidy.outputs.base import BaseOutput
 
 from .translator import parse_m3u, parse_mpd_tag_cache
 
@@ -49,6 +51,13 @@ class LocalBackend(ThreadingActor, Backend):
 
         self.uri_handlers = [u'file://']
 
+        self.output = None
+
+    def post_start(self):
+        output_refs = ActorRegistry.get_by_class(BaseOutput)
+        assert len(output_refs) == 1, 'Expected exactly one running output.'
+        self.output = output_refs[0].proxy()
+
 
 class LocalPlaybackController(PlaybackController):
     def __init__(self, *args, **kwargs):

mopidy/outputs/dummy.py

@@ -1,6 +1,8 @@
+from pykka.actor import ThreadingActor
+
 from mopidy.outputs.base import BaseOutput
 
-class DummyOutput(BaseOutput):
+class DummyOutput(ThreadingActor, BaseOutput):
     """
     Audio output used for testing.
     """

requirements/tests.txt

@@ -1,2 +1,3 @@
 coverage
+mock
 nose

tests/backends/base/current_playlist.py

@@ -1,9 +1,9 @@
+import mock
 import multiprocessing
 import random
 
-from mopidy.mixers.dummy import DummyMixer
 from mopidy.models import Playlist, Track
-from mopidy.outputs.dummy import DummyOutput
+from mopidy.outputs.base import BaseOutput
 
 from tests.backends.base import populate_playlist
 
@@ -11,19 +11,13 @@ class CurrentPlaylistControllerTest(object):
     tracks = []
 
     def setUp(self):
-        self.core_queue = multiprocessing.Queue()
-        self.output = DummyOutput(self.core_queue)
-        self.backend = self.backend_class(
-            self.core_queue, self.output, DummyMixer)
+        self.backend = self.backend_class()
+        self.backend.output = mock.Mock(spec=BaseOutput)
         self.controller = self.backend.current_playlist
         self.playback = self.backend.playback
 
         assert len(self.tracks) == 3, 'Need three tracks to run tests.'
 
-    def tearDown(self):
-        self.backend.destroy()
-        self.output.destroy()
-
     def test_add(self):
         for track in self.tracks:
             cp_track = self.controller.add(track)

tests/backends/base/library.py

@@ -1,4 +1,3 @@
-from mopidy.mixers.dummy import DummyMixer
 from mopidy.models import Playlist, Track, Album, Artist
 
 from tests import SkipTest, data_folder
@@ -15,12 +14,9 @@ class LibraryControllerTest(object):
         Track()]
 
     def setUp(self):
-        self.backend = self.backend_class(mixer_class=DummyMixer)
+        self.backend = self.backend_class()
         self.library = self.backend.library
 
-    def tearDown(self):
-        self.backend.destroy()
-
     def test_refresh(self):
         self.library.refresh()
 

tests/backends/base/playback.py

@@ -1,10 +1,10 @@
+import mock
 import multiprocessing
 import random
 import time
 
-from mopidy.mixers.dummy import DummyMixer
 from mopidy.models import Track
-from mopidy.outputs.dummy import DummyOutput
+from mopidy.outputs.base import BaseOutput
 
 from tests import SkipTest
 from tests.backends.base import populate_playlist
@@ -15,10 +15,8 @@ class PlaybackControllerTest(object):
     tracks = []
 
     def setUp(self):
-        self.core_queue = multiprocessing.Queue()
-        self.output = DummyOutput(self.core_queue)
-        self.backend = self.backend_class(
-            self.core_queue, self.output, DummyMixer)
+        self.backend = self.backend_class()
+        self.backend.output = mock.Mock(spec=BaseOutput)
         self.playback = self.backend.playback
         self.current_playlist = self.backend.current_playlist
 
@@ -27,10 +25,6 @@ class PlaybackControllerTest(object):
         assert self.tracks[0].length >= 2000, \
             'First song needs to be at least 2000 miliseconds'
 
-    def tearDown(self):
-        self.backend.destroy()
-        self.output.destroy()
-
     def test_initial_state_is_stopped(self):
         self.assertEqual(self.playback.state, self.playback.STOPPED)
 
@@ -733,10 +727,12 @@ class PlaybackControllerTest(object):
         self.assertEqual(self.playback.stop(), None)
 
     def test_time_position_when_stopped(self):
+        self.backend.output.get_position = mock.Mock(return_value=0)
         self.assertEqual(self.playback.time_position, 0)
 
     @populate_playlist
     def test_time_position_when_stopped_with_playlist(self):
+        self.backend.output.get_position = mock.Mock(return_value=0)
         self.assertEqual(self.playback.time_position, 0)
 
     @SkipTest # Uses sleep and does not work with LocalBackend+DummyOutput

tests/backends/base/stored_playlists.py

@@ -3,7 +3,6 @@ import shutil
 import tempfile
 
 from mopidy import settings
-from mopidy.mixers.dummy import DummyMixer
 from mopidy.models import Playlist
 
 from tests import SkipTest, data_folder
@@ -14,12 +13,10 @@ class StoredPlaylistsControllerTest(object):
         settings.LOCAL_TAG_CACHE_FILE = data_folder('library_tag_cache')
         settings.LOCAL_MUSIC_PATH = data_folder('')
 
-        self.backend = self.backend_class(mixer_class=DummyMixer)
+        self.backend = self.backend_class()
         self.stored  = self.backend.stored_playlists
 
     def tearDown(self):
-        self.backend.destroy()
-
         if os.path.exists(settings.LOCAL_PLAYLIST_PATH):
             shutil.rmtree(settings.LOCAL_PLAYLIST_PATH)
 

tests/backends/local/stored_playlists_test.py

@@ -70,8 +70,7 @@ class LocalStoredPlaylistsControllerTest(StoredPlaylistsControllerTest,
 
         self.stored.save(playlist)
 
-        self.backend.destroy()
-        self.backend = self.backend_class(mixer_class=DummyMixer)
+        self.backend = self.backend_class()
         self.stored = self.backend.stored_playlists
 
         self.assert_(self.stored.playlists)