Add more tests for previous

mopidy/backends/__init__.py

@@ -157,6 +157,8 @@ class BasePlaybackController(object):
 
     @property
     def previous_track(self):
+        playlist = self.backend.current_playlist.playlist
+
         if self.current_track is None:
             return None
 
@@ -164,8 +166,7 @@ class BasePlaybackController(object):
             return None
 
         try:
-            return self.backend.current_playlist.playlist.tracks[
-                self.playlist_position - 1]
+            return playlist.tracks[self.playlist_position - 1]
         except IndexError:
             return None
 

tests/backends/basetests.py

@@ -301,6 +301,15 @@ class BasePlaybackControllerTest(object):
         self.playback.previous()
         self.assertEqual(self.playback.current_track, tracks[0])
 
+    @populate_playlist
+    def test_previous_more(self):
+        tracks = self.backend.current_playlist.playlist.tracks
+        self.playback.play() # At track 0
+        self.playback.next() # At track 1
+        self.playback.next() # At track 2
+        self.playback.previous() # At track 1
+        self.assertEqual(self.playback.current_track, tracks[1])
+
     @populate_playlist
     def test_previous_triggers_playback(self):
         self.playback.play()
@@ -359,7 +368,16 @@ class BasePlaybackControllerTest(object):
         self.playback.next()
         self.assertEqual(self.playback.previous_track, tracks[0])
 
+    @populate_playlist
     def test_previous_track_after_previous(self):
+        tracks = self.backend.current_playlist.playlist.tracks
+        self.playback.play() # At track 0
+        self.playback.next() # At track 1
+        self.playback.next() # At track 2
+        self.playback.previous() # At track 1
+        self.assertEqual(self.playback.previous_track, tracks[0])
+
+    def test_previous_track_empty_playlist(self):
         raise NotImplementedError
 
     @populate_playlist