core: Update title distinct name to track

mopidy/core/library.py

@@ -85,7 +85,7 @@ class LibraryController(object):
         protocol supports in a more sane fashion. Other frontends are not
         recommended to use this method.
 
-        :param string field: One of ``title``, ``artist``, ``albumartist``,
+        :param string field: One of ``track``, ``artist``, ``albumartist``,
             ``album``, ``composer``, ``performer``, ``date``or ``genre``.
         :param dict query: Query to use for limiting results, see
             :meth:`search` for details about the query format.

mopidy/local/json.py

@@ -141,7 +141,7 @@ class JsonLibrary(local.Library):
             return []
 
     def get_distinct(self, field, query=None):
-        if field == 'title':
+        if field == 'track':
             def distinct(track):
                 return {track.name}
         elif field == 'artist':

mopidy/mpd/protocol/music_db.py

@@ -22,7 +22,7 @@ _SEARCH_MAPPING = {
     'track': 'track_no'}
 
 _LIST_MAPPING = {
-    'title': 'title',
+    'title': 'track',
     'album': 'album',
     'albumartist': 'albumartist',
     'artist': 'artist',

tests/mpd/protocol/test_music_db.py

@@ -624,6 +624,11 @@ class MusicDatabaseListTest(protocol.BaseTestCase):
         self.send_request('list "foo"')
         self.assertEqualResponse('ACK [2@0] {list} incorrect arguments')
 
+    # Track title
+    def test_list_title(self):
+        self.send_request('list "title"')
+        self.assertInResponse('OK')
+
     # Artist
 
     def test_list_artist_with_quotes(self):