curds: Change PlaylistManager.current into a list

I'm going to keep a list of playlists that have been selected so we can
switch playlists automatically when one ends.

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

curds/playlist/manager.py

@@ -92,25 +92,25 @@ class PlaylistManager(PlaylistManagerBase):
         self.append(GenreManager())
         self.append(Placeholder())
         self.append(LibraryManager())
-        self.current = self.lookup("Collection")
+        self.current = [ self.lookup("Collection") ]
         self.track   = None
 
     def next(self):
-        self.track = self.current.next()
+        self.track = self.current[0].next()
         self.lookup("Previous").add(self.track)
         return self.track
 
     def peek(self, n):
-        cur   = self.current.current
+        cur   = self.current[0].current
         state = random.getstate()
         res   = [ ]
 
         for i in range(n):
-            t = self.current.next()
+            t = self.current[0].next()
             if t != None:
                 res.append(t)
 
-        self.current.current = cur
+        self.current[0].current = cur
         random.setstate(state)
         return res
 

curds/playlist/test_manager.py

@@ -54,7 +54,7 @@ class TestPlaylistManager(unittest.TestCase):
         self.assertIsInstance(self.playman.lookup("Library"), manager.PlaylistManagerBase)
         self.assertIsInstance(self.playman.lookup("Library"), list)
 
-        self.assertEqual(self.playman.current, self.playman.lookup("Collection"))
+        self.assertEqual(self.playman.current, [ self.playman.lookup("Collection") ])
         self.assertEqual(self.playman.track,   None)
 
     def test_manager_indexing(self):
@@ -223,3 +223,10 @@ class TestPlaylistManager(unittest.TestCase):
 
         for i in range(5):
             self.assertEqual(self.playman.next(), tracks[i])
+
+    def test_manager_select_playlist(self):
+        clist = self.playman.lookup("Collection")
+        plist = self.playman.lookup("Library").lookup(test_library, allocate=True)
+        library.join()
+
+        self.assertEqual(self.playman.current, [ clist ])