curds: Don't loop len(1) playlists

We need to check if looping is true, even if length is one, before
setting the current index.

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

curds/playlist/playlist.py

@@ -45,6 +45,8 @@ class Playlist():
         if max == -1:
             return None
         elif max == 0:
+            if self.loop == False and self.current == 0:
+                return None
             self.current = 0
         elif self.random == True:
             self.current = (self.current + random.randint(1, max)) % max

curds/playlist/test_playlist.py

@@ -174,8 +174,12 @@ class TestPlaylist(unittest.TestCase):
         track = tags.Track.lookup(os.path.join(path, "01 - Test Track 01.ogg"))
 
         plist.add(track)
+        self.assertEqual(plist.current, -1)
         self.assertEqual(plist.next(), track)
         self.assertEqual(plist.current, 0)
+        self.assertEqual(plist.next(), None)
+        self.assertEqual(plist.current, 0)
+
         plist.set_loop(True)
         self.assertEqual(plist.next(), track)
         self.assertEqual(plist.current, 0)