audio: Give the BassPlayer a bus property

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

audio/bass.py

@@ -9,3 +9,9 @@ class BassPlayer(GObject.GObject):
         self.playbin = Gst.ElementFactory.make("playbin")
         self.playbin.set_property("video-sink", self.video)
         self.playbin.set_state(Gst.State.READY)
+
+        self.bus.add_signal_watch()
+
+    @GObject.Property
+    def bus(self):
+        return self.playbin.get_bus()

audio/player.py

@@ -15,8 +15,6 @@ class Player(bass.BassPlayer):
         bass.BassPlayer.__init__(self)
         self.Autopause = scale.AutoPauseScale()
 
-        self.bus = self.playbin.get_bus()
-        self.bus.add_signal_watch()
         self.bus.connect("message::eos", self.next)
         self.bus.connect("message::state-changed", self.on_state_changed)
         self.bus.connect("message::tag", self.on_tag)

audio/test_bass.py

@@ -13,3 +13,7 @@ class TestBassPlayer(unittest.TestCase):
         self.assertEqual(base.playbin.get_property("video-sink"), base.video)
         self.assertEqual(base.playbin.get_state(Gst.CLOCK_TIME_NONE)[1],
                          Gst.State.READY)
+
+    def test_bass_player_bus(self):
+        base = bass.BassPlayer()
+        self.assertIsInstance(base.bus, Gst.Bus)