Make audioservice load backends without callback

mycroft/audio/audioservice.py

@@ -208,13 +208,13 @@ def __init__(self, bus):
         self.volume_is_low = False
 
         self._loaded = MonotonicEvent()
-        bus.once('open', self.load_services_callback)
+        self.load_services()
 
-    def load_services_callback(self):
-        """
-            Main callback function for loading services. Sets up the globals
-            service and default and registers the event handlers for the
-            subsystem.
+    def load_services(self):
+        """Method for loading services.
+
+        Sets up the global service, default and registers the event handlers
+        for the subsystem.
         """
         services = load_services(self.config, self.bus)
         # Sort services so local services are checked first

test/unittests/audio/test_service.py

@@ -75,7 +75,7 @@ def test_audio_backend_shutdown(self, mock_load_services):
         backend, second_backend = setup_mock_backends(mock_load_services,
                                                       self.emitter)
         service = audio_service.AudioService(self.emitter)
-        service.load_services_callback()
+        service.load_services()
 
         service.default = backend
 
@@ -91,7 +91,7 @@ def test_audio_service_track_start(self, mock_load_services):
         backend, second_backend = setup_mock_backends(mock_load_services,
                                                       self.emitter)
         service = audio_service.AudioService(self.emitter)
-        service.load_services_callback()
+        service.load_services()
         service.default = backend
 
         self.emitter.reset()
@@ -112,7 +112,7 @@ def test_audio_service_methods_not_playing(self, mock_load_services):
         mock_load_services.return_value = [backend, second_backend]
 
         service = audio_service.AudioService(self.emitter)
-        service.load_services_callback()
+        service.load_services()
 
         service.default = backend
 
@@ -145,7 +145,7 @@ def test_audio_service_methods_playing(self, mock_load_services):
         mock_load_services.return_value = [backend, second_backend]
 
         service = audio_service.AudioService(self.emitter)
-        service.load_services_callback()
+        service.load_services()
 
         service.default = backend
 
@@ -207,7 +207,7 @@ def test_audio_service_queue_methods(self, mock_load_services):
         mock_load_services.return_value = [backend, second_backend]
 
         service = audio_service.AudioService(self.emitter)
-        service.load_services_callback()
+        service.load_services()
 
         service.default = backend