add command to retrieve list of composite modes

voctocore/lib/commands.py

@@ -147,6 +147,12 @@ def get_composite_mode(self):
         status = self._get_composite_status()
         return OkResponse('composite_mode', status)
 
+    def get_composite_modes(self):
+        """lists the names of all available composite-mode"""
+        names = [mode.name for mode in CompositeModes]
+        namestr = ','.join(names)
+        return OkResponse('composite_modes', namestr)
+
     def get_composite_mode_and_video_status(self):
         """retrieves the composite-mode and the video-status
         in a single call"""

voctocore/tests/commands/test_get_composite_modes.py

@@ -0,0 +1,13 @@
+from lib.response import OkResponse
+from tests.commands.commands_test_base import CommandsTestBase
+
+
+class GetCompositeModesTest(CommandsTestBase):
+    def test_get_composite_modes(self):
+        response = self.commands.get_composite_modes()
+
+        self.assertIsInstance(response, OkResponse)
+        self.assertEqual(response.args, (
+            'composite_modes',
+            'fullscreen,side_by_side_equal,side_by_side_preview,picture_in_picture'
+        ))