fix(test): basic playlist init

tests/test_domain.py

@@ -88,9 +88,9 @@ class TestDomain(unittest.TestCase):
 
         pl = Playlist(1, "some description")
 
-        pl.id: 333
-        pl.timeslot: Timeslot()
-        pl.type: PlaylistType.TIMESLOT
+        pl.id = 333
+        pl.timeslot = Timeslot(1, None, 123, 456, None, None)
+        pl.type = PlaylistType.TIMESLOT
 
     def test_assign_playlists_to_timeslot(self):
         print(self._testMethodName)