'Test cover supported features.'

def test_supported_features(self):

    state = self.hass.states.get('cover.garage_door')
    self.assertEqual(3, state.attributes.get('supported_features'))
    state = self.hass.states.get('cover.kitchen_window')
    self.assertEqual(11, state.attributes.get('supported_features'))
    state = self.hass.states.get('cover.hall_window')
    self.assertEqual(15, state.attributes.get('supported_features'))
    state = self.hass.states.get('cover.living_room_window')
    self.assertEqual(255, state.attributes.get('supported_features'))
