'Test the processing of zone events with missing zones.'

@mock.patch.object(nx584.NX584ZoneSensor, 'schedule_update_ha_state')
def test_process_zone_event_missing_zone(self, mock_update):

    watcher = nx584.NX584Watcher(None, {})
    watcher._process_zone_event({'zone': 1, 'zone_state': False})
    self.assertFalse(mock_update.called)
