def METHOD_NAME(self):
    self.set_channel_position(self.c1.id, 2)
    self._refresh_data(self.c1, self.c2, self.c3)
    # expected order: c2, c1, c3
    self.assertEqual(self.c2.order, 1)
    self.assertEqual(self.c1.order, 2)
    self.assertEqual(self.c3.order, 3)