    @Test
    public void testDoSelectToHolder() {

        generate(3, new int[] {2, 3, 5}, new int[] {3, 4, 5});
        List<Referer<IHello>> list = new ArrayList<Referer<IHello>>();
        balance.doSelectToHolder(new DefaultRequest(), list);
        assertTrue(list.size() > 0 && list.size() <= ConfigurableWeightLoadBalance.MAX_REFERER_COUNT);

    }