@Override
    public Set<String> getClusterList(String topic) throws RemotingConnectException, RemotingSendRequestException,
        RemotingTimeoutException, MQClientException, InterruptedException {
        return this.defaultMQAdminExtImpl.getClusterList(topic);
    }
@Test
    public void testGetClusterList() throws InterruptedException, RemotingTimeoutException, MQClientException, RemotingSendRequestException, RemotingConnectException {
        Set<String> clusterlist = defaultMQAdminExt.getClusterList("UnitTest");
        assertThat(clusterlist.contains("default-cluster-one")).isTrue();
        assertThat(clusterlist.contains("default-cluster-two")).isTrue();
    }