### Question:
RouteInfoManager { public byte[] getAllClusterInfo() { ClusterInfo clusterInfoSerializeWrapper = new ClusterInfo(); clusterInfoSerializeWrapper.setBrokerAddrTable(this.brokerAddrTable); clusterInfoSerializeWrapper.setClusterAddrTable(this.clusterAddrTable); return clusterInfoSerializeWrapper.encode(); } RouteInfoManager(); byte[] getAllClusterInfo(); void deleteTopic(final String topic); byte[] getAllTopicList(); RegisterBrokerResult registerBroker(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId,
        final String haServerAddr,
        final TopicConfigSerializeWrapper topicConfigWrapper,
        final List<String> filterServerList,
        final Channel channel); int wipeWritePermOfBrokerByLock(final String brokerName); @SuppressWarnings("SpellCheckingInspection") void unregisterBroker(
        final String clusterName,
        final String brokerAddr,
        final String brokerName,
        final long brokerId); TopicRouteData pickupTopicRouteData(final String topic); void scanNotActiveBroker(); void onChannelDestroy(String remoteAddr, Channel channel); void printAllPeriodically(); byte[] getSystemTopicList(); byte[] getTopicsByCluster(String cluster); byte[] getUnitTopics(); byte[] getHasUnitSubTopicList(); byte[] getHasUnitSubUnUnitTopicList();  }### Answer:
@Test public void testGetAllClusterInfo() { byte[] clusterInfo = routeInfoManager.getAllClusterInfo(); assertThat(clusterInfo).isNotNull(); }