### Question:
UpdateTopicPermSubCommand implements SubCommand { @Override public void execute(final CommandLine commandLine, final Options options, RPCHook rpcHook) throws SubCommandException { DefaultMQAdminExt defaultMQAdminExt = new DefaultMQAdminExt(rpcHook); defaultMQAdminExt.setInstanceName(Long.toString(System.currentTimeMillis())); try { defaultMQAdminExt.start(); TopicConfig topicConfig = new TopicConfig(); String topic = commandLine.getOptionValue('t').trim(); TopicRouteData topicRouteData = defaultMQAdminExt.examineTopicRouteInfo(topic); assert topicRouteData != null; List<QueueData> queueDatas = topicRouteData.getQueueDatas(); assert queueDatas != null && queueDatas.size() > 0; QueueData queueData = queueDatas.get(0); topicConfig.setTopicName(topic); topicConfig.setWriteQueueNums(queueData.getWriteQueueNums()); topicConfig.setReadQueueNums(queueData.getReadQueueNums()); topicConfig.setPerm(queueData.getPerm()); topicConfig.setTopicSysFlag(queueData.getTopicSynFlag()); int perm = Integer.parseInt(commandLine.getOptionValue('p').trim()); int oldPerm = topicConfig.getPerm(); if (perm == oldPerm) { System.out.printf("new perm equals to the old one!%n"); return; } topicConfig.setPerm(perm); if (commandLine.hasOption('b')) { String addr = commandLine.getOptionValue('b').trim(); defaultMQAdminExt.createAndUpdateTopicConfig(addr, topicConfig); System.out.printf("update topic perm from %s to %s in %s success.%n", oldPerm, perm, addr); System.out.printf("%s%n", topicConfig); return; } else if (commandLine.hasOption('c')) { String clusterName = commandLine.getOptionValue('c').trim(); Set<String> masterSet = CommandUtil.fetchMasterAddrByClusterName(defaultMQAdminExt, clusterName); for (String addr : masterSet) { defaultMQAdminExt.createAndUpdateTopicConfig(addr, topicConfig); System.out.printf("update topic perm from %s to %s in %s success.%n", oldPerm, perm, addr); } return; } ServerUtil.printCommandLineHelp("mqadmin " + this.commandName(), options); } catch (Exception e) { throw new SubCommandException(this.getClass().getSimpleName() + " command failed", e); } finally { defaultMQAdminExt.shutdown(); } }  @Override String commandName(); @Override String commandDesc(); @Override Options buildCommandlineOptions(Options options); @Override void execute(final CommandLine commandLine, final Options options, RPCHook rpcHook);  }### Answer:
@Test public void testExecute() { UpdateTopicPermSubCommand cmd = new UpdateTopicPermSubCommand(); Options options = ServerUtil.buildCommandlineOptions(new Options()); String[] subargs = new String[] {"-b 127.0.0.1:10911", "-c default-cluster", "-t unit-test", "-p 6"}; final CommandLine commandLine = ServerUtil.parseCmdLine("mqadmin " + cmd.commandName(), subargs, cmd.buildCommandlineOptions(options), new PosixParser()); assertThat(commandLine.getOptionValue('b').trim()).isEqualTo("127.0.0.1:10911"); assertThat(commandLine.getOptionValue('c').trim()).isEqualTo("default-cluster"); assertThat(commandLine.getOptionValue('t').trim()).isEqualTo("unit-test"); assertThat(commandLine.getOptionValue('p').trim()).isEqualTo("6"); }