### Question:
ResetOffsetByTimeOldCommand implements SubCommand { @Override public void execute(CommandLine commandLine, Options options, RPCHook rpcHook) { DefaultMQAdminExt defaultMQAdminExt = new DefaultMQAdminExt(rpcHook); defaultMQAdminExt.setInstanceName(Long.toString(System.currentTimeMillis())); try { String consumerGroup = commandLine.getOptionValue("g").trim(); String topic = commandLine.getOptionValue("t").trim(); String timeStampStr = commandLine.getOptionValue("s").trim(); long timestamp = 0; try { timestamp = Long.parseLong(timeStampStr); } catch (NumberFormatException e) { Date date = UtilAll.parseDate(timeStampStr, UtilAll.YYYY_MM_DD_HH_MM_SS_SSS); if (date != null) { timestamp = UtilAll.parseDate(timeStampStr, UtilAll.YYYY_MM_DD_HH_MM_SS_SSS).getTime(); } else { System.out.printf("specified timestamp invalid.%n"); return; } boolean force = true; if (commandLine.hasOption('f')) { force = Boolean.valueOf(commandLine.getOptionValue("f").trim()); } defaultMQAdminExt.start(); resetOffset(defaultMQAdminExt, consumerGroup, topic, timestamp, force, timeStampStr); } } catch (Exception e) { e.printStackTrace(); } finally { defaultMQAdminExt.shutdown(); } }  static void resetOffset(DefaultMQAdminExt defaultMQAdminExt, String consumerGroup, String topic, long timestamp, boolean force,
        String timeStampStr); @Override String commandName(); @Override String commandDesc(); @Override Options buildCommandlineOptions(Options options); @Override void execute(CommandLine commandLine, Options options, RPCHook rpcHook);  }### Answer:
@Test public void testExecute() { ResetOffsetByTimeOldCommand cmd = new ResetOffsetByTimeOldCommand(); Options options = ServerUtil.buildCommandlineOptions(new Options()); String[] subargs = new String[] {"-g default-group", "-t unit-test", "-s 1412131213231", "-f false"}; final CommandLine commandLine = ServerUtil.parseCmdLine("mqadmin " + cmd.commandName(), subargs, cmd.buildCommandlineOptions(options), new PosixParser()); assertThat(commandLine.getOptionValue('g').trim()).isEqualTo("default-group"); assertThat(commandLine.getOptionValue('t').trim()).isEqualTo("unit-test"); assertThat(commandLine.getOptionValue('s').trim()).isEqualTo("1412131213231"); }