@Private
  public HistoryClientService getClientService() {
    return this.clientService;
  }
@Test (timeout= 50000 )
  public void testReports() throws Exception {
    Configuration config = new Configuration();
    config
            .setClass(
                    CommonConfigurationKeysPublic.NET_TOPOLOGY_NODE_SWITCH_MAPPING_IMPL_KEY,
                    MyResolver.class, DNSToSwitchMapping.class);

    RackResolver.init(config);
    MRApp app = new MRAppWithHistory(1, 1, true, this.getClass().getName(),
            true);
    app.submit(config);
    Job job = app.getContext().getAllJobs().values().iterator().next();
    app.waitForState(job, JobState.SUCCEEDED);

    historyServer = new JobHistoryServer();

    historyServer.init(config);
    historyServer.start();
    
    // search JobHistory  service
    JobHistory jobHistory= null;
    for (Service service : historyServer.getServices() ) {
      if (service instanceof JobHistory) {
        jobHistory = (JobHistory) service;
      }
    };
    
    Map<JobId, Job> jobs= jobHistory.getAllJobs();
    
    assertEquals(1, jobs.size());
    assertEquals("job_0_0000",jobs.keySet().iterator().next().toString());
    
    Task task = job.getTasks().values().iterator().next();
    TaskAttempt attempt = task.getAttempts().values().iterator().next();

    HistoryClientService historyService = historyServer.getClientService();
    MRClientProtocol protocol = historyService.getClientHandler();

    GetTaskAttemptReportRequest gtarRequest = recordFactory
            .newRecordInstance(GetTaskAttemptReportRequest.class);
    // test getTaskAttemptReport
    TaskAttemptId taId = attempt.getID();
    taId.setTaskId(task.getID());
    taId.getTaskId().setJobId(job.getID());
    gtarRequest.setTaskAttemptId(taId);
    GetTaskAttemptReportResponse response = protocol
            .getTaskAttemptReport(gtarRequest);
    assertEquals("container_0_0000_01_000000", response.getTaskAttemptReport()
            .getContainerId().toString());
    assertTrue(response.getTaskAttemptReport().getDiagnosticInfo().isEmpty());
    // counters
    assertNotNull(response.getTaskAttemptReport().getCounters()
            .getCounter(TaskCounter.PHYSICAL_MEMORY_BYTES));
    assertEquals(taId.toString(), response.getTaskAttemptReport()
            .getTaskAttemptId().toString());
    // test getTaskReport
    GetTaskReportRequest request = recordFactory
            .newRecordInstance(GetTaskReportRequest.class);
    TaskId taskId = task.getID();
    taskId.setJobId(job.getID());
    request.setTaskId(taskId);
    GetTaskReportResponse reportResponse = protocol.getTaskReport(request);
    assertEquals("", reportResponse.getTaskReport().getDiagnosticsList()
            .iterator().next());
    // progress
    assertEquals(1.0f, reportResponse.getTaskReport().getProgress(), 0.01);
    // report has corrected taskId
    assertEquals(taskId.toString(), reportResponse.getTaskReport().getTaskId()
            .toString());
    // Task state should be SUCCEEDED
    assertEquals(TaskState.SUCCEEDED, reportResponse.getTaskReport()
            .getTaskState());

    // For invalid jobid, throw IOException
    GetTaskReportsRequest gtreportsRequest =
        recordFactory.newRecordInstance(GetTaskReportsRequest.class);
    gtreportsRequest.setJobId(TypeConverter.toYarn(JobID
        .forName("job_1415730144495_0001")));
    gtreportsRequest.setTaskType(TaskType.REDUCE);
    try {
      protocol.getTaskReports(gtreportsRequest);
      fail("IOException not thrown for invalid job id");
    } catch (IOException e) {
      // Expected
    }

    // test getTaskAttemptCompletionEvents
    GetTaskAttemptCompletionEventsRequest taskAttemptRequest = recordFactory
            .newRecordInstance(GetTaskAttemptCompletionEventsRequest.class);
    taskAttemptRequest.setJobId(job.getID());
    GetTaskAttemptCompletionEventsResponse taskAttemptCompletionEventsResponse = protocol
            .getTaskAttemptCompletionEvents(taskAttemptRequest);
    assertEquals(0, taskAttemptCompletionEventsResponse.getCompletionEventCount());
    
    // test getDiagnostics
    GetDiagnosticsRequest diagnosticRequest = recordFactory
            .newRecordInstance(GetDiagnosticsRequest.class);
    diagnosticRequest.setTaskAttemptId(taId);
    GetDiagnosticsResponse diagnosticResponse = protocol
            .getDiagnostics(diagnosticRequest);
    // it is strange : why one empty string ?
    assertEquals(1, diagnosticResponse.getDiagnosticsCount());
    assertEquals("", diagnosticResponse.getDiagnostics(0));

  }