public Long getAvgMergeTime() {
    return avgMergeTime;
  }
@Test(timeout = 10000)
  public void testAverageMergeTime() throws IOException {
    String historyFileName =
        "job_1329348432655_0001-1329348443227-user-Sleep+job-1329348468601-10-1-SUCCEEDED-default.jhist";
    String confFileName =
        "job_1329348432655_0001_conf.xml";
    Configuration conf = new Configuration();
    JobACLsManager jobAclsMgr = new JobACLsManager(conf);
    Path fulleHistoryPath =
        new Path(TestJobHistoryEntities.class.getClassLoader()
            .getResource(historyFileName)
            .getFile());
    Path fullConfPath =
        new Path(TestJobHistoryEntities.class.getClassLoader()
            .getResource(confFileName)
            .getFile());

    HistoryFileInfo info = mock(HistoryFileInfo.class);
    when(info.getConfFile()).thenReturn(fullConfPath);
    when(info.getHistoryFile()).thenReturn(fulleHistoryPath);

    JobId jobId = MRBuilderUtils.newJobId(1329348432655l, 1, 1);
    CompletedJob completedJob =
        new CompletedJob(conf, jobId, fulleHistoryPath, true, "user",
            info, jobAclsMgr);
    JobInfo jobInfo = new JobInfo(completedJob);
    // There are 2 tasks with merge time of 45 and 55 respectively. So average
    // merge time should be 50.
    Assert.assertEquals(50L, jobInfo.getAvgMergeTime().longValue());
  }