import org.apache.hadoop.mapreduce.v2.hs.TestJobHistoryEntities; //导入依赖的package包/类
@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);

  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());
}