fs = mock(FileSystem.class);
when(fs.delete(any(Path.class),anyBoolean())).thenReturn(true);
String user = UserGroupInformation.getCurrentUser().getShortUserName();
Path stagingDir = MRApps.getStagingAreaDir(conf, user);
when(fs.exists(stagingDir)).thenReturn(true);
ApplicationId appId = ApplicationId.newInstance(System.currentTimeMillis(),
0);
ApplicationAttemptId attemptId = ApplicationAttemptId.newInstance(appId, 1);
ContainerAllocator mockAlloc = mock(ContainerAllocator.class);
MRAppMaster appMaster = new TestMRApp(attemptId, mockAlloc,
JobStateInternal.REBOOT, 1); //no retry