@Override
  public List<PrivilegedOperation> postComplete(ContainerId containerId)
      throws ResourceHandlerException {
    cGroupsHandler.deleteCGroup(CGroupsHandler.CGroupController.BLKIO,
        containerId.toString());
    return null;
  }
@Test
  public void testPostComplete() throws Exception {
    String id = "container_01_01";
    ContainerId mockContainerId = mock(ContainerId.class);
    when(mockContainerId.toString()).thenReturn(id);
    Assert.assertNull(cGroupsBlkioResourceHandlerImpl
        .postComplete(mockContainerId));
    verify(mockCGroupsHandler, times(1)).deleteCGroup(
        CGroupsHandler.CGroupController.BLKIO, id);
  }