code: @Test public void batchRemoveChildTest(){
    InodeFolder inodeFolder=new InodeFolder("testFolder1",1,0,System.currentTimeMillis());
    InodeFile inodeFile1=new InodeFile("testFile1",2,1,1000,System.currentTimeMillis());
    InodeFile inodeFile2=new InodeFile("testFile2",3,1,1000,System.currentTimeMillis());
    inodeFolder.addChild(2);
    inodeFolder.addChild(3);
    inodeFolder.addChild(4);
    Map<Integer,Inode> testMap=new HashMap<Integer,Inode>(2);
    testMap.put(2,inodeFile1);
    testMap.put(3,inodeFile2);
    Assert.assertEquals(3,inodeFolder.getNumberOfChildren());
    inodeFolder.removeChild("testFile1",testMap);
    Assert.assertEquals(2,inodeFolder.getNumberOfChildren());
    Assert.assertFalse(inodeFolder.getChildrenIds().contains(2));
  }
  