code: /** 
   * Test file and folder creation, and rename;
   * @throws Exception
   */
  @Test public void RenameTest() throws Exception {
    for (int i=0; i < 10; i++) {
      mTfs.mkdir("/i" + i);
      for (int j=0; j < 10; j++) {
        mTfs.createFile("/i" + i + "/j"+ j,(i + j + 1) * 64);
        mTfs.rename("/i" + i + "/j"+ j,"/i" + i + "/jj"+ j);
      }
      mTfs.rename("/i" + i,"/ii" + i);
    }
    mLocalTachyonCluster.stop();
    RenameTestUtil();
    String editLogPath=mLocalTachyonCluster.getEditLogPath();
    UnderFileSystem.get(editLogPath).delete(editLogPath,true);
    RenameTestUtil();
  }
  