private boolean mobTableDirExist(TableName tn) throws IOException {
    FileSystem fs = TEST_UTIL.getTestFileSystem();
    Path tableDir =
      CommonFSUtils.getTableDir(MobUtils.getMobHome(TEST_UTIL.getConfiguration()), tn);
    return fs.exists(tableDir);
  }
Generate the mob value. the size of the value
@return the mob value generated
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestDeleteMobTable.java