public void touch(MockFile file) {
      if (fileStatusMap.containsKey(file)) {
        FileStatus fileStatus = fileStatusMap.get(file);
        FileStatus fileStatusNew = new FileStatus(fileStatus.getLen(), fileStatus.isDirectory(),
            fileStatus.getReplication(), fileStatus.getBlockSize(),
            fileStatus.getModificationTime() + 1, fileStatus.getAccessTime(),
            fileStatus.getPermission(), fileStatus.getOwner(), fileStatus.getGroup(),
            fileStatus.getPath());
        fileStatusMap.put(file, fileStatusNew);
      }
    }
WARNING: detele(Path...) don't actually delete
ql/src/test/org/apache/hadoop/hive/ql/io/orc/TestInputOutputFormat.java