public TestFileSystems(FileSystem fs) throws IOException {
  conf = new TajoConf();

  if(fs instanceof S3FileSystem){
    conf.set(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, "10");
    fs.initialize(URI.create(fs.getScheme() + ":///"), conf);
  }
  this.fs = fs;
  sm = StorageManagerFactory.getStorageManager(conf);
  testDir = getTestDir(this.fs, TEST_PATH);
}