code: def test_files(dir_server):
      root = "http://localhost:8999/"
      fs = open_files([root + f for f in files])
      for f, f2 in zip(fs, files):
          with f as f:
              with open(os.path.join(dir_server, f2), "rb") as expected:
                  assert f.read() == expected.read()
  
imports: from __future__ import annotations
  import os
  import subprocess
  import sys
  import time
  import fsspec
  import pytest
  from fsspec.core import open_files
  from packaging.version import parse
  import dask.bag
  from dask.utils import tmpdir
label_desc: Use image node_id 8 for calling a global function with example usage: test_files(dir_server) without return types