code: def test_longArrays(tmpdir):
      """
      Test config saving and loading of long arrays.
      """
      arr = np.arange(20)
  
      tf = tmpdir.join("config.cfg")
      configfile.writeConfigFile({"arr": arr}, tf)
      config = configfile.readConfigFile(tf)
      assert all(config["arr"] == arr)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_longArrays(tmpdir) without return types