code: def test_persyst_wrong_file(tmp_path):
      """Test reading Persyst files when passed in wrong file path."""
      with pytest.raises(FileNotFoundError, match="The path you"):
          read_raw_persyst(fname_dat, preload=True)
  
      new_fname_lay = tmp_path / fname_lay.name
      new_fname_dat = tmp_path / fname_dat.name
      shutil.copy(fname_lay, new_fname_lay)
  
      # without a .dat file, reader should break
      desired_err_msg = (
          "The data path you specified does "
          "not exist for the lay path, "
          "sub-pt1_ses-02_task-monitor_acq-ecog_run-01_clip2.lay"
      )
      with pytest.raises(FileNotFoundError, match=desired_err_msg):
          read_raw_persyst(new_fname_lay, preload=True)
  
      # once you copy over the .dat file things should work
      shutil.copy(fname_dat, new_fname_dat)
      read_raw_persyst(new_fname_lay, preload=True)
  
file_path: mne-python/mne/io/persyst/tests/test_persyst.py
imports: import os
  import shutil
  import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from mne.datasets.testing import data_path, requires_testing_data
  from mne.io import read_raw_persyst
  from mne.io.tests.test_raw import _test_raw_reader
label_desc: Use image node_id 4 for calling a global function with example usage: test_persyst_wrong_file(tmp_path) without return types