code: def test_ahdr_format():
      """Test case for parsing data in ahdr format."""
      expected_num_channels = 6
      expected_hp = 0.0
      expected_lp = 250.0
  
      raw = read_raw_brainvision(vamp_ahdr)
      assert raw.info["nchan"] == expected_num_channels
      assert raw.info["highpass"] == expected_hp
      assert raw.info["lowpass"] == expected_lp
  
imports: import datetime
  import re
  import shutil
  from pathlib import Path
  import numpy
  import pytest
  from numpy.testing import assert_allclose, assert_array_equal
  from mne import concatenate_raws, pick_types, read_annotations
  from mne._fiff.constants import FIFF
  from mne.annotations import events_from_annotations
  from mne.datasets import testing
  from mne.io import read_raw_brainvision, read_raw_fif
  from mne.io.tests.test_raw import _test_raw_reader
  from mne.utils import _stamp_to_dt, object_diff
label_desc: Use image node_id 22 for calling a global function with example usage: test_ahdr_format() without return types