code: def test_clock_xticks(raw, dur, n_dec, browser_backend):
      """Test if decimal seconds of xticks have appropriate length."""
      fig = raw.plot(duration=dur, time_format="clock")
      fig._redraw()
      tick_texts = fig._get_ticklabels("x")
      assert tick_texts[0].startswith("19:01:53")
      if len(tick_texts[0].split(".")) > 1:
          assert len(tick_texts[0].split(".")[1]) == n_dec
  
imports: import itertools
  import os
  from copy import deepcopy
  import matplotlib.pyplot
  import numpy
  import pytest
  from matplotlib import backend_bases
  from numpy.testing import assert_allclose
  from mne import Annotations, create_info, pick_types
  from mne._fiff.pick import _DATA_CH_TYPES_ORDER_DEFAULT, _PICK_TYPES_DATA_DICT
  from mne.annotations import _sync_onset
  from mne.datasets import testing
  from mne.io import RawArray
  from mne.utils import _assert_no_instances, _dt_to_stamp, _record_warnings, check_version, get_config, set_config
  from mne.viz import plot_raw, plot_sensors
  from mne.viz.utils import _fake_click, _fake_keypress
label_desc: Use image node_id 33 for calling a global function with example usage: test_clock_xticks(raw, dur, n_dec, browser_backend) without return types