code: def test_load_empty_file(self):
      for lazy_load in [False, True]:
          tck = TckFile.load(
              DATA["empty_tck_fname"], lazy_load=lazy_load
          )
          with pytest.warns(Warning) if lazy_load else error_warnings():
              assert_tractogram_equal(
                  tck.tractogram, DATA["empty_tractogram"]
              )
  
imports: import os
  import unittest
  from io import BytesIO
  from os.path import join
  import numpy
  import pytest
  from numpy.testing import assert_array_equal
  from ...testing import data_path, error_warnings
  from ..None import tck
  from ..array_sequence import ArraySequence
  from ..tck import TckFile
  from ..tractogram import Tractogram
  from ..tractogram_file import DataError, HeaderError, HeaderWarning
  from .test_tractogram import assert_tractogram_equal
label_desc: Use image node_id 1 for calling the TestTCK obj's underlying member method code with example usage: obj.test_load_empty_file() without return types