code: def test_load_data(himl2_filename):
      """Test that data is loaded successfully."""
      fh = ahil2_filehandler(himl2_filename)
      clmk_id = make_dataid(name="cloudmask")
      clmk = fh.get_dataset(clmk_id, {"file_key": "CloudMask"})
      assert np.allclose(clmk.data, clmk_data)
  
file_path: satpy/satpy/tests/reader_tests/test_ahi_l2_nc.py
imports: from datetime import datetime
  import numpy
  import pytest
  import xarray
  from satpy.readers.ahi_l2_nc import HIML2NCFileHandler
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 7 for calling a global function with example usage: test_load_data(himl2_filename) without return types