code: def test_startend(himl2_filename):
      """Test start and end times are set correctly."""
      fh = ahil2_filehandler(himl2_filename)
      assert fh.start_time == start_time
      assert fh.end_time == end_time
  
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 4 for calling a global function with example usage: test_startend(himl2_filename) without return types