code: def test_filehandler_has_start_and_end_time(insat_filehandler):
      """Test that the filehandler handles start and end time."""
      fh = insat_filehandler
  
      assert fh.start_time == start_time
      assert fh.end_time == end_time
  
imports: import os
  from datetime import datetime
  import dask.array
  import h5netcdf
  import numpy
  import pytest
  from satpy import Scene
  from satpy.readers.insat3d_img_l1b_h5 import CHANNELS_BY_RESOLUTION, LUT_SUFFIXES, Insat3DIMGL1BH5FileHandler, get_lonlat_suffix, open_dataset, open_datatree
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 19 for calling a global function with example usage: test_filehandler_has_start_and_end_time(insat_filehandler) without return types