code: def test_filehandler_returns_coords(insat_filehandler):
      """Test that lon and lat can be loaded."""
      fh = insat_filehandler
      ds_info = None
  
      lon_id = make_dataid(name="longitude", resolution=1000)
      darr = fh.get_dataset(lon_id, ds_info)
      np.testing.assert_allclose(darr, values_1km.squeeze() / 100)
  
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 16 for calling a global function with example usage: test_filehandler_returns_coords(insat_filehandler) without return types