code: def test_channel_is_chunked(sgli_vn_file):
      """Test that the channel data is chunked."""
      with dask.config.set({"array.chunk-size": "1MiB"}):
          handler = HDF5SGLI(sgli_vn_file, {"resolution": "L"}, {})
          did = dict(
              name="VN1",
              resolution=1000,
              polarization=None,
              calibration="counts",
          )
          res = handler.get_dataset(
              did,
              {
                  "file_key": "Image_data/Lt_VN01",
                  "units": "",
                  "standard_name": "",
              },
          )
          assert res.chunks[0][0] > 116
  
imports: import sys
  from datetime import datetime, timedelta
  import dask
  import h5py
  import numpy
  import pytest
  from satpy.readers.sgli_l1b import HDF5SGLI
label_desc: Use image node_id 13 for calling a global function with example usage: test_channel_is_chunked(sgli_vn_file) without return types