code: def test_get_dataset_for_unknown_channel(sgli_vn_file):
      """Test that counts can be extracted from a file."""
      handler = HDF5SGLI(sgli_vn_file, {"resolution": "L"}, {})
      did = dict(
          name="VIN",
          resolution=1000,
          polarization=None,
          calibration="counts",
      )
      with pytest.raises(KeyError):
          handler.get_dataset(
              did,
              {
                  "file_key": "Image_data/Lt_VIN01",
                  "units": "",
                  "standard_name": "",
              },
          )
  
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 8 for calling a global function with example usage: test_get_dataset_for_unknown_channel(sgli_vn_file) without return types