class_docstr: Test reading multiple CLAAS-2 files.
class_docstr_tok: ["Test","reading","multiple","CLAAS-2","files","."]
docstr: Test combination of datasets.
docstr_tok: ["Test","combination","of","datasets","."]
code: def test_combine_datasets(
      self, multi_file_dataset, ds_name, expected
  ):
      """Test combination of datasets."""
      np.testing.assert_array_almost_equal(
          multi_file_dataset[ds_name].data, expected
      )
  
imports: import datetime
  import os
  import numpy
  import pytest
  import xarray
  from pyresample.geometry import AreaDefinition
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 4 for calling the TestCLAAS2MultiFile obj's underlying member method code with example usage: obj.test_combine_datasets(multi_file_dataset, ds_name, expected) without return types