test : Verify that all the dataset encapsulate a dask array

satpy/tests/reader_tests/test_li_l2_nc.py

@@ -19,6 +19,7 @@
 import os
 from unittest import mock
 
+import dask.array as da
 import numpy as np
 import pytest
 import xarray as xr
@@ -128,6 +129,7 @@ def _test_dataset_variable(self, var_params, sname=""):
         res = self.get_variable_dataset(dataset_info, dname, handler)
         assert res.shape == shape
         assert res.dims[0] == "y"
+        assert isinstance(res.data,da.Array)
         # Should retrieve content with fullname key:
         full_name = self.create_fullname_key(desc, var_path, dname, sname=sname)
         # Note: 'content' is not recognized as a valid member of the class below