class_docstr: Test VIRR L1B Reader.
class_docstr_tok: ["Test","VIRR","L1B","Reader","."]
code: def _create_reader_for_resolutions(self, *resolutions):
      from satpy.readers import load_reader
  
      filenames = _create_filenames_from_resolutions(
          self.satname, *resolutions
      )
      reader = load_reader(self.reader_configs)
      files = reader.select_files_from_pathnames(filenames)
      assert len(filenames) == len(files)
      reader.create_filehandlers(files)
      # Make sure we have some files
      assert reader.file_handlers
      return reader
  
imports: import os
  from unittest import mock
  import dask.array
  import numpy
  import pytest
  import xarray
  from satpy.tests.reader_tests.test_hdf5_utils import FakeHDF5FileHandler
label_desc: Use image node_id 10 for calling the Test_HDF_AGRI_L1_cal obj's underlying member method code with example usage: obj._create_reader_for_resolutions() and returns: reader