code: def _check_fill_value(data_arr, test_fill_value):
      assert "_FillValue" not in data_arr.attrs
      assert not (data_arr.data == test_fill_value).any()
  
imports: from __future__ import annotations
  import os
  from datetime import datetime
  from unittest import mock
  import numpy
  import pytest
  import xarray
  from satpy._config import config_search_paths
  from satpy.dataset import DataID
  from satpy.readers import load_reader
  from satpy.readers.yaml_reader import FileYAMLReader
label_desc: Use image node_id 12 for calling a global function with example usage: _check_fill_value(data_arr, test_fill_value) without return types