code: def _assert_mod_files_downloaded(comp_sensors, found_files):
      mod_cond = "modifiers/README.rst" in found_files
      unfriendly_cond = "modifiers/unfriendly.rst" in found_files
      if comp_sensors is not None and not comp_sensors:
          mod_cond = not mod_cond
      assert mod_cond
      assert not unfriendly_cond
  
imports: from unittest import mock
  import pytest
  import yaml
  from satpy.aux_download import DataDownloadMixin
  from satpy.modifiers import ModifierBase
label_desc: Use image node_id 7 for calling a global function with example usage: _assert_mod_files_downloaded(comp_sensors, found_files) without return types