code: def _assert_comp_files_downloaded(comp_sensors, found_files):
      comp_cond = "composites/README.rst" in found_files
      if comp_sensors is not None and not comp_sensors:
          comp_cond = not comp_cond
      assert comp_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 6 for calling a global function with example usage: _assert_comp_files_downloaded(comp_sensors, found_files) without return types