code: def _assert_writer_files_downloaded(writers, found_files):
      w_cond1 = "writers/README.rst" in found_files
      w_cond2 = "writers/README2.rst" in found_files
      if writers is not None and not writers:
          w_cond1 = not w_cond1
          w_cond2 = not w_cond2
      assert w_cond1
      assert w_cond2
  
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 5 for calling a global function with example usage: _assert_writer_files_downloaded(writers, found_files) without return types