code: def test_css_file(self):
      for use_directory_urls in True, False:
          with self.subTest(use_directory_urls=use_directory_urls):
              f = File(
                  "foo/bar.css",
                  "/path/to/docs",
                  "/path/to/site",
                  use_directory_urls,
              )
              self.assertEqual(f.src_uri, "foo/bar.css")
              self.assertPathsEqual(
                  f.abs_src_path, "/path/to/docs/foo/bar.css"
              )
              self.assertEqual(f.dest_uri, "foo/bar.css")
              self.assertPathsEqual(
                  f.abs_dest_path, "/path/to/site/foo/bar.css"
              )
              self.assertEqual(f.url, "foo/bar.css")
              self.assertEqual(f.name, "bar")
              self.assertFalse(f.is_documentation_page())
              self.assertFalse(f.is_static_page())
              self.assertTrue(f.is_media_file())
              self.assertFalse(f.is_javascript())
              self.assertTrue(f.is_css())
  
imports: import os
  import sys
  import unittest
  from unittest import mock
  from mkdocs.structure.files import File, Files, _sort_files, get_files
  from mkdocs.tests.base import PathAssertionMixin, load_config, tempdir
label_desc: Use image node_id 11 for calling the TestFiles obj's underlying member method code with example usage: obj.test_css_file() without return types