docstr: Files with size greater than MAX_APP_STATIC_FILE_SIZE should return 404.
docstr_tok: ["Files","with","size","greater","than","MAX_APP_STATIC_FILE_SIZE","should","return","404","."]
code: def test_big_file_404(self):
      """Files with size greater than MAX_APP_STATIC_FILE_SIZE should return 404."""
      response = self.fetch(f"/app/static/{self._png_image_filename}")
      assert response.code == 404
      self.assertEqual(
          b"<html><title>404: File is too large</title>"
          b"<body>404: File is too large</body></html>",
          response.body,
      )
  
file_path: streamlit/lib/tests/streamlit/web/server/app_static_file_handler_test.py
imports: import os
  import tempfile
  from unittest.mock import MagicMock, patch
  import tornado.httpserver
  import tornado.testing
  import tornado.web
  import tornado.websocket
  from streamlit.web.server.app_static_file_handler import MAX_APP_STATIC_FILE_SIZE, AppStaticFileHandler
label_desc: Use image node_id 7 for calling the AppStaticFileHandlerTest obj's underlying member method code with example usage: obj.test_big_file_404() without return types