code: def setUp(self) -> None:
      super().setUp()
      # Create a new MediaFileManager and assign its storage to
      # MediaFileHandler.
      storage = MemoryMediaFileStorage(MOCK_ENDPOINT)
      self.media_file_manager = MediaFileManager(storage)
      MediaFileHandler.initialize_storage(storage)
  
file_path: streamlit/lib/tests/streamlit/web/server/media_file_handler_test.py
imports: from unittest import mock
  from unittest.mock import MagicMock
  import tornado.testing
  import tornado.web
  from parameterized import parameterized
  from typing_extensions import Final
  from streamlit.runtime.media_file_manager import MediaFileManager
  from streamlit.runtime.memory_media_file_storage import MemoryMediaFileStorage
  from streamlit.web.server.media_file_handler import MediaFileHandler
label_desc: Use image node_id 1 for calling the MediaFileHandlerTest obj's underlying member method code with example usage: obj.setUp() without return types