code: def setUp(self):
      super().setUp()
      self.storage = MemoryMediaFileStorage(
          media_endpoint="/mock/media"
      )
  
imports: import unittest
  from unittest import mock
  from unittest.mock import MagicMock, mock_open
  from parameterized import parameterized
  from streamlit.runtime.media_file_storage import MediaFileKind, MediaFileStorageError
  from streamlit.runtime.memory_media_file_storage import MemoryFile, MemoryMediaFileStorage, get_extension_for_mimetype
label_desc: Use image node_id 1 for calling the MemoryMediaFileStorageTest obj's underlying member method code with example usage: obj.setUp() without return types