code: def test_get_all_returns_correct_list(self):
      self.query_params_proxy["test"] = ["value1", "value2"]
      assert self.query_params_proxy.get_all("test") == [
          "value1",
          "value2",
      ]
  
imports: import unittest
  from typing import Dict, List, Union
  from unittest.mock import MagicMock, patch
  import pytest
  from streamlit.runtime.state.query_params import QueryParams
  from streamlit.runtime.state.query_params_proxy import QueryParamsProxy
  from streamlit.runtime.state.safe_session_state import SafeSessionState
  from streamlit.runtime.state.session_state import SessionState
label_desc: Use image node_id 9 for calling the TestQueryParamsProxy obj's underlying member method code with example usage: obj.test_get_all_returns_correct_list() without return types