code: def test__setitem__adds_list_value(self):
      self.query_params["test"] = ["test", "test2"]
      assert self.query_params["test"] == "test2"
      message = self.get_message_from_queue(0)
      assert (
          "test=test&test=test2"
          in message.page_info_changed.query_string
      )
  
imports: import pytest
  from streamlit.errors import StreamlitAPIException
  from streamlit.runtime.state.query_params import QueryParams
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 12 for calling the QueryParamsMethodTests obj's underlying member method code with example usage: obj.test__setitem__adds_list_value() without return types