code: def test_to_dict(self):
      self.query_params["baz"] = ""
      result_dict = {"foo": "bar", "two": "y", "baz": ""}
      assert self.query_params.to_dict() == result_dict
  
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 34 for calling the QueryParamsMethodTests obj's underlying member method code with example usage: obj.test_to_dict() without return types