code: def test_instance_set_to_connect_return_value(self):
      assert isinstance(
          MockConnection("my_mock_connection")._instance,
          MockRawConnection,
      )
  
imports: import os
  import unittest
  from unittest.mock import PropertyMock, mock_open, patch
  import pytest
  import streamlit
  from streamlit.connections import BaseConnection
  from streamlit.runtime.secrets import AttrDict
label_desc: Use image node_id 3 for calling the BaseConnectionDefaultMethodTests obj's underlying member method code with example usage: obj.test_instance_set_to_connect_return_value() without return types