code: def test_secrets_property(self, _):
      conn = MockConnection("my_mock_connection")
      assert conn._secrets.foo == "bar"
  
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 7 for calling the BaseConnectionDefaultMethodTests obj's underlying member method code with example usage: obj.test_secrets_property(_) without return types