code: def test_get_conn_extra(self, mock_connect):
      self.connection.extra = '{"connect_timeout": 3}'
      self.db_hook.get_conn()
      mock_connect.assert_called_once_with(
          user="login",
          password="password",
          host="host",
          dbname="database",
          port=None,
          connect_timeout=3,
      )
  
imports: from __future__ import annotations
  import json
  import os
  from unittest import mock
  import psycopg2.extras
  import pytest
  from airflow.models import Connection
  from airflow.providers.postgres.hooks.postgres import PostgresHook
  from airflow.utils.types import NOTSET
label_desc: Use image node_id 11 for calling the TestPostgresHookConn obj's underlying member method code with example usage: obj.test_get_conn_extra(mock_connect) without return types