code: def test_aws_secrets_manager_get_connection(self, mock_get_value):
      mock_get_value.return_value = "scheme://user:pass@host:100"
      conn = SecretsManagerBackend().get_connection("fake_conn")
      assert conn.host == "host"
  
imports: from __future__ import annotations
  import json
  from unittest import mock
  import pytest
  from moto import mock_secretsmanager
  from airflow.providers.amazon.aws.secrets.secrets_manager import SecretsManagerBackend
label_desc: Use image node_id 1 for calling the TestSecretsManagerBackend obj's underlying member method code with example usage: obj.test_aws_secrets_manager_get_connection(mock_get_value) without return types