code: def test_aws_ssm_get_connection(self, mock_get_value):
      mock_get_value.return_value = "scheme://user:pass@host:100"
      conn = SystemsManagerParameterStoreBackend().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_ssm
  from airflow.configuration import initialize_secrets_backends
  from airflow.providers.amazon.aws.secrets.systems_manager import SystemsManagerParameterStoreBackend
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 1 for calling the TestSsmSecrets obj's underlying member method code with example usage: obj.test_aws_ssm_get_connection(mock_get_value) without return types