code: def test_get_connection(self, mock_hvac):
      mock_client = mock.MagicMock()
      mock_hvac.Client.return_value = mock_client
      mock_client.secrets.kv.v2.read_secret_version.return_value = {
          "request_id": "94011e25-f8dc-ec29-221b-1f9c1d9ad2ae",
          "lease_id": "",
          "renewable": False,
          "lease_duration": 0,
          "data": {
              "data": {
                  "conn_type": "postgresql",
                  "login": "airflow",
                  "password": "airflow",
                  "host": "host",
                  "port": "5432",
                  "schema": "airflow",
                  "extra": '{"foo":"bar","baz":"taz"}',
              },
              "metadata": {
                  "created_time": "2020-03-16T21:01:43.331126Z",
                  "deletion_time": "",
                  "destroyed": False,
                  "version": 1,
              },
          },
          "wrap_info": None,
          "warnings": None,
          "auth": None,
      }
  
      kwargs = {
          "connections_path": "connections",
          "mount_point": "airflow",
          "auth_type": "token",
          "url": "http://127.0.0.1:8200",
          "token": "s.7AU0I51yv1Q1lxOIg1F3ZRAS",
      }
  
      test_client = VaultBackend(**kwargs)
      connection = test_client.get_connection(conn_id="test_postgres")
      assert (
          "postgresql://airflow:airflow@host:5432/airflow?foo=bar&baz=taz"
          == connection.get_uri()
      )
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from hvac.exceptions import InvalidPath, VaultError
  from airflow.providers.hashicorp.secrets.vault import VaultBackend
label_desc: Use image node_id 3 for calling the TestVaultSecrets obj's underlying member method code with example usage: obj.test_get_connection(mock_hvac) without return types