无法测试Flask Decorator

Question

正在使用以下装饰器：

import flask_login as login
from functools import wraps
from myapp.utils.api_response import get_failure_response


def authenticate(f):
    @wraps(f)
    def wrapper(*args, **kwargs):
        if login.current_user.is_anonymous:
            return get_failure_response({'error': 'user not logged in'}, 400, 'please login')
        return f(*args, **kwargs)

    return wrapper

我正在使用pytest并编写以下测试用例：

from myapp.api.decorator import authenticate
import flask_login
from mock import mock
from mock import MagicMock
import myapp.utils.api_response as api_response
#from myapp.utils.api_response import get_failure_response, get_success_response


@mock.patch.object(flask_login, 'current_user')
@mock.patch.object(api_response, 'get_failure_response')
def test_is_authenticate_decorator(mock_current_user, mock_get_failure_response):

     current_user = mock.Mock()
     current_user.is_anonymous = False
     mock_current_user.return_value = current_user
     mock_get_failure_response.return_value = "Success"
     is_authenticated = True
     try:
         with mock.patch('myapp.utils.api_response.get_failure_response') as MockClass:
             @authenticate
             def mock_func(is_authenticated):
                 return is_authenticated
             MockClass.return_value = "Working"  # Change the return value
             mock_func(is_authenticated)
     except Exception as e:
         pass

但它始终会出现异常，并显示应用程序不存在的消息。我如何测试以下装饰器功能。