3

我已经配置了一个 Django 应用程序,调用lucy_web它使用pybrake. 在lucy_web层次结构的一个模块中lucy_web.lib.session_recommendations,我定义了一个测试函数:

import logging

logger = logging.getLogger(__name__)

def log_something():
    logger.error("Logging something...")

如果我从 Django shell 调用这个函数,像这样:

(venv) Kurts-MacBook-Pro-2:lucy-web kurtpeek$ python manage.py shell
Python 3.6.4 (v3.6.4:d48ecebad5, Dec 18 2017, 21:07:28) 
Type 'copyright', 'credits' or 'license' for more information
IPython 6.3.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]: from lucy_web.lib.session_recommendation import *

In [2]: log_something()

我看到出现错误电子邮件:

在此处输入图像描述

但是,如果我定义一个测试并尝试从那里调用它,我看不到任何新的错误实例出现:

from django.test import TestCase
from django.core import mail


class SessionRecommendationTestCase(TestCase):
    def test_airbrake_notification_if_session_type_does_not_exist(self):
        from lucy_web.lib.session_recommendation import log_something
        log_something()
        import ipdb; ipdb.set_trace()

运行此操作不会导致 Airbrake 仪表板中出现任何新的错误实例。另外,mail.outbox是空的:

(venv) Kurts-MacBook-Pro-2:lucy-web kurtpeek$ python manage.py test lucy_web.tests.test_session_recommendation.SessionRecommendationTestCase.test_airbrake_notification_if_session_type_does_not_exist
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
--Return--
None
> /Users/kurtpeek/Documents/Dev/lucy2/lucy-web/lucy_web/tests/test_session_recommendation.py(377)test_airbrake_notification_if_session_type_does_not_exist()
    375         from lucy_web.lib.session_recommendation import log_something
    376         log_something()
--> 377         import ipdb; ipdb.set_trace()

ipdb> mail.outbox
[]

正如我从https://docs.djangoproject.com/en/2.0/topics/testing/tools/#email-services了解到的那样,在测试中,Django 将 Django 发送的所有电子邮件重定向到一个虚拟发件箱,mail.outbox. 不过,我不希望 Airbrake 会出现这种情况,因为电子邮件可能是由他们的后端发送的——如果是这样的话,我不希望mail.outbox它是空的。

为什么我没有收到任何 Airbrake 测试通知?是不是更通用,比如在测试期间所有日志记录都被禁用/捕获?

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1 回答 1

0

我通过在pybrake.Notifier'send_notice方法中设置跟踪来验证它不会在单元测试中被调用,而当我从 Django shell 中“手动”调用函数时它会这样做。

为了仍然获得测试覆盖率,我解决了这个问题,简单地断言logger.error被调用:

from django.test import TestCase
from unittest.mock import patch

class SessionRecommendationTestCase(TestCase):
    @patch('lucy_web.lib.session_recommendation.logger.error')
    def test_create_session_from_non_existent_session_type_title_triggers_error_logging(self, mock_error):
        title = "Being Awesome"    # Title of a non-existent session type
        _create_sessions([title])
        mock_error.assert_called_with(
            f"Tried to create a session of type '{title}', but no such session type was found in the database.")

这是我要测试的实际功能:

def _create_sessions(title_list, starting_number=1, **kwargs):
    '''Auxiliary function to create sessions from a list of SessionType titles'''
    session_number = starting_number
    for title in title_list:
        session_type = SessionType.objects.filter(title=title).first()
        if session_type:
            Session.objects.create(
                session_type=session_type,
                session_number=session_number,
                **kwargs)
            session_number += 1
        else:
            logger.error(
                f"Tried to create a session of type "
                f"'{title}', but no such session type was found in the database.")

该测试通过:

(venv) Kurts-MacBook-Pro-2:lucy-web kurtpeek$ python manage.py test lucy_web.tests.test_session_recommendation.SessionRecommendationTestCase.test_create_session_from_non_existent_session_type_title_triggers_error_logging
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
.
----------------------------------------------------------------------
Ran 1 test in 0.004s

OK
Destroying test database for alias 'default'...
于 2018-06-01T22:06:44.733 回答