test to get django's logging set up

test_logging.py

import logging
import sys
from unittest.mock import patch # reqs. python 3. change to from mock if p2.

from django.conf.urls import url
from django.http import HttpResponse
from django.test import TestCase
from .urls import urlpatterns

## test assumes a bare django project created called "myproj"
## django-admin.py startproject myproj
## then this file saved as myproj/myproj/test_logging.py
## then run python3 manage.py test


def do_logging(request):
    # a simple view to test logging
    # that we monkeypatch into the project urlpatterns
    logging.debug('debug logged')
    logging.info('info logged')
    logging.warning('warning logged')
    logging.critical('critical logged')
    return HttpResponse('done')
urls_with_logging_test = urlpatterns + [url(r'^testlogging/$', do_logging)]


class LoggingTest(TestCase):

    @patch('myproj.urls.urlpatterns', urls_with_logging_test)
    @patch('sys.stderr')
    def test_log_to_stderr(self, mock_stderr):
        response = self.client.get('/testlogging/')
        self.assertEqual(response.content.decode(), 'done')
        written = ''.join(c[0][0] for c in mock_stderr.write.call_args_list)
        print(written)
        self.assertIn('critical logged', written)
        self.assertIn('warning logged', written)
        self.assertIn('info logged', written)
        self.assertIn('debug logged', written)