How to mock django settings attribute used in another module?

Question

Lets say module a code:

from django.conf import settings
print settings.BASE_URL # prints http://example.com

In tests.py I want to mock the BASE_URL to http://localhost

I have tried the following:

with mock.patch('django.conf.settings.BASE_URL', 'http://localhost'):
    pass

with mock.patch('a.settings.BASE_URL', 'http://localhost'):
    pass

from a import settings

with mock.patch.object(settings, 'BASE_URL', 'http://localhost'):
    pass

import a

with mock.patch.object(a.settings, 'BASE_URL', 'http://localhost'):
    pass

None of the above worked.

Possible duplicate of [How to Unit test with different settings in Django?](https://stackoverflow.com/questions/913549/how-to-unit-test-with-different-settings-in-django) — Peter Thomassen, Nov 13 '19 at 13:31

score 40 · Accepted Answer · answered Mar 20 '17 at 10:23

40

Try to use context manager settings() built-in django.

with self.settings(BASE_URL='http://localhost'):
    # perform your test

https://docs.djangoproject.com/en/dev/topics/testing/tools/#django.test.SimpleTestCase.settings

answered Mar 20 '17 at 10:23

KePe

531
7
7

score 20 · Answer 2 · edited Jun 19 '22 at 09:29

20

You can also use the following decorator on your individual test functions or test class as a whole. For example:

from django.test import override_settings

@override_settings(BASE_URL='http://localhost')
def test_case()
    ...

edited Jun 19 '22 at 09:29

Joep

788
2
8
23

answered Jun 22 '20 at 12:14

Farhan Haider

1,244
1
13
22

1

Django docs https://docs.djangoproject.com/en/3.0/topics/testing/tools/#django.test.override_settings – Farhan Haider Jun 22 '20 at 12:19
1

To import this decorator in Django 3.0: `from django.test import override_settings` – Sarmad Gulzar Aug 03 '21 at 09:09

How to mock django settings attribute used in another module?

2 Answers2