How can I rewrite one value in the settings for the test

Question

How can I rewrite 'user': '5/minute' on 'user': '2/day' in the settings for the test

REST_FRAMEWORK = {
    'DEFAULT_THROTTLE_RATES': {
         'user': '5/minute'
    }
}

How can i do this with @override_settings or mb with context manage? I need to apply this only in one test, I can not rewrite the whole dictionary

def test_mytest(self):
    value = settings.REST_FRAMEWORK
    value['DEFAULT_THROTTLE_RATES'] = {'user':'2/day'}

    data1 = {}
    data2 = {}
    data3 = {}

with self.settings(REST_FRAMEWORK=value):
    resp1 = self.client.post(self.url, data1, format='json')
    resp2 = self.client.post(self.url, data1, format='json')
    resp3 = self.client.post(self.url, data1, format='json')

assert resp3.status_code == 429, resp3.data

But no have 429 error, although the value has changed

Answer 1

    from unittest import mock

    @mock.patch('rest_framework.throttling.SimpleRateThrottle.get_rate')
    def test_api(self, get_rate):
        get_rate.return_value = '1/minute'

        from rest_framework.settings import api_settings
        print(api_settings.DEFAULT_THROTTLE_RATES)
        print(api_settings.user_settings)


        url = 'api'

        response = self.client.get(url)
        self.assertEqual(response.status_code, HTTP_200_OK)

        response = self.client.get(url)
        self.assertEqual(response.status_code, HTTP_429_TOO_MANY_REQUESTS)

Answer 2

Solution 1: With the @override_default() wrapper

You want to apply a wrapper function to the viewset that you wish to override with this value:

from rest_framework.throttling import UserRateThrottle

class UserViewSet(viewsets.ViewSet):

    @api_view(['PUT'])
    @throttle_classes([UserRateThrottle])
    @override_settings(REST_FRAMEWORK['DEFAULT_THROTTLE_RATES']['user'] = "2/day")
    def update(self, request, pk=None):
        ...

Add the wrapper before any view or viewset you wish to apply this overridden customs value.

You also want this in your settings.py:

REST_FRAMEWORK = {
    'DEFAULT_THROTTLE_CLASSES': (
        'rest_framework.throttling.AnonRateThrottle',
        'rest_framework.throttling.UserRateThrottle'
    ),
    'DEFAULT_THROTTLE_RATES': {
        'anon': '100/day',
        'user': '13500/day'
    }
}

---

Solution 2: Custom throttling class

However, if you want different throttling rates for when you're in a test environment, perhaps try the following in settings.py:

TEST = True ## <-- Set to False when not in testing!!

REST_FRAMEWORK = {
    'DEFAULT_THROTTLE_CLASSES': (
        'rest_framework.throttling.CustomUserRateThrottle'
    )
}

And designate your own custom throttling class:

from django.conf import settings

class CustomUserRateThrottle(throttling.UserRateThrottle):
    if settings.TEST:
        THROTTLE_RATES = 'DEFAULT_THROTTLE_RATES': {
            'user': '13500/day',
        }
    else:
        THROTTLE_RATES = 'DEFAULT_THROTTLE_RATES': {
            'user': '2/day',
        } 
    return settings.TEST # <-- Custom throttling classes must always return either True or False, so this makes sense.

Solution 3: directly in your "testing shell":

Include your custom wrapper as we defined above but this time in your test_something() method in test.py:

from django.conf import settings
from django.test import TestCase

class TestCase(TestCase):

    def test_something(self):

       with self.settings(REST_FRAMEWORK = ['DEFAULT_THROTTLE_RATES']['user'] = '13500/day'):


       # START TESTING HERE WITH TEST SETTINGS

Answer 3

Depending on your use case you can follow one of the following ways :

Suggestion 1 : If you want to override settings in few specific test cases the you can use @override_settings decorator. But this make no sense if you want that for all test cases, if that's the case then you can follow suggestion 2.

Suggestion 2 : This is more generic and efficient solution.

You can have several settings file for various running environment (inside settings python module) something like this:

1. base.py (containing all of your basic settings)
2. local.py (import * from base here and override/add settings specific to local/dev environment)
3. test.py (import * from base here and override/add settings specific to test environment)
4. you can also have a settings specific for production environment in prod.py or something.

With this setup can run tests like python manage.py test --settings=yourproject.settings.test