Setting variable is not being set up during testing middleware (p-CodePudding

settings.py

MY_VAR = os.get("MY_VAR", False)

custom_middleware.py

from my_proj.settings import MY_VAR
from django.core.exceptions import MiddlewareNotUsed


class CustomMiddleware:
    def _init_(self, get_response):
        if MY_VAR == 'False':
            raise MiddlewareNotUsed
        self.get_response = get_response

    def __call__(self, request):
        if MY_VAR == 'True':
            #My custom logic
            return 
        response = self.get_response(request)
        return response

test_custom_middleware.py

import os from unittest.mock import Mock
from api.middlewares.custom_middleware import CustomMiddleware


class TestLCustomMiddleware:
    def test(self, settings):
        request = Mock()
        settings.MY_VAR = 'True'
        assert settings.MY_VAR
        with patch.dict('os.environ', {'MY_VAR': 'True'}):
            assert 'MY_VAR' in os.environ
            middleware = CustomMiddleware(get_response='response')
            middleware(request)

In CustomMiddleware I always get "False" in MY_VAR variable of settings. How can I set it up?

Updated.

Thanks to Philippe and Dharman. It works fine

custom_middleware.py

from django.conf import settings
from django.core.exceptions import MiddlewareNotUsed


class CustomMiddleware:
    def _init_(self, get_response):
        if settings.MY_VAR == 'False':
            raise MiddlewareNotUsed
        self.get_response = get_response

    def __call__(self, request):
        if settings.MY_VAR == 'True':
            #My custom logic
            return 
        response = self.get_response(request)
        return response

test_custom_middleware.py

from api.middlewares.custom_middleware import CustomMiddleware
from django.test import override_settings

class TestLCustomMiddleware:
    @override_settings(MY_VAR="True")
    def test(self):
        request = Mock()
        middleware = CustomMiddleware(get_response='response')
        middleware(request)

CodePudding user response：

As explaned in Django documentation, you should import your setting using :

from django.conf import settings

if settings.MY_VAR:
    # Do something

"django.conf.settings" isn’t a module, it’s an object. So importing individual settings is not possible. This example below won't work properly :

from django.conf.settings import MY_VAR

Furthermore, it's not recommended to change setting during Runtime :

from django.conf import settings

settings.DEBUG = True   # Don't do this!

Instead you should try using override_settings() or modify_settings(). For example :

from django.test import TestCase, override_settings

class TestLCustomMiddleware(TestCase):

    @override_settings(MY_VAR=True) # without quote
    def test(self):
        ...