import sys
from types import ModuleType

from django.conf import CSRF_COOKIE_MASKED_DEPRECATED_MSG, Settings, settings
from django.test import SimpleTestCase
from django.utils.deprecation import RemovedInDjango50Warning


class CsrfCookieMaskedDeprecationTests(SimpleTestCase):
    msg = CSRF_COOKIE_MASKED_DEPRECATED_MSG

    def test_override_settings_warning(self):
        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):
            with self.settings(CSRF_COOKIE_MASKED=True):
                pass

    def test_settings_init_warning(self):
        settings_module = ModuleType('fake_settings_module')
        settings_module.USE_TZ = False
        settings_module.CSRF_COOKIE_MASKED = True
        sys.modules['fake_settings_module'] = settings_module
        try:
            with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):
                Settings('fake_settings_module')
        finally:
            del sys.modules['fake_settings_module']

    def test_access(self):
        # Warning is not raised on access.
        self.assertEqual(settings.CSRF_COOKIE_MASKED, False)