import sys

from types import ModuleType

from django.conf import USE_L10N_DEPRECATED_MSG, Settings, settings

from django.test import TestCase, ignore_warnings

from django.utils.deprecation import RemovedInDjango50Warning

class DeprecationTests(TestCase):

    msg = USE_L10N_DEPRECATED_MSG

    def test_override_settings_warning(self):

        # Warning is raised when USE_L10N is set in UserSettingsHolder (used by

        # the @override_settings decorator).

        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):

            with self.settings(USE_L10N=True):

                pass

    def test_settings_init_warning(self):

        settings_module = ModuleType("fake_settings_module")

        settings_module.SECRET_KEY = "foo"

        settings_module.USE_TZ = True

        settings_module.USE_L10N = False

        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_warning(self):

        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):

            settings.USE_L10N

        # Works a second time.

        with self.assertRaisesMessage(RemovedInDjango50Warning, self.msg):

            settings.USE_L10N

    @ignore_warnings(category=RemovedInDjango50Warning)

    def test_access(self):

        with self.settings(USE_L10N=False):

            self.assertIs(settings.USE_L10N, False)

            # Works a second time.

            self.assertIs(settings.USE_L10N, False)