don t use overridesettings to avoid calling the settingchanged signal but ensure that base leveltags hasn t been read yet this means that we need to ensure the base module is freshly imported the updateleveltags handler has been called at least once before running this code when using overridesettings don t use override_settings to avoid calling the setting_changed signal but ensure that base level_tags hasn t been read yet this means that we need to ensure the base module is freshly imported the update_level_tags handler has been called at least once before running this code when using override_settings
import importlib
import sys
from unittest import mock

from django.conf import settings
from django.contrib.messages import Message, add_message, constants
from django.contrib.messages.storage import base
from django.contrib.messages.test import MessagesTestMixin
from django.test import RequestFactory, SimpleTestCase, override_settings

from .utils import DummyStorage


class MessageTests(SimpleTestCase):
    def test_eq(self):
        msg_1 = Message(constants.INFO, "Test message 1")
        msg_2 = Message(constants.INFO, "Test message 2")
        msg_3 = Message(constants.WARNING, "Test message 1")
        self.assertEqual(msg_1, msg_1)
        self.assertEqual(msg_1, mock.ANY)
        self.assertNotEqual(msg_1, msg_2)
        self.assertNotEqual(msg_1, msg_3)
        self.assertNotEqual(msg_2, msg_3)

    @override_settings(
        MESSAGE_TAGS={
            constants.WARNING: "caution",
            constants.ERROR: "",
            12: "custom",
        }
    )
    def test_repr(self):
        tests = [
            (constants.INFO, "thing", "", "Message(level=20, message='thing')"),
            (
                constants.WARNING,
                "careful",
                "tag1 tag2",
                "Message(level=30, message='careful', extra_tags='tag1 tag2')",
            ),
            (
                constants.ERROR,
                "oops",
                "tag",
                "Message(level=40, message='oops', extra_tags='tag')",
            ),
            (12, "custom", "", "Message(level=12, message='custom')"),
        ]
        for level, message, extra_tags, expected in tests:
            with self.subTest(level=level, message=message):
                msg = Message(level, message, extra_tags=extra_tags)
                self.assertEqual(repr(msg), expected)


class TestLevelTags(SimpleTestCase):
    message_tags = {
        constants.INFO: "info",
        constants.DEBUG: "",
        constants.WARNING: "",
        constants.ERROR: "bad",
        constants.SUCCESS: "",
        12: "custom",
    }

    @override_settings(MESSAGE_TAGS=message_tags)
    def test_override_settings_level_tags(self):
        self.assertEqual(base.LEVEL_TAGS, self.message_tags)

    def test_lazy(self):
        storage_base_import_path = "django.contrib.messages.storage.base"
        in_use_base = sys.modules.pop(storage_base_import_path)
        self.addCleanup(sys.modules.__setitem__, storage_base_import_path, in_use_base)
        
        
        
        base = importlib.import_module(storage_base_import_path)
        old_message_tags = getattr(settings, "MESSAGE_TAGS", None)
        settings.MESSAGE_TAGS = {constants.ERROR: "bad"}
        try:
            self.assertEqual(base.LEVEL_TAGS[constants.ERROR], "bad")
        finally:
            if old_message_tags is None:
                del settings.MESSAGE_TAGS
            else:
                settings.MESSAGE_TAGS = old_message_tags

    @override_settings(MESSAGE_TAGS=message_tags)
    def test_override_settings_lazy(self):
        
        
        settings.MESSAGE_TAGS = {constants.ERROR: "very-bad"}
        self.assertEqual(base.LEVEL_TAGS[constants.ERROR], "very-bad")


class FakeResponse:
    def __init__(self):
        request = RequestFactory().get("/")
        request._messages = DummyStorage()
        self.wsgi_request = request


class AssertMessagesTest(MessagesTestMixin, SimpleTestCase):
    def test_assertion(self):
        response = FakeResponse()
        add_message(response.wsgi_request, constants.DEBUG, "DEBUG message.")
        add_message(response.wsgi_request, constants.INFO, "INFO message.")
        add_message(response.wsgi_request, constants.SUCCESS, "SUCCESS message.")
        add_message(response.wsgi_request, constants.WARNING, "WARNING message.")
        add_message(response.wsgi_request, constants.ERROR, "ERROR message.")
        self.assertMessages(
            response,
            [
                Message(constants.DEBUG, "DEBUG message."),
                Message(constants.INFO, "INFO message."),
                Message(constants.SUCCESS, "SUCCESS message."),
                Message(constants.WARNING, "WARNING message."),
                Message(constants.ERROR, "ERROR message."),
            ],
        )

    def test_with_tags(self):
        response = FakeResponse()
        add_message(
            response.wsgi_request,
            constants.INFO,
            "INFO message.",
            extra_tags="extra-info",
        )
        add_message(
            response.wsgi_request,
            constants.SUCCESS,
            "SUCCESS message.",
            extra_tags="extra-success",
        )
        add_message(
            response.wsgi_request,
            constants.WARNING,
            "WARNING message.",
            extra_tags="extra-warning",
        )
        add_message(
            response.wsgi_request,
            constants.ERROR,
            "ERROR message.",
            extra_tags="extra-error",
        )
        self.assertMessages(
            response,
            [
                Message(constants.INFO, "INFO message.", "extra-info"),
                Message(constants.SUCCESS, "SUCCESS message.", "extra-success"),
                Message(constants.WARNING, "WARNING message.", "extra-warning"),
                Message(constants.ERROR, "ERROR message.", "extra-error"),
            ],
        )

    @override_settings(MESSAGE_TAGS={42: "CUSTOM"})
    def test_custom_levelname(self):
        response = FakeResponse()
        add_message(response.wsgi_request, 42, "CUSTOM message.")
        self.assertMessages(response, [Message(42, "CUSTOM message.")])

    def test_ordered(self):
        response = FakeResponse()
        add_message(response.wsgi_request, constants.INFO, "First message.")
        add_message(response.wsgi_request, constants.WARNING, "Second message.")
        expected_messages = [
            Message(constants.WARNING, "Second message."),
            Message(constants.INFO, "First message."),
        ]
        self.assertMessages(response, expected_messages, ordered=False)
        with self.assertRaisesMessage(AssertionError, "Lists differ: "):
            self.assertMessages(response, expected_messages)

    def test_mismatching_length(self):
        response = FakeResponse()
        add_message(response.wsgi_request, constants.INFO, "INFO message.")
        msg = (
            "Lists differ: [Message(level=20, message='INFO message.')] != []\n\n"
            "First list contains 1 additional elements.\n"
            "First extra element 0:\n"
            "Message(level=20, message='INFO message.')\n\n"
            "- [Message(level=20, message='INFO message.')]\n"
            "+ []"
        )
        with self.assertRaisesMessage(AssertionError, msg):
            self.assertMessages(response, [])