from http import client as http_client

from oscar.test.testcases import WebTestCase
from oscar.apps.customer.notifications import services
from oscar.test.factories import UserFactory
from django.urls import reverse

from oscar.apps.customer.models import Notification


class TestAUserWithUnreadNotifications(WebTestCase):

    def setUp(self):
        self.user = UserFactory()
        services.notify_user(self.user, "Test message")

    def test_can_see_them_in_page_header(self):
        homepage = self.app.get('/', user=self.user)
        self.assertEqual(1, homepage.context['num_unread_notifications'])

    def test_notification_list_view_shows_user_notifications(self):
        response = self.app.get(reverse('customer:notifications-inbox'), user=self.user)
        self.assertEqual(1, len(response.context['notifications']))
        self.assertEqual(False, response.context['notifications'][0].is_read)

    def test_notification_marked_as_read(self):
        n = Notification.objects.first()
        path = reverse('customer:notifications-detail', kwargs={'pk': n.id})
        response = self.app.get(path, user=self.user)
        # notification should be marked as read
        self.assertEqual(http_client.OK, response.status_code)
        n.refresh_from_db()
        self.assertTrue(n.is_read)

from http import client as http_client

from oscar.test.testcases import WebTestCase
from oscar.apps.customer.notifications import services
from oscar.test.factories import UserFactory
from django.urls import reverse

from oscar.apps.customer.models import Notification


class TestAUserWithUnreadNotifications(WebTestCase):

    def setUp(self):
        self.user = UserFactory()
        services.notify_user(self.user, "Test message")

    def test_can_see_them_in_page_header(self):
        homepage = self.app.get('/', user=self.user)
        if homepage.status_code == 302:
            homepage = homepage.follow()
        self.assertEqual(1, homepage.context['num_unread_notifications'])

    def test_notification_list_view_shows_user_notifications(self):
        response = self.app.get(reverse('customer:notifications-inbox'), user=self.user)
        self.assertEqual(1, len(response.context['notifications']))
        self.assertEqual(False, response.context['notifications'][0].is_read)

    def test_notification_marked_as_read(self):
        n = Notification.objects.first()
        path = reverse('customer:notifications-detail', kwargs={'pk': n.id})
        response = self.app.get(path, user=self.user)
        # notification should be marked as read
        self.assertEqual(http_client.OK, response.status_code)
        n.refresh_from_db()
        self.assertTrue(n.is_read)

Update test in case if home page has redirection.
Update test in case if home page has redirection.
