text: from http import client as http_client
  
  from django.urls import reverse
  
  from oscar.core.loading import get_class, get_model
  from oscar.test.factories import UserFactory
  from oscar.test.testcases import WebTestCase
  
  Dispatcher = get_class('communication.utils', 'Dispatcher')
  Notification = get_model('communication', 'Notification')
  
  
  class TestAUserWithUnreadNotifications(WebTestCase):
  
      def setUp(self):
          self.user = UserFactory()
          Dispatcher().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)
  