text: from django.test import TestCase
  from django.urls import reverse
  from django.utils.http import urlencode
  
  from wagtail.tests.testapp.models import EventPage
  from wagtail.tests.utils import WagtailTestUtils
  
  
  class TestContentTypeUse(TestCase, WagtailTestUtils):
      fixtures = ["test.json"]
  
      def setUp(self):
          self.user = self.login()
          self.christmas_page = EventPage.objects.get(title="Christmas")
  
      def test_content_type_use(self):
          # Get use of event page
          request_url = reverse(
              "wagtailadmin_pages:type_use", args=("tests", "eventpage")
          )
          response = self.client.get(request_url)
  
          # Check response
          self.assertEqual(response.status_code, 200)
          self.assertTemplateUsed(response, "wagtailadmin/pages/content_type_use.html")
          self.assertContains(response, "Christmas")
  
          # Links to 'delete' etc should include a 'next' URL parameter pointing back here
          delete_url = (
              reverse("wagtailadmin_pages:delete", args=(self.christmas_page.id,))
              + "?"
              + urlencode({"next": request_url})
          )
          self.assertContains(response, delete_url)
  