new_contents: from django_webtest import WebTest
  from candidates.tests.helpers import TmpMediaRootMixin
  
  from candidates.tests.factories import PersonFactory, faker_factory
  from people.models import PersonImage
  from moderation_queue.tests.paths import EXAMPLE_IMAGE_FILENAME
  
  from sorl.thumbnail import get_thumbnail
  
  
  class TestPersonModels(TmpMediaRootMixin, WebTest):
      def test_get_display_image_url(self):
          person = PersonFactory(name=faker_factory.name())
  
          self.assertEqual(
              person.get_display_image_url(),
              "/static/candidates/img/blank-person.png",
          )
  
          pi = PersonImage.objects.create_from_file(
              EXAMPLE_IMAGE_FILENAME,
              "images/jowell-pilot.jpg",
              defaults={
                  "person": person,
                  "is_primary": True,
                  "source": "Taken from Wikipedia",
                  "copyright": "example-license",
                  "user_notes": "A photo of Tessa Jowell",
              },
          )
  
          url = get_thumbnail(pi.image, "x64").url
  
          self.assertEqual(person.get_display_image_url(), url)
  
subject: Add more person tests