new_contents: # THIRD PARTY
  from django.core.mail import send_mail
  from django.test import override_settings
  from google.appengine.api.app_identity import get_application_id
  
  # DJANGAE
  from djangae.contrib import sleuth
  from djangae.test import TestCase
  
  
  class EmailBackendTests(TestCase):
  
      def _get_valid_sender_address(self):
          """ Return an email address which will be allowed as a 'from' address for the current App
              Engine app.
          """
          return "example@%s.appspotmail.com" % get_application_id()
  
      @override_settings(EMAIL_BACKEND='djangae.mail.EmailBackend')
      def test_send_email(self):
          """ Test that sending an email using Django results in the email being sent through App
              Engine.
          """
          with sleuth.watch('djangae.mail.aeemail.EmailMessage.send') as gae_send:
              send_mail("Subject", "Hello", self._get_valid_sender_address(), ["1@example.com"])
              self.assertTrue(gae_send.called)
  
      @override_settings(EMAIL_BACKEND='djangae.mail.AsyncEmailBackend')
      def test_send_email_deferred(self):
          """ Test that sending an email using Django results in the email being sent through App
              Engine.
          """
          with sleuth.watch('djangae.mail.aeemail.EmailMessage.send') as gae_send:
              send_mail("Subject", "Hello", self._get_valid_sender_address(), ["1@example.com"])
              self.process_task_queues()
              self.assertTrue(gae_send.called)
  
subject: Add some basic tests for the Djangae email backends.