old_contents: from django.test import TestCase
  
  # Create your tests here.
  
new_contents: from django.test import TestCase
  
  
  from .models import CustomUser, Member
  
  
  class TestCustomUserManager(TestCase):
      def test_create_user(self):
          new_user = CustomUser.objects.create_user('test@example.com')
          self.assertTrue(new_user.pk)
  
      def test_create_user_no_email(self):
          with self.assertRaises(ValueError) as context_manager:
              new_user = CustomUser.objects.create_user(email=None)
  
      def test_create_superuser(self):
          new_user = CustomUser.objects\
              .create_superuser(email='super@example.com', password='password')
          self.assertTrue(new_user.is_admin)
          self.assertTrue(new_user.is_staff)
          self.assertTrue(new_user.check_password('password'))
          self.assertTrue(new_user.pk)
  
  
  class TestCustomUser(TestCase):
      def setUp(self):
          self.new_user = CustomUser.objects.create_user('test@example.com')
  
      def test_get_short_name(self):
          self.assertEqual(self.new_user.get_short_name(), 'test@example.com')
  
      def test_get_full_name(self):
          self.assertEqual(self.new_user.get_full_name(), 'test@example.com')
  
  
  class TestMember(TestCase):
      def setUp(self):
          self.new_member = Member.objects.create(
              first_name='First',
              last_name='Last',
              post_code='H0H0H0'
              )
  
      def test_get_full_name(self):
          self.assertEqual(self.new_member.get_full_name(), 'First Last')
          self.assertEqual(self.new_member.get_short_name(), 'Last')
  
          # add email to instance
          self.new_member.email = 'member@example.com'
          self.assertEqual(self.new_member.get_short_name(),
                           'member@example.com')
  
subject: Test for registration models.