Fixed #26446 -- Added additional tests to cover methods in the RequestSite class

        self.assertEqual(Site.objects.get_by_natural_key(self.site.domain), self.site)

        self.assertEqual(self.site.natural_key(), (self.site.domain,))

    def test_requestsite_save_notimplemented_msg(self):

        # Test response msg for RequestSite.save NotImplementedError

        request = HttpRequest()

        request.META = {

            "HTTP_HOST": "example.com",

        }

        msg = 'RequestSite cannot be saved.'

        with self.assertRaisesMessage(NotImplementedError, msg):

            RequestSite(request).save()

    def test_requestsite_delete_notimplemented_msg(self):

        # Test response msg for RequestSite.delete NotImplementedError

        request = HttpRequest()

        request.META = {

            "HTTP_HOST": "example.com",

        }

        msg = 'RequestSite cannot be deleted.'

        with self.assertRaisesMessage(NotImplementedError, msg):

            RequestSite(request).delete()

class JustOtherRouter(object):

    def allow_migrate(self, db, app_label, **hints):