Test introspection returns correct suggestions url

test_project/core/admin.py

@@ -15,6 +15,15 @@
 admin.site.unregister(User)
 
 
+class ZaibatsuAdminSite(admin.AdminSite):
+    site_header = 'Zaibatsu Admin'
+    site_title = 'Zaibatsu Admin Portal'
+    index_title = 'Welcome to Zaibatsu Admin Portal'
+
+
+zaibatsu_admin_site = ZaibatsuAdminSite(name='zaibatsu')
+
+
 class AuthorField(StrField):
     name = 'author'
     model = Book
@@ -137,7 +146,6 @@ def get_fields(self, model):
         return fields
 
 
-@admin.register(User)
 class CustomUserAdmin(DjangoQLSearchMixin, UserAdmin):
     djangoql_schema = UserQLSchema
     search_fields = ('username', 'first_name', 'last_name')
@@ -153,3 +161,7 @@ def get_queryset(self, request):
         return qs.\
             annotate(groups_count=Count('groups')).\
             prefetch_related('groups')
+
+
+admin.site.register(User, CustomUserAdmin)
+zaibatsu_admin_site.register(User, CustomUserAdmin)

test_project/core/tests/test_admin.py

@@ -35,6 +35,16 @@ def test_introspections(self):
         for model in ('core.book', 'auth.user', 'auth.group'):
             self.assertIn(model, introspections['models'])
 
+    def test_introspection_suggestion_api_url(self):
+        self.assertTrue(self.client.login(**self.credentials))
+        for app in ['admin', 'zaibatsu']:
+            url = reverse('%s:auth_user_djangoql_introspect' % app)
+            introspections = self.get_json(url)
+            self.assertEqual(
+                reverse('%s:auth_user_djangoql_suggestions' % app),
+                introspections['suggestions_api_url'],
+            )
+
     def test_djangoql_syntax_help(self):
         url = reverse('admin:djangoql_syntax_help')
         # unauthorized request should be redirected

test_project/test_project/urls.py

@@ -26,11 +26,13 @@
     except ImportError:  # Django < 2.0
         from django.conf.urls import url as re_path
 
+from core.admin import zaibatsu_admin_site
 from core.views import completion_demo
 
 
 urlpatterns = [
     re_path(r'^admin/', admin.site.urls),
+    re_path(r'^zaibatsu-admin/', zaibatsu_admin_site.urls),
     re_path(r'^$', completion_demo),
 ]