[1.8.x] Fixed #24154 -- Backends can now check support for expressions

Backport of 8196e4bdf498acb05e6680c81f9d7bf700f4295c from master

1 files changed, 10 insertions, 3 deletions

diff --git a/tests/backends/tests.py b/tests/backends/tests.py
index 4a07cd5f2f..979ebefa01 100644
--- a/tests/backends/tests.py
+++ b/tests/backends/tests.py
@@ -128,12 +128,19 @@ class SQLiteTests(TestCase):
         #19360: Raise NotImplementedError when aggregating on date/time fields.
         """
         for aggregate in (Sum, Avg, Variance, StdDev):
-            self.assertRaises(NotImplementedError,
+            self.assertRaises(
+                NotImplementedError,
                 models.Item.objects.all().aggregate, aggregate('time'))
-            self.assertRaises(NotImplementedError,
+            self.assertRaises(
+                NotImplementedError,
                 models.Item.objects.all().aggregate, aggregate('date'))
-            self.assertRaises(NotImplementedError,
+            self.assertRaises(
+                NotImplementedError,
                 models.Item.objects.all().aggregate, aggregate('last_modified'))
+            self.assertRaises(
+                NotImplementedError,
+                models.Item.objects.all().aggregate,
+                **{'complex': aggregate('last_modified') + aggregate('last_modified')})
 
 
 @unittest.skipUnless(connection.vendor == 'postgresql', "Test only for PostgreSQL")