Refs #20888 -- Added index order introspection.

tests/introspection/tests.py

@@ -182,6 +182,26 @@ class IntrospectionTests(TransactionTestCase):
         self.assertNotIn('first_name', indexes)
         self.assertIn('id', indexes)
 
+    @skipUnlessDBFeature('supports_index_column_ordering')
+    def test_get_constraints_indexes_orders(self):
+        """
+        Indexes have the 'orders' key with a list of 'ASC'/'DESC' values.
+        """
+        with connection.cursor() as cursor:
+            constraints = connection.introspection.get_constraints(cursor, Article._meta.db_table)
+        indexes_verified = 0
+        expected_columns = [
+            ['reporter_id'],
+            ['headline', 'pub_date'],
+            ['response_to_id'],
+        ]
+        for key, val in constraints.items():
+            if val['index'] and not (val['primary_key'] or val['unique']):
+                self.assertIn(val['columns'], expected_columns)
+                self.assertEqual(val['orders'], ['ASC'] * len(val['columns']))
+                indexes_verified += 1
+        self.assertEqual(indexes_verified, 3)
+
 
 def datatype(dbtype, description):
     """Helper to convert a data type into a string."""