Ticket #18319: django-ticket18319.diff

django/db/backends/__init__.py

@@ -398 +398 @@
     # Does the backend support tablespaces? Default to False because it isn't
     # in the SQL standard.
     supports_tablespaces = False
+    
+    # Does the backend reset sequences between tests?
+    supports_sequence_reset = True
 
     # Features that need to be confirmed at runtime
     # Cache whether the confirmation has been performed.

django/db/backends/oracle/base.py

@@ -83 +83 @@
     ignores_nulls_in_unique_constraints = False
     has_bulk_insert = True
     supports_tablespaces = True
+    supports_sequence_reset = False
 
 class DatabaseOperations(BaseDatabaseOperations):
     compiler_module = "django.db.backends.oracle.compiler"

tests/regressiontests/test_runner/tests.py

@@ -291 +291 @@
     and check that both times they get "1" as their PK value. That is, we test
     that AutoField values start from 1 for each transactional test case.
     """
-    @unittest.skipIf(connection.vendor == 'oracle',
-                     "Oracle's auto-increment fields are not reset between "
-                     "tests")
+    @unittest.skipIf(not connection.features.supports_sequence_reset,
+                     "Database backend's auto-increment fields are not reset "
+                     "between tests")
     def test_autoincrement_reset1(self):
         p = Person.objects.create(first_name='Jack', last_name='Smith')
         self.assertEqual(p.pk, 1)
 
-    @unittest.skipIf(connection.vendor == 'oracle',
-                     "Oracle's auto-increment fields are not reset between "
-                     "tests")
+    @unittest.skipIf(not connection.features.supports_sequence_reset,
+                     "Database backend's auto-increment fields are not reset "
+                     "between tests")
     def test_autoincrement_reset2(self):
         p = Person.objects.create(first_name='Jack', last_name='Smith')
         self.assertEqual(p.pk, 1)