Fixed #16961 -- Skipped resetting AUTO_INCREMENT fields for MySQL if the server version is greater than 5.0.12. This allows for much faster testing.

Thanks to aigarius for the report and claudep and ramiro for review.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17932 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/backends/tests.py

@@ -61,10 +61,34 @@ class OracleChecks(unittest.TestCase):
     def test_client_encoding(self):
         # If the backend is Oracle, test that the client encoding is set
         # correctly.  This was broken under Cygwin prior to r14781.
-        c = connection.cursor()  # Ensure the connection is initialized.
+        connection.cursor()  # Ensure the connection is initialized.
         self.assertEqual(connection.connection.encoding, "UTF-8")
         self.assertEqual(connection.connection.nencoding, "UTF-8")
 
+class MySQLTests(TestCase):
+    @unittest.skipUnless(connection.vendor == 'mysql',
+                        "Test valid only for MySQL")
+    def test_autoincrement(self):
+        """
+        Check that auto_increment fields are reset correctly by sql_flush().
+        Before MySQL version 5.0.13 TRUNCATE did not do auto_increment reset.
+        Refs #16961.
+        """
+        statements = connection.ops.sql_flush(no_style(),
+                                              tables=['test'],
+                                              sequences=[{
+                                                  'table': 'test',
+                                                  'col': 'somecol',
+                                              }])
+        found_reset = False
+        for sql in statements:
+            found_reset = found_reset or 'ALTER TABLE' in sql
+        if connection.mysql_version < (5,0,13):
+            self.assertTrue(found_reset)
+        else:
+            self.assertFalse(found_reset)
+
+
 class DateQuotingTest(TestCase):
 
     def test_django_date_trunc(self):