[feature/migrations] Basic reverting test

PHPBB3-9737

tests/dbal/migration/revert_with_dependency.php

@@ -0,0 +1,16 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2011 phpBB Group
+* @license http://opensource.org/licenses/gpl-license.php GNU Public License
+*
+*/
+
+class phpbb_dbal_migration_revert_with_dependency extends phpbb_db_migration
+{
+	function depends_on()
+	{
+		return array('phpbb_dbal_migration_revert');
+	}
+}