[ticket/11420] Forgot to include mock sql_insert_buffer

PHPBB3-11420

tests/mock/sql_insert_buffer.php

@@ -0,0 +1,21 @@
+<?php
+/**
+*
+* @package testing
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+class phpbb_mock_sql_insert_buffer extends phpbb_db_sql_insert_buffer
+{
+	public function flush()
+	{
+		return (sizeof($this->buffer)) ? true : false;
+	}
+
+	public function get_buffer()
+	{
+		return $this->buffer;
+	}
+}