[ticket/12775] Add tests for the container factory

PHPBB3-12775

tests/mock/container_factory.php

@@ -0,0 +1,20 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+class phpbb_mock_container_factory extends \phpbb\di\container_factory
+{
+	protected function get_container_filename()
+	{
+		return $this->phpbb_root_path . '../../tmp/cache/container.' . $this->php_ext;
+	}
+}