[task#130120, 0.5h] add linkstories funtion.

module/story/test/lib/linkstory.ui.class.php

@@ -0,0 +1,20 @@
+<?php
+include dirname(__FILE__, 5) . '/test/lib/ui.php';
+/**
+ *@copyright   Copyright 2009-2023 禅道软件（青岛）有限公司(ZenTao Software (Qingdao) Co., Ltd. www.zentao.net)
+ *@license     ZPL(https://zpl.pub/page/zplv12.html) or AGPL(https://www.gnu.org/licenses/agpl-3.0.en.html)
+ *@author      lijie
+ *@package     story
+ *@link        http://www.zentao.net
+ */
+class linkStoryTester extends tester
+{
+    /**
+     * Check the linkstories after link story.
+     *
+     * @param string $storyID
+     * @access public
+     * @return object
+     */
+    public function linkStory($storyID)
+    {