viewHelper.addInlineMimeType("text/plain");

        assertNotNull(viewHelper.getActionHook());

        ViewHelper.ActionHook actionHook = new ViewHelper.ActionHook();
        viewHelper.setActionHook(actionHook);
        assertEquals(actionHook, viewHelper.getActionHook());

        viewHelper.setEncodeUrlLink(true);
        viewHelper.setUrlLinkEncoding("UTF-8");