viewHelper.setOriginalHighlightTagPost("</mark>");
        viewHelper.setCacheTemplateName("cache");
        viewHelper.setFacetCacheDuration(600L);
    }

    public void test_TextFragment() {
        ViewHelper.TextFragment fragment = new ViewHelper.TextFragment("prefix", "start", "end", "suffix");
        String urlString = fragment.toURLString();
        assertNotNull(urlString);