try {
            if (highlightFields != null) {
                highlightFields.values().stream().forEach(highlightField -> {
                    final String text = viewHelper.createHighlightText(highlightField);
                    if (text != null) {
                        docMap.put(hlPrefix + highlightField.getName(), text);
                    }
                });

    }

    public void test_createHighlightText() {
        ViewHelper viewHelper = new ViewHelper();
        viewHelper.init();

        try {
            assertNull(viewHelper.createHighlightText(null));
        } catch (Exception e) {
            assertTrue(true);
        }
    }

    public void test_createTextFragmentsByHighlight() {
        ViewHelper viewHelper = new ViewHelper();