assertEquals("if(ctx._source.lang!=null){ctx._source['title_'+ctx._source.lang]=ctx._source.title}", result);
    }

    @Test
    public void test_getReindexScriptSource_multipleFields() {
        languageHelper.langFields = new String[] { "title", "content", "description" };

        String result = languageHelper.getReindexScriptSource();
        assertEquals(