assertTrue(html.contains("<meta name=\"fess:content_length\" content=\"12345\">"));
    }

    @Test
    public void test_buildHtml_titleContentLangNotInMeta() {
        final Map<String, Object> source = new LinkedHashMap<>();
        source.put("title", "My Title");
        source.put("content", "My Content");
        source.put("lang", "ja");