final String encoding = xmlExtractor.getEncoding(bis);
        CloseableUtil.closeQuietly(bis);
        assertEquals("UTF-8", encoding);
    }

    public void test_getRdf() {
        final InputStream in = ResourceUtil.getResourceAsStream("extractor/test.rdf");
        final String content = xmlExtractor.getText(in, null).getContent();
        CloseableUtil.closeQuietly(in);