assertEquals(num, valueSet2.size());
    }

    @Test
    public void test_getLimitDocNum() throws Exception {
        assertEquals(10, ESSourceReader.getLimitDocNum(100, 10, -1));
        assertEquals(25, ESSourceReader.getLimitDocNum(50, 50, -1));
        assertEquals(10, ESSourceReader.getLimitDocNum(50, 50, 10));
    }

    @Test
    public void test_sort() throws Exception {

    <magic priority="50">
      <!-- Magic: '7', 'z', 0xBC, 0xAF, 0x27, 0x1C -->
      <match value="7z" type="string" offset="0:1" >
        <match value="0xBCAF271C" type="string" offset="2:5" />
      </match>
    </magic>
    <glob pattern="*.7z" />
  </mime-type>

  <mime-type type="audio/32kadpcm"/>
  <mime-type type="audio/3gpp"/>
  <mime-type type="audio/3gpp2"/>

            if (StringUtil.isBlank(s)) {
                throw new CrawlingAccessException("uri is blank.");
            }

            try {
                uri = new URI(normalize(s).replace("%", "%25").replace(" ", "%20"));
            } catch (final URISyntaxException e) {
                throw new CrawlingAccessException("Invalid URL: " + s, e);
            }

            if (!"ftp".equals(uri.getScheme())) {