InetAddress server = InetAddresses.forString(serverStr);
    assertThat(teredo.getServer()).isEqualTo(server);

    InetAddress client = InetAddresses.forString(clientStr);
    assertThat(teredo.getClient()).isEqualTo(client);

    assertEquals(port, teredo.getPort());
    assertEquals(flags, teredo.getFlags());
  }

  public void testTeredoAddress_nullServer() {

        }

        final CrawlerClientFactory crawlerClientFactory = crawlingConfig.initializeClientFactory(ComponentUtil::getCrawlerClientFactory);
        final CrawlerClient client = crawlerClientFactory.getClient(url);
        if (client == null) {
            throw new CrawlingAccessException(
                    "CrawlerClient is null for URL: " + url + ". Unable to access the document without a crawler client.");
        }