private var port = 0
  private val executor = Executors.newSingleThreadExecutor(threadFactory("MockHttp2Peer"))
  private var serverSocket: ServerSocket? = null
  private var socket: Socket? = null

  fun setClient(client: Boolean) {
    if (this.client == client) return
    this.client = client
    writer = Http2Writer(bytesOut, client)
  }

  fun acceptFrame() {
    frameCount++
  }

   * that we have to flush headers immediately before any request body can be sent.
   * https://github.com/square/okhttp/issues/2543
   */
  @Test fun peerSetsZeroFlowControl() {
    peer.setClient(true)

    // Write the mocking script.
    peer.sendFrame().settings(Settings().set(Settings.INITIAL_WINDOW_SIZE, 0))
    peer.acceptFrame() // ACK

                response = getClient().get(c -> c.prepareSearchScroll(sid).setScroll(new TimeValue(scrollTimeout)).execute());
                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }

                response = getClient().get(c -> c.prepareSearchScroll(sid).setScroll(new TimeValue(scrollTimeout)).execute());
                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }
    }

    @Override
    public void addClient(final List<String> regexList, final CrawlerClient client) {
        factory.addClient(regexList, client);
    }

    @Override
    public CrawlerClient getClient(final String url) {
        return factory.getClient(url);
    }

    @Override
    public void setClientMap(final Map<Pattern, CrawlerClient> clientMap) {
        factory.setClientMap(clientMap);
    }

    @Override

        client = clientFactory.getClient(url);
        assertNotNull(client);
        assertTrue(client instanceof FileSystemClient);

        url = "smb:/home/hoge";
        client = clientFactory.getClient(url);
        assertNotNull(client);
        assertTrue(client instanceof SmbClient);

        url = "smb1:/home/hoge";
        client = clientFactory.getClient(url);
        assertNotNull(client);

                response = getClient().get(c -> c.prepareSearchScroll(sid).setScroll(new TimeValue(scrollTimeout)).execute());
                if (!scrollId.equals(response.getScrollId())) {
                    getClient().clearScroll(scrollId);
                }
                scrollId = response.getScrollId();
            }
        } finally {
            getClient().clearScroll(scrollId);
        }
    }

            if (StringUtil.isNotBlank(regex)) {
                clientMap.put(Pattern.compile(regex), client);
            }
        }
    }

    public CrawlerClient getClient(final String urlKey) {
        if (StringUtil.isBlank(urlKey)) {
            return null;
        }

        for (final Map.Entry<Pattern, CrawlerClient> entry : clientMap.entrySet()) {

                }
            }
        }
    }

    protected CrawlerClient getClient(final String url) {
        return clientFactory.getClient(url);
    }

    protected boolean isContentUpdated(final CrawlerClient client, final UrlQueue<?> urlQueue) {
        if (urlQueue.getLastModified() != null) {

                return e.getFirst();
            }
            return null;
        }).filter(StringUtil::isNotBlank).findFirst()//
                .map(s -> clientFactory.getClient(s + ":" + url))//
                .orElseGet(() -> clientFactory.getClient(url));
        if (logger.isDebugEnabled()) {
            logger.debug("CrawlerClient: {}", client.getClass().getCanonicalName());
        }
        return client;
    }