headers.setConnection("Upgrade");
headers.setSecWebSocketVersion("13");
headers.setSecWebSocketKey("82/ZS2YHjEnUN97HLL8tbw==");
headers.setSecWebSocketExtensions(Arrays.asList(extension1, extension2));
WebSocketHandler handler = new TextWebSocketHandler();
Map<String, Object> attributes = Collections.<String, Object>emptyMap();
this.handshakeHandler.doHandshake(this.request, this.response, handler, attributes);
verify(this.upgradeStrategy).upgrade(this.request, this.response, null, Arrays.asList(extension1),
null, handler, attributes);