final SockJsServiceFactory echoFactory = echoService();
final String sessionUrl = echoFactory.config().prefix() + "/abc/" + UUID.randomUUID().toString();
final FullHttpResponse response = xhrRequest(sessionUrl, echoFactory);
assertThat(response.getStatus(), is(HttpResponseStatus.OK));
assertThat(response.content().toString(UTF_8), equalTo("o\n"));
final String content = "[\"" + clientKillerStringEsc() + "\"]";
final FullHttpResponse xhrSendResponse = xhrSendRequest(sessionUrl, content, echoFactory);
assertThat(xhrSendResponse.getStatus(), is(HttpResponseStatus.NO_CONTENT));