private void handleRequest(AbstractHttpReceivingTransportHandler transportHandler) throws Exception {
WebSocketHandler wsHandler = mock(WebSocketHandler.class);
AbstractSockJsSession session = new TestHttpSockJsSession("1", new StubSockJsServiceConfig(), wsHandler, null);
transportHandler.initialize(new StubSockJsServiceConfig());
transportHandler.handleRequest(this.request, this.response, wsHandler, session);
assertEquals("text/plain;charset=UTF-8", this.response.getHeaders().getContentType().toString());
verify(wsHandler).handleMessage(session, new TextMessage("x"));
}