从JUnit测试自连接到Websocket Spring服务器

Question

我有一个应用程序，公开Websocket/SockJS/Stomp服务器endpoint，并想运行一个JUnit测试，运行客户端（JavaSTOMP客户端，也来自Spring）对它，以测试发送功能。

我有一个测试，如

 public void measureSpeedWithWebsocket() throws Exception {
    final Waiter subscribeWaiter = new Waiter();

    new Thread(() -> {
        // Prepare connection
        WebsocketClient listener = new WebsocketClient("/mytopic/stomp");
        try {
            listener.connectAndSubscribe();
            subscribeWaiter.resume();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }).start();
    subscribeWaiter.await(); // Wait for connection.

在这里，我从 https://github.com/jhalterman/concurrentunit 中使用了Water，其效果基本上是将测试的主线程延迟到辅助线程调用reachive（）。这可能是错误的，因为在上下文中运行的Spring服务器必须做出反应

我得到以下错误

[INFO ] 2017-02-03 12:36:12.402 [Thread-19] WebsocketClient - Listening  
[INFO ] 2017-02-03 12:36:12.403 [Thread-19] WebsocketClient - Connecting to ws://localhost:8083/user...
2017-02-03 12:36:14.097 ERROR 9956 --- [      Thread-19] o.s.w.socket.sockjs.client.SockJsClient  : Initial SockJS "Info" request to server failed, url=ws://localhost:8083/user
    org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost:8083/user/info": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:633) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:595) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.socket.sockjs.client.RestTemplateXhrTransport.executeInfoRequestInternal(RestTemplateXhrTransport.java:138) ~[spring-websocket-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.socket.sockjs.client.AbstractXhrTransport.executeInfoRequest(AbstractXhrTransport.java:155) ~[spring-websocket-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.socket.sockjs.client.SockJsClient.getServerInfo(SockJsClient.java:286) ~[spring-websocket-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.socket.sockjs.client.SockJsClient.doHandshake(SockJsClient.java:254) ~[spring-websocket-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.socket.messaging.WebSocketStompClient.connect(WebSocketStompClient.java:274) [spring-websocket-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.socket.messaging.WebSocketStompClient.connect(WebSocketStompClient.java:255) [spring-websocket-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    (...)
    at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_74]
Caused by: java.net.ConnectException: Connection refused: connect

我如何能够进行一个正确的测试，以“自连接”到我的Spring Boot应用程序提供的websocket？

Answer 1

如果你正在使用Spring Boot，那么你是幸运的：）。这里有一个例子http://rafaelhz.github.io/testing-websockets/如何测试网络套接字，它在Spring Boot中非常好用，可以帮到你很多。我正在尝试在Spring MVC中做同样的事情，但不幸的是，这在Spring MVC中不起作用。