使用 Jasmine 测试 Web 套接字

2022-01-11 00:00:00 websocket unit-testing jasmine stomp javascript

这是一些使用 stomp 协议为 web-socket 编写的代码.

Here is some code that has been written for web-socket using stomp protocol.

function WS(url) {
    var ws = new SockJS('/notifications');

    this.client = Stomp.over(ws),

    this.client.connect('', '', function() {
        console.log('Connected');
    }, function(error) {
        console.log('STOMP protocol error: ', error.headers.message);
    });
}

WS.prototype.disconnect = function() {
};

WS.prototype.subscribe = function() {
};

WS.prototype.unSubscribe = function() {
};

WS.prototype.send = function(msg) {
};

我找到了这篇文章，但它需要实际连接到服务器，单元测试Node.js和WebSockets (Socket.io)

I found this post but it requires actual connection to server, Unit testing Node.js and WebSockets (Socket.io)

我们如何使用 Jasmine 进行测试.寻找一种伪造网络套接字服务器和触发事件(连接、断开连接等)的方法.我将不胜感激任何示例或有用的链接.

How do we test this using Jasmine. Looking for a way to fake web-socket server and fire events (connect, disconnect etc). I'll appreciate any example or useful link.

推荐答案

只需模拟函数的所有依赖项，因此在您的情况下，这将是 SockJS 和 Stomp.over.

Just mock all your dependencies of your function, so in your case this will be SockJS and Stomp.over.

var wsSpy = jasmine.createSpy();
spyOn(window, 'SockJs').andReturn(wsSpy);

var clientSpy = jasmine.createSpy();
spyOne(Stomp, 'over').andReturn(clientSpy)

运行脚本后，您可以测试他们被调用的间谍.要运行回调函数，您可以使用 mostRecentCall.args 找到它们并在测试中调用它们:

After running your script you can test on the spies that they was called. To run the callback functions you can use mostRecentCall.args to find them and call them in the test:

var successCallBack = clientSpy.mostRecentCall.args[2];
successCallBack();

var errorCallBack = clientSpy.mostRecentCall.args[3];
errorCallBack();

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