嘲笑Jest中的WebSocket

我想测试一个使用WebSocket的库。我试图用下面的代码来模拟websocket。图书馆ROSController使用网络插座，但我不断收到WebSocket is not defined.嘲笑Jest中的WebSocket

import { ROSController } from '../ROSController.jsx'; 
var socketMock; 
var windowMock; 
var address = 'ws://test.address'; 

beforeAll(function() { 
    var WebSocket = jasmine.createSpy(); 
    WebSocket.and.callFake(function (url) { 
     socketMock = { 
     url: url, 
     readyState: WebSocket.CONNECTING, 
     send: jasmine.createSpy(), 
     close: jasmine.createSpy().and.callFake(function() { 
      socketMock.readyState = WebSocket.CLOSING; 
     }), 

     // methods to mock the internal behaviour of the real WebSocket 
     _open: function() { 
      socketMock.readyState = WebSocket.OPEN; 
      socketMock.onopen && socketMock.onopen(); 
     }, 
     _message: function (msg) { 
      socketMock.onmessage && socketMock.onmessage({data: msg}); 
     }, 
     _error: function() { 
      socketMock.readyState = WebSocket.CLOSED; 
      socketMock.onerror && socketMock.onerror(); 
     }, 
     _close: function() { 
      socketMock.readyState = WebSocket.CLOSED; 
      socketMock.onclose && socketMock.onclose(); 
     } 
     }; 
     return socketMock; 
    }); 
    WebSocket.CONNECTING = 0; 
    WebSocket.OPEN = 1; 
    WebSocket.CLOSING = 2; 
    WebSocket.CLOSED = 3; 
    windowMock = { 
     WebSocket: WebSocket 
    }; 

    return WebSocket; 
}); 

test('the subscription JSON produced is correct',() => { 
    console.log(WebSocket); //<----- It fails here 
    JSON.parse((new ROSController('')).callService('/test','', function(){})); 

});

来源

2017-03-17 cjds

“jasmine”在哪里申报？ – jered

在我的package.json中？我只是在项目的根部运行Jest。这是在scripts/__ tests__文件夹中。 Jest似乎运行良好，我只是无法拿起WebSocket变量 – cjds

在开玩笑，你需要的东西，应该在全球范围内又名window可用，添加到global命名空间：

global.WebSocket= WebSocket

来源

2017-03-20 07:18:20

这不适合我。我已经在测试设置和单元测试中将WebSocket添加到全局范围。在这两种情况下，我得到一个'ReferenceError：WebSocket没有定义' –

使用mock-socket包，然后global以使其可用于的NodeJS：

import { WebSocket } from 'mock-socket'; 

global.WebSocket = WebSocket;

来源

2017-09-28 11:35:21

嘲笑Jest中的WebSocket

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