錯誤：createConnection需要一個實例的請求，得到[對象對象] - Angular2，SytemJs

Question

我嘗試與Angular2，SystemJs的MockBackends時遇到問題。我想測試我的服務方法的各種狀態，但我不斷收到錯誤（錯誤：createConnection需要一個請求的實例，得到[對象對象]）。我無法從Systemjs中看到任何404s。我嘗試了直接從Angular2文檔中進行單元測試，因爲這也不起作用：

我還應該檢查什麼？

- 我的測試

it('should get a response',() => { 
    let connection; //this will be set when a new connection is emitted from the backend. 
    let text; //this will be set from mock response 
    let injector = ReflectiveInjector.resolveAndCreate([ 
     MockBackend, 
     BaseRequestOptions, 
     {provide: Http, useFactory: (backend, options) => { 
      return new Http(backend, options); 
     }, deps: [MockBackend, BaseRequestOptions]}]); 
    let backend = injector.get(MockBackend); 
    let http = injector.get(Http); 
    backend.connections.subscribe(c => connection = c); 
    http.request('https://jsonplaceholder.typicode.com/users').subscribe(res => { 
     text = res.text(); 
    }); 

    console.log('text: ', text); 

    connection.mockRespond(new Response({body: [{'id': 1}]})); 

    expect(text).toBeDefined(); 

}); 

- 我的服務呼叫

return this._http.get(this.url) 
      .map(res => res.json()); 

Answer 1

它

import {ResponseOptions} from '@angular/http'; (...) connection.mockRespond(new Response(new ResponseOptions({body: [{'id': 1}]})));

響應的構造函數需要它的論點ResponseOptions包梁;-)

P.S .:幾天前更新了master分支中的越野車示例，但doc仍使用舊標籤。新樣本可以在github上找到：https://github.com/angular/angular/blob/master/modules/@angular/http/testing/mock_backend.ts