错误：createConnection需要一个实例的请求，得到[对象对象] - Angular2，SytemJs

Question

我尝试与Angular2，SystemJs的MockBackends时遇到问题。我想测试我的服务方法的各种状态，但我不断收到错误（错误：createConnection需要一个请求的实例，得到[对象对象]）。我无法从Systemjs中看到任何404s。我尝试了直接从Angular2文档中进行单元测试，因为这也不起作用：

我还应该检查什么？

- 我的测试

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(); 

}); 

- 我的服务呼叫

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}]})));

响应的构造函数需要它的论点ResponseOptions包梁;-)

P.S .:几天前更新了master分支中的越野车示例，但doc仍使用旧标签。新样本可以在github上找到：https://github.com/angular/angular/blob/master/modules/@angular/http/testing/mock_backend.ts