Error: createConnection requires an instance of Request, got [object Object] - Angular2, SytemJs

Question

我在尝试使用 Angular2、SystemJs 模拟后端时遇到了问题。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 需要一个请求实例，得到 [object Object]）。我也看不到来自 Systemjs 的任何 404。我尝试直接从 Angular2 文档中进行单元测试，因为它也不起作用：

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();

});

-- 我的服务电话

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

Answer 1

是

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

Response 的构造函数期望它的参数包含在 ResponseOptions 中；-)

P.S.: 几天前更新了 master 分支中的 buggy 样本，但 doc 仍然使用旧的标记样本。已经可以在 github 上找到新样本：https://github.com/angular/angular/blob/master/modules/@angular/http/testing/mock_backend.ts

Error: createConnection requires an instance of Request, got [object Object] - Angular2, SytemJs

Error: createConnection requires an instance of Request, got [object Object] - Angular2, SytemJs

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