Question

如何为具有依赖于http

的构造函数的以下类编写jasmine测试用例

import {Injectable} from 'angular2/core';
import {Http, HTTP_PROVIDERS} from 'angular2/http';

@Injectable()
export class MockUserService {
    items:Array<any>;

    constructor(http:Http){
        http.get('http://127.0.0.1:8080/src/data/names.json')
        .subscribe(res => {
            this.items = res;
            console.log('results found');
        })
    }
}

我尝试了以下方式，

 it('Testing user login', inject([MockUserService,Http], (mockUserService:MockUserService ) => {
   let http:Http;
        let mockUserService: MockUserService = new MockUserService(http);
     expect(1+1).toEqual(2);

  });
  );

我收到DI错误： DI error Image

Answer 1

这个测试 https://github.com/angular/angular/blob/master/modules/angular2/test/http/http_spec.ts#L104 使用return new Http(backend, defaultOptions);，其中backend是MockBackend（import {MockBackend, MockConnection} from 'angular2/src/http/backends/mock_backend';

Answer 2

您可以轻松地将beforeEachProviders用于DI：

beforeEachProviders(() => [
  HTTP_PROVIDERS,
  MockUserService
]);

describe('MockUser Service', () => {
  it('Testing user login',
    inject([MockUserService], (service: MockUserService) => {
      expect(1 + 1).toEqual(2);
    }));
});

我希望这对你有帮助（至少6个月前）。

测试具有http依赖性的构造函数的angular2服务

2 个答案: