如何在Angular2单元测试中导入或注入AngularJS服务

我在AngularJS有自己的一项服务。我在Angular 2中的一个组件中使用了它。现在，当我为组件编写单元测试时，我无法导入或注入该服务。有谁能帮我解决这个问题。

您需要使用Angular TestBed设置测试并注入服务

import { TestBed, async, ComponentFixture } from '@angular/core/testing';

describe('', () => {
  let fixture: ComponentFixture<TestComponent>;
  let component: TestComponent;
  let service;

  beforeEach(async(() => {

    TestBed.configureTestingModule({
       imports: [
         AppModule
       ],
       declarations: [ 
       ],
       providers: [
       ]}).compileComponents()
      .then(() => {
         fixture = TestBed.createComponent(TestComponent);
         comp = fixture.componentInstance;

         service = TestBed.get(AppService);
      });
   }));
});

 it('should fetch the cluster list on init', async(() => {
    expect(service.getList).toHaveBeenCalled();
});