如何在angular2 RC5中测试此服务？

npm install -g @angular/cli

ng new my-app

cd my-app

ng generate service my-service

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

import { MyServiceService } from './my-service.service';

describe('MyServiceService', () => {
  let service: MyServiceService;

  beforeEach(() => {
    TestBed.configureTestingModule({});
    service = TestBed.inject(MyServiceService);
  });

  it('should be created', () => {
    expect(service).toBeTruthy();
  });

  it('should return the correct result', () => {
    const result = service.myMethod();
    expect(result).toEqual('expected result');
  });
});

ng test