使用jasmine angular2注入私有服务的单元测试

import { TestBed, async } from '@angular/core/testing';
import { YourComponent } from './your.component';
import { YourService } from './your.service';

beforeEach(async(() => {
  TestBed.configureTestingModule({
    declarations: [YourComponent],
    providers: [YourService] // 注入私有服务
  }).compileComponents();
}));

beforeEach(() => {
  fixture = TestBed.createComponent(YourComponent);
  component = fixture.componentInstance;
  fixture.detectChanges();
});

it('should call service method', () => {
  const service = TestBed.inject(YourService); // 获取注入的私有服务实例
  spyOn(service, 'yourMethod').and.returnValue('mocked value'); // 模拟服务方法的返回值
  component.someMethod(); // 调用组件中使用服务的方法
  expect(service.yourMethod).toHaveBeenCalled(); // 断言服务方法被调用
  expect(component.someProperty).toEqual('mocked value'); // 断言组件属性的值
});