相关疑难解决方法(0)

我正在尝试测试Angular应用程序中主机组件和子组件之间的交互.我不知道如何获取对父元素创建时创建的子组件的引用.这是设置:

child.component.spec.ts

@Component({template: `<child [data]="model"></child>`})
class HostComponent {
  public model:any;
}

describe('ChildComponent', () => {
  let hostFixture: ComponentFixture<HostComponent>;
  let childFixture: ComponentFixture<ChildComponent>;

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ChildComponent, HostComponent]
    });
  }));

  beforeEach(() => {
    // this creates the child component as well, but how to get to it?
    hostFixture = TestBed.createComponent(HostComponent);

    // this creates a NEW instance of child component, not the one from the Host template
    // so it's not the instance I actually want to test
    childFixture = TestBed.createComponent(ChildComponent); …