有没有办法在同一个 jasmine 文件中渲染两个 Angular 组件？

问题描述

我想用两个角度组件进行集成测试，为了做到这一点，我需要同时渲染两者。我们可以这样做吗？是一种好的做法吗？

解决方法

是的，你可以，它会涉及到 this 之类的东西。这可能是个好主意，具体取决于您要做什么。

试试：

import { By } from '@angular/platform-browser';
.....
// put this on top of the describe
@Component({
  template: `
    <component-1
      [hero]="hero" (selected)="onSelected($event)">
    </component-1>
    <component-2></component-2>
   `
})
class TestHostComponent {
  hero: Hero = {id: 42,name: 'Test Name'};
  selectedHero: Hero;
  onSelected(hero: Hero) {
    this.selectedHero = hero;
  }
}

let fixture: ComponentFixture<TestHostComponent>;
let component1: Component1;
let component2: Component2;
....
TestBed.configureTestingModule({
  declarations: [
    TestHostComponent,Component1,Component2,]
});
....
fixture = TestBed.createComponent(TestHostComponent);
testHost = fixture.componentInstance;
// get a handle on component1 and component2
component1 = fixture.debugElement.query(By.directive(Component1)).componentInstance;
component2 = fixture.debugElement.query(By.directive(Component2)).componentInstance;