import { TestBed, ComponentFixture } from '@angular/core/testing'; import { MyComponent } from './my.component'; describe('MyComponent', () => { let component: MyComponent; let fixture: ComponentFixtureIn this example, `whenStable()` is used to wait for all asynchronous tasks in the component to complete before performing an assertion. The package library being used here is `@angular/core/testing`.; beforeEach(async () => { await TestBed.configureTestingModule({ declarations: [MyComponent] }).compileComponents(); }); beforeEach(() => { fixture = TestBed.createComponent(MyComponent); component = fixture.componentInstance; fixture.detectChanges(); }); it('should do something after all asynchronous tasks complete', async () => { await fixture.whenStable(); // perform assertion or other test task here }); });