import { TestBed , async } from '@angular/core/testing' ; import { AppComponent } from './app.component' ; import { HeaderComponent } from './components/header.component' ; import { FooterComponent } from './components/footer/footer.component' ; describe ( 'AppComponent' , ( ) => { beforeEach ( async ( ( ) => { TestBed . configureTestingModule ( { declarations : [ AppComponent , HeaderComponent , FooterComponent ] } ) . compileComponents ( ) ; } ) ) ; it ( 'should create the app' , async ( ( ) => { const fixture = TestBed . createComponent ( AppComponent ) ; const app = fixture . debugElement . componentInstance ; expect ( app ) . toBeTruthy ( ) ; } ) ) ; it ( `should have as title 'app'` , async ( ( ) => { const fixture = TestBed . createComponent ( AppComponent ) ; const app = fixture . debugElement . componentInstance ; expect ( app . title ) . toEqual ( 'app' ) ; } ) ) ; } ) ;