import { TestBed , waitForAsync } from '@angular/core/testing' ; import { RouterTestingModule } from '@angular/router/testing' ; import { AppComponent } from './app.component' ; describe ( 'AppComponent' , ( ) => { beforeEach ( waitForAsync ( ( ) => { TestBed . configureTestingModule ( { imports : [ RouterTestingModule ] , declarations : [ AppComponent ] , } ) . compileComponents ( ) ; } ) ) ; it ( 'should create the app' , ( ) => { const fixture = TestBed . createComponent ( AppComponent ) ; const app = fixture . componentInstance ; expect ( app ) . toBeTruthy ( ) ; } ) ; it ( `should have as title 'rxjs-operators-instance-methods'` , ( ) => { const fixture = TestBed . createComponent ( AppComponent ) ; const app = fixture . componentInstance ; expect ( app . title ) . toEqual ( 'rxjs-operators-instance-methods' ) ; } ) ; it ( 'should render title' , ( ) => { const fixture = TestBed . createComponent ( AppComponent ) ; fixture . detectChanges ( ) ; const compiled = fixture . nativeElement ; expect ( compiled . querySelector ( '.content span' ) . textContent ) . toContain ( 'rxjs-operators-instance-methods app is running!' ) ; } ) ; } ) ;