D-Net

import { TestBed, async } from '@angular/core/testing';

import { AppComponent } from './app.component';

describe('AppComponent', () => {

  beforeEach(async(() => {

    TestBed.configureTestingModule({

      declarations: [

        AppComponent

      ],

    }).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');

  }));

  it('should render title in a h1 tag', async(() => {

    const fixture = TestBed.createComponent(AppComponent);

    fixture.detectChanges();

    const compiled = fixture.debugElement.nativeElement;

    expect(compiled.querySelector('h1').textContent).toContain('Welcome to app!');

  }));

});