data/webapp-ng/src/app/components/hero/hero.component.spec.ts

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

import { HeroComponent } from './hero.component';

describe('HeroComponent', () => {
  let component: HeroComponent;
  let fixture: ComponentFixture<HeroComponent>;

  beforeEach(waitForAsync(() => {
    TestBed.configureTestingModule({
      declarations: [HeroComponent],
    }).compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(HeroComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should create', () => {
    expect(component).toBeTruthy();
  });

  it('should render title in a h1 tag', () => {
    fixture.detectChanges();
    const compiled = fixture.debugElement.nativeElement;
    expect(compiled.querySelector('h1').textContent).toContain(
      'Angular Sample Project'
    );
  });
});