let component: BannerComponent;
let fixture:   ComponentFixture;
let h1:        HTMLElement;

beforeEach(() => {
  TestBed.configureTestingModule({
    declarations: [ BannerComponent ],
  });
  fixture = TestBed.createComponent(BannerComponent);
  component = fixture.componentInstance; // BannerComponent test instance
  h1 = fixture.nativeElement.querySelector('h1');
});