banner-component.spec.ts

// ...
describe('BannerComponent (inline template)', () => {
  let comp:    BannerComponent;
  let fixture: ComponentFixture<BannerComponent>;

  setupTestBed({
    declarations: [ BannerComponent ], // declare the test component
  });

  beforeEach(() => {
    fixture = TestBed.createComponent(BannerComponent);

    comp = fixture.componentInstance; // BannerComponent test instance
    // ...
  });
});