message: Mock SlideshowModule in component
diff: @@ -4,18 +4,24 @@ import { HttpClientTestingModule } from '@angular/common/http/testing'
  import { AboutComponent } from './about.component'
  -xdescribe('AboutComponent', () => {
  +describe('AboutComponent', () => {
  let component: AboutComponent
  let fixture: ComponentFixture<AboutComponent>
  + let slideshowModule
  beforeEach(async(() => {
  + slideshowModule = jasmine.createSpyObj('SlideshowModule', ['height', 'autoPlay', 'showArrows', 'showDots', 'imageUrls'])
  +
  TestBed.configureTestingModule({
  imports: [
  HttpClientTestingModule,
  SlideshowModule
  ],
  - declarations: [ AboutComponent ]
  + declarations: [ AboutComponent ],
  + providers: [
  + { provide: SlideshowModule, useValue: slideshowModule }
  + ]
  })
  .compileComponents()
  }))
  