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

import { CanvasComponent } from './canvas.component';

describe('CanvasComponent', () => {
  beforeEach(async () => {
    await TestBed
        .configureTestingModule({
          declarations: [CanvasComponent],
        })
        .compileComponents();
  });

  it('should be able to generate blob data from canvas', fakeAsync(() => {
       const fixture = TestBed.createComponent(CanvasComponent);
       const canvasComp = fixture.componentInstance;

       fixture.detectChanges();
       expect(canvasComp.blobSize).toBe(0);

       tick();
       expect(canvasComp.blobSize).toBeGreaterThan(0);
     }));
});

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

import { BannerComponent } from './banner.component';

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

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

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

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

TestBed
    .configureTestingModule({declarations: [DashboardHeroComponent, TestHostComponent]})
// create TestHostComponent instead of DashboardHeroComponent
fixture = TestBed.createComponent(TestHostComponent);
testHost = fixture.componentInstance;
heroEl = fixture.nativeElement.querySelector('.hero');
fixture.detectChanges();  // trigger initial data binding

TestBed
    .configureTestingModule({declarations: [DashboardHeroComponent]})
fixture = TestBed.createComponent(DashboardHeroComponent);
comp = fixture.componentInstance;

// find the hero's DebugElement and element
heroDe = fixture.debugElement.query(By.css('.hero'));
heroEl = heroDe.nativeElement;

// mock the hero supplied by the parent component
expectedHero = {id: 42, name: 'Test Name'};

// simulate the parent setting the input property with that hero
comp.hero = expectedHero;

// trigger initial data binding
fixture.detectChanges();

TestBed.configureTestingModule({
  declarations: [AppComponent, BookListComponent, BookCollectionComponent],
  imports: [
    HttpClientTestingModule,
    StoreModule.forRoot({
      books: booksReducer,
      collection: collectionReducer,
    }),
  ],
  providers: [GoogleBooksService],
}).compileComponents();
 
fixture = TestBed.createComponent(AppComponent);
component = fixture.debugElement.componentInstance;
 
fixture.detectChanges();