angular - ng テスト テンプレート解析エラー 'ngb-carousel' は既知の要素ではありません

Answer 1

これを機能させるには、アプリコンポーネントの仕様を変更して含める必要があり、この回答で、一部のテストから async() 呼び出しを削除する必要があることNgbModuleを学びました

これは app.component.spec.ts の仕様です

/* tslint:disable:no-unused-variable */

import { TestBed, async } from '@angular/core/testing';
import { AppComponent } from './app.component';

import { NgbModule } from '@ng-bootstrap/ng-bootstrap';

import { MyCarouselComponent } from './my-carousel/my-carousel.component';

describe('AppComponent', () => {
  beforeEach(() => {
    TestBed.configureTestingModule({
      declarations: [
        AppComponent,
        MyCarouselComponent
      ],
      imports: [
        NgbModule.forRoot()
      ]
    });
    TestBed.compileComponents();
  });

  it('should create the app', async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElement.componentInstance;
    expect(app).toBeTruthy();
  }));

  it(`should have as title 'app works!'`, async(() => {
    let fixture = TestBed.createComponent(AppComponent);
    let app = fixture.debugElement.componentInstance;
    expect(app.title).toEqual('app works!');
  }));

  it('should render title in a h1 tag', () => {
    let fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    let compiled = fixture.debugElement.nativeElement;
    let qry = compiled.querySelector('h1').textContent
    expect(qry).toContain('app works!');
  });

  it('should render the carousel component', () => {
    let fixture = TestBed.createComponent(AppComponent);
    fixture.detectChanges();
    let compiled = fixture.debugElement.nativeElement;
    let qry = compiled.querySelector('app-my-carousel').textContent;
    expect(qry).not.toBeNull();
  });
});