Cfrgtkky

In my component A I have a function that updates the view based on data emitted from component B. I don't want to integrate component B and make an actual even as that's too complex for this test.

I just want to call the function and pass the data to the function. The problem is, sending the data as an 'event' to the function in component A does not seem to work:

  it('should update the video with the data from the edit component', () => {

    let event;

    event.title = 'New Title';

    event.description = 'New Description';

    event.link = 'New Link';

    event.videoCategory = 'New Category';

    event.categories = '2';

    event.a14Only = 0;



    component.updateVideoCard(event);

    fixture.detectChanges();



    expect(component.videoTitle).toBe('New Title');

    expect(component.videoLink).toBe('New Link');

    expect(component.videoDescription).toBe('New Description');

    expect(component.videoCategory).toBe('New Category');

    expect(component.categoryID).toBe('2');

    expect(component.a14Only).toBe('0');

    expect(component.editDisabled).toBeTruthy();

  });

and that event ends up as 'undefined'. I have also tried making it a javascript object called 'event' that has the key-value pairs inside it but that has yielded no luck either.

component.updateEvent(data) code:

updateVideoCard(event) {

    this.videoTitle = event.title;

    this.videoDescription = event.description;

    this.videoLink = event.link;

    this.videoCategory = event.category;

    this.categoryID = event.categories;

    if (event.a14Only === 1) {

      this.a14Only = true;

    } else {

      this.a14Only = false;

    }

    this.enableEditor = false;

    this.notification.done(`${this.videoTitle} updated successfully.`);

  }

I've looked at the DebugElement.triggerEvent but unfortunately the documentation was outdated and haven't had a lot of luck figuring it out by myself how to do it. It also seemed to require integrating the second component anyway.

I ended up integrating the 2 components and just triggering it with a standard JSON object from the second component like this:

describe('VideoCardComponent', () => {

  let component: VideoCardComponent;

  let fixture: ComponentFixture<VideoCardComponent>;

  let fixture2: ComponentFixture<EditVideoComponent>;

  let component2: EditVideoComponent;



  beforeEach(async(() => {

    TestBed.configureTestingModule({

      imports: [

        MatCardModule,

        MatButtonModule,

        BrowserAnimationsModule,

        FontAwesomeModule,

        BrowserModule,

        FlexLayoutModule,

        RouterTestingModule,

        ReactiveFormsModule,

        FormsModule,

        MatSelectModule,

        MatOptionModule,

        MatInputModule,

        MatSlideToggleModule

      ],

      declarations: [VideoCardComponent, SafepipePipe, EditVideoComponent],

      providers: [

        { provide: RestService, useClass: RestStub },

        { provide: NotificationService, useClass: NotificationStub }

      ],

      schemas: [NO_ERRORS_SCHEMA]

    })

      .compileComponents()

      .then(() => {

        fixture2 = TestBed.createComponent(EditVideoComponent);

        fixture = TestBed.createComponent(VideoCardComponent);

        component = fixture.componentInstance;

        component2 = fixture2.componentInstance;

        fixture2.detectChanges();

        fixture.detectChanges();

      });

  }));

You can see I just named it component2 and fixture2 and added the dependecies for both in the same 1 test bed.

I'll probably name them something more relevant instead of component and component2.

The fixed test:

it('should update the video with the data from the edit component', () => {

    const data = [

      {

        title: 'New Title',

        description: 'New Description',

        link: 'New Link',

        category: 'New Category',

        categories: '2',

        a14Only: 0

      }

    ];



    component2.updateVideoCard.subscribe(newVideo => {

      component.updateVideoCard(newVideo);

      expect(component.videoTitle).toBe('New Title');

      expect(component.videoLink).toBe('New Link');

      expect(component.videoDescription).toBe('New Description');

      expect(component.videoCategory).toBe('New Category');

      expect(component.categoryID).toBe('2');

      expect(component.a14Only).toBeFalsy();

      expect(component.editDisabled).toBeFalsy();

    });



    component2.updateLocalVideoData(data);



    fixture2.detectChanges();

    fixture.detectChanges();

  });