Testing presentables

code.ts

const modal = this._modal.create(CommunicationAddNoteModalComponent);
modal.onDidDismiss((data: { note: string }) => {
  this.note = data.note;
});
modal.present();

presentable.mock.ts

export class PresentableControllerMock {
  public presentableRef = {
    present: () => Promise.resolve(),
    dismiss: (data?: any) => {
      if (this.dismissCallbackFn) {
        this.dismissCallbackFn(data);
      }
      return Promise.resolve({});
    },
    onDidDismiss: (fn) => {
      this.dismissCallbackFn = fn;
    }
  };

  public dismissCallbackFn = null;

  public create(options?) {
    return Object.assign(this.presentableRef, options);
  }
}

test.ts

  it('updates the contact note if it is edited', function () {
    const modalCtrl = fixture.debugElement.injector.get(ModalController);
    spyOn(modalCtrl, 'create').and.callThrough();
    const modal = (<PresentableControllerMock>(<any>modalCtrl)).presentableRef;
    spyOn(modal, 'present').and.callThrough();

    sut.method();

    expect(modal.present).toHaveBeenCalled();
    modal.dismiss({ note: 'new note' });
      
    expect(sut.notes).toEqual('new note');
  });