How to use the @nebular/theme/components/cdk/overlay/overlay-position.NbAdjustment.NOOP function in @nebular/theme

it('should create strategy with position end and adjustment noop', () => {
    const withPositionsSpy = spyOn(strategy, 'withPositions').and.callThrough();

    strategy.position(NbPosition.END).adjustment(NbAdjustment.NOOP);

    const overlayService: NbOverlayService = TestBed.get(NbOverlayService);
    const overlayRef = overlayService.create({ positionStrategy: strategy });
    overlayRef.attach(new NbComponentPortal(PortalComponent));

    expect(withPositionsSpy).toHaveBeenCalledTimes(1);
    expect(withPositionsSpy).toHaveBeenCalledWith(jasmine.objectContaining([{
      originX: 'end',
      originY: 'center',
      overlayX: 'start',
      overlayY: 'center',
      offsetX: 15,
    }]));
  });