How to use the @uipath/angular/testing.Key.ArrowDown function in @uipath/angular

it('should increment positively if DIRECTION is DOWN and NAVIGATING DOWN', () => {
            component.direction = 'down';

            fixture.detectChanges();
            const display = fixture.debugElement.query(By.css('.display'));
            display.nativeElement.dispatchEvent(
                EventGenerator.keyDown(Key.Enter),
            );

            const itemContainer = fixture.debugElement.query(By.css('.item-list-container'));

            itemContainer.nativeElement.dispatchEvent(
                EventGenerator.keyDown(Key.ArrowDown),
            );

            expect(uiSuggest.activeIndex).toEqual(1);
        });