我正在使用茉莉花測試。我有這個功能： style: string; toggleStyle(style: string, version: string) {    this.style = `mapbox://styles/mapbox/${style}-${version}`;  }和模板： <div class="map-menu-item" (click)="toggleStyle('outdoors', 'v11')" [state]="[true]" menuItemToggle>        <span>          <fa-icon [icon]="faMountain" size="sm" class="pr-2"></fa-icon>Outdoors        </span>      </div>所以我有這個單元測試功能： fit('Should mapbox style when user click on icon', () => {    spyOn(component, 'toggleStyle').and.callThrough();    fixture.debugElement.query(By.css('.map-menu-item')).nativeElement.click();    fixture.detectChanges();    expect(component.toggleStyle).toHaveBeenCalled();  });所以我調用函數：toggleStyle但我仍然收到此錯誤：Expected spy toggleStyle to have been called.當然，我用谷歌搜索了這個錯誤。但是我做了一個 callThrough 并調用了函數。那么我必須改變什么？