ComponentFixture

  
    abstract class ComponentFixture<T> {  debugElement: DebugElement;  componentInstance: T;  nativeElement: any;  elementRef: ElementRef<any>;  changeDetectorRef: ChangeDetectorRef;  ngZone: NgZone;  override componentRef: ComponentRef<T>;  abstract detectChanges(checkNoChanges?: boolean): void;  checkNoChanges(): void;  abstract autoDetectChanges(autoDetect?: boolean): void;  isStable(): boolean;  whenStable(): Promise<any>;  getDeferBlocks(): Promise<DeferBlockFixture[]>;  whenRenderingDone(): Promise<any>;  destroy(): void;}