使用beforeAll而不是beforeEach优化测试的玩笑

Question

我正在编写测试以检查子组件发出一些数据时是否调用了父组件，这是我设置测试组件的方法：

  describe('OperationComponent', () => {
  let component: OperationComponent;
  let fixture: ComponentFixture<OperationComponent>;
  let store: Store;
  let de: DebugElement;
  let data: any;
  let cmp: any;
  beforeEach(async(() => {
    const {
      imports,
      providers
    } = configureDefaultTestingMouduleForSecureComponent(OperationComponent);
    TestBed.resetTestingModule();
    TestBed.configureTestingModule({
      declarations: [OperationComponent],
      imports: [...imports, NgxsModule.forFeature([RoutesOperationState])],
      providers: [...providers, RoutesOperationEntity]
    }).compileComponents();
    store = TestBed.get(Store);
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(OperationComponent);
    component = fixture.componentInstance;
    de = fixture.debugElement;
    data = de.query(By.directive(RouteOperationsComponent));
    cmp = data.componentInstance;
    component.routeId = mockRoutes[0].id;
  });
describe('cancel action', () => {
      it('should be called on cancelOperation when it emits data', () => {
        jest.spyOn(component, 'handleCancelRouteOperation');
        cmp.cancelRouteOperation.emit(true);
        expect(component.handleCancelRouteOperation).toHaveBeenCalledWith(true);
      });
    });

configureDefaultTestingMouduleForSecureComponent()具有我的共享模块和其他角度模块。我想使用beforeAll()而不是beforeEach()，因为使用beforeEach()会使我的测试套件变慢。但是，当我使用beforeAll()时，我的子组件RoureOperationsComponent无法正确实例化，并且会引发错误。

expect(spy).toHaveBeenCalledWith(...expected)

    Expected: true

    Number of calls: 0