在使用角度传感器进行测试时,如何触发“ngrx效应”错误

以下是我的效果:

 getAssessmentPeriods$: Observable<Action> = createEffect(() =>
        this.actions$.pipe(
            ofType(courseAttributeActions.getAssessmentPeriod_CR),
            switchMap(() => this.courseAttributeService.getAssessmentPeriods()
                .pipe(
                    map((value: any) => {
                        return courseAttributeActions.getAssessmentPeriodSuccess_CR({ payload: value });
                    }),
                    catchError(error => of(courseAttributeActions.LoadFailure_CR(error)))
                ))
        ));

规范文件:快乐场景运行良好:

it('should return a cold observable of getAssessmentPeriodSuccess_CR', () => {

        const fakeData: any = [];

        const start = courseAttributeActions.getAssessmentPeriod_CR();
        const completion = courseAttributeActions.getAssessmentPeriodSuccess_CR({ payload: fakeData });

        jest.spyOn(service, 'getAssessmentPeriods').mockImplementation(() => of(fakeData));

        actions = hot('--a-', { a: start });
        const expected = cold('--(b)', { b: completion });

        expect(effects.getAssessmentPeriods$).toBeObservable(expected);

    });

规范文件:错误情况不起作用:

 it('should return a cold observable of LoadFailure_CR error ', () => {

        const errors: any = throwError((new Error('Network error')));

        const start = courseAttributeActions.getAssessmentPeriod_CR();
        const completionError = courseAttributeActions.LoadFailure_CR({error:errors});

        jest.spyOn(service, 'getAssessmentPeriods').mockImplementation(() => of(errors));

        actions = hot('--a-', { a: start });
        const expected = cold('--(b)', { b: completionError });

        expect(effects.getAssessmentPeriods$).toBeObservable(expected);

    });

在错误场景中如何触发 error 在服务?事实上,我是从间谍那里发来的。但我仍然收到了成功的信息。

控制台中出现错误,例如:

- Expected
    + Received

    @@ -4,14 +4,14 @@
          "notification": Notification {
            "error": undefined,
            "hasValue": true,
            "kind": "N",
            "value": Object {
    -         "error": Observable {
    +         "payload": Observable {
                "_isScalar": false,
                "_subscribe": [Function anonymous],
              },
    -         "type": "[candidate-registration-management] LoadFailure_CR",
    +         "type": "[candidate-registration-management_CR] getAssessmentPeriodSuccess",
            },
          },
        },
      ]

      69 |         const expected = cold('--(b)', { b: completionError });
      70 |
    > 71 |         expect(effects.getAssessmentPeriods$).toBeObservable(expected);

如何修复错误?真的需要为1个效果编写2个单独的“it”函数吗? 寻求帮助。提前感谢。