用`async`进行角度测试会导致Jasmine超时吗? [英] Angular test with `async` causing Jasmine timeout?

问题描述

我最近将一个项目升级到Angular 6，现在以前运行良好的测试现在失败了.这是其中一个测试的示例:

I recently upgraded a project to Angular 6, and now tests that were working fine before are now failing. Here's an example of one of those tests:

  beforeEach(
    async(() => {
      TestBed.configureTestingModule({
        declarations: [CampaignsDetailScheduleComponent],
        imports: [
          SomeModule,
          ReactiveFormsModule,
          TranslateModule.forRoot({
            loader: { provide: TranslateLoader, useClass: TranslateFakeLoader }
          }),
          StoreModule.forRoot({})
        ],
        providers: [{ provide: ConfigService, useValue: ConfigServiceMock }],
        schemas: [NO_ERRORS_SCHEMA]
      });
      fixture = TestBed.createComponent(CampaignsDetailScheduleComponent);
      comp = fixture.componentInstance; // Component test instance
      _store = fixture.debugElement.injector.get<Store<State>>(Store);
      comp.campaignModel$ = of(CampaignMockData);
      fixture.detectChanges();
    })
  );

it(
    'close edit schedule modal',
    async(() => {
      spyOn(_store, 'dispatch');
      comp.onClose();
      const args = new ShowHideEditScheduleModal(false);
      expect(_store.dispatch).toHaveBeenCalledWith(args);
    })
  );

Angular 6之前，此测试顺利通过.但是现在在Angular 6下，我得到了错误:

Pre-Angular 6, this test passed with no issues. But now under Angular 6, I get the error:

Error: Timeout - Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL.--Pendng async tasks are: [type: macroTask, source: setInterval, args: {handleId:4072,isPeriodic:true,delay:0,args:[object Arguments],__creationTrace__:[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]},type: macroTask, source: setInterval, args: {handleId:4075,isPeriodic:true,delay:0,args:[object Arguments],__creationTrace__:[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]}]

有人知道会发生什么吗?

Does anyone have any idea what might be going on?

推荐答案

在每个块之前使用fakeAsync代替async.

use fakeAsync instead of async in before each block.

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