Question

我有一个Angular 8应用程序，它使用路由器在一些主要组件之间进行切换。现在，我已经进行了一些单元测试，有时测试全部通过，但是有时一两个失败，并且总是有相同的原因。

这是我通过执行ng test（测试失败时）获得的输出：

Chrome 80.0.3987 (Windows 10.0.0): Executed 32 of 34 ERROR (0 secs / 0.819 secs)
Chrome 80.0.3987 (Windows 10.0.0) ERROR
  An error was thrown in afterAll
  Uncaught Error: Uncaught (in promise): Error: Cannot match any routes. URL Segment: 'overview'
  Error: Cannot match any routes. URL Segment: 'overview'
      at ApplyRedirects.noMatchError (http://localhost:9876/_karma_webpack_/node_modules/@angular/router/fesm2015/router.js:4295:1)
      at CatchSubscriber.selector (http://localhost:9876/_karma_webpack_/node_modules/@angular/router/fesm2015/router.js:4259:1)
      at CatchSubscriber.error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/operators/catchError.js:29:1)
      at MapSubscriber._error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/Subscriber.js:75:1)
      at MapSubscriber.error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/Subscriber.js:55:1)
      at MapSubscriber._error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/Subscriber.js:75:1)
      at MapSubscriber.error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/Subscriber.js:55:1)
      at MapSubscriber._error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/Subscriber.js:75:1)
      at MapSubscriber.error (http://localhost:9876/_karma_webpack_/node_modules/rxjs/_esm2015/internal/Subscriber.js:55:1)
Chrome 80.0.3987 (Windows 10.0.0): Executed 34 of 34 ERROR (1.167 secs / 0.907 secs)

我在每个测试文件的imports数组中都包含了 RouterTestingModule ，其中相应的组件以任何方式使用路由器。例如：

describe('FeedbackComponent', () => {
  let component: FeedbackComponent;
  let fixture: ComponentFixture<FeedbackComponent>;

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      declarations: [ FeedbackComponent, OverviewHeaderComponent ],
      imports: [FormsModule, RouterTestingModule, HttpClientTestingModule]
    })
    .compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(FeedbackComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();
  });

有人遇到过此类问题吗？还是知道为什么这是随机失败的？已经非常感谢您：）

Answer 1

尝试做：

RouterTestingModule.withRoutes(
        [{path: 'overview', component: FeedbackComponent}]
      )

真的，FeedbackComponent可以是您创建的任何虚拟组件。这可能会解决您的问题，但是我不确定它将如何扩展。看来您有更大的潜在问题。我看到错误发生在afterAll中，您是否有afterAll个钩子？他们有什么有趣的事吗？

Angular-单元测试偶尔失败（路由器）

1 个答案: