我仍在尝试找出角度测试,而我正在为失败的测试而苦苦挣扎。当我使用ng-test
运行测试时,Chrome输出显示以下错误:
CustomerComponent should create
[object ErrorEvent] thrown
这是控制台内容:
zone.js:192 Uncaught TypeError: _this.handler.handle is not a function
at MergeMapSubscriber.project (:9876/_karma_webpack_/webpack:/node_modules/@angular/common/fesm5/http.js:974)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._tryNext (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/operators/mergeMap.js:60)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._next (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/operators/mergeMap.js:50)
at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/Subscriber.js:54)
at Observable._subscribe (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/observable/scalar.js:5)
at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable._trySubscribe (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/Observable.js:42)
at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable.subscribe (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/Observable.js:28)
at MergeMapOperator.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapOperator.call (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/operators/mergeMap.js:28)
at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable.subscribe (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/Observable.js:23)
at FilterOperator.push../node_modules/rxjs/_esm5/internal/operators/filter.js.FilterOperator.call (:9876/_karma_webpack_/webpack:/node_modules/rxjs/_esm5/internal/operators/filter.js:15)
at ____________________Elapsed_12_ms__At__Mon_Oct_22_2018_15_18_53_GMT_0200__heure_d__t__d_Europe_centrale_ ()
at Object.onScheduleTask (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone-testing.js:108)
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:401)
at Object.onScheduleTask (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:297)
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.scheduleTask (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:401)
at Zone.push../node_modules/zone.js/dist/zone.js.Zone.scheduleTask (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:232)
at Zone.push../node_modules/zone.js/dist/zone.js.Zone.scheduleMacroTask (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:255)
at scheduleMacroTaskWithCurrentZone (:9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:1114)
at :9876/_karma_webpack_/webpack:/node_modules/zone.js/dist/zone.js:2090
测试文件是...嗯,我想您可以找到最基本的文件。
class MockCustomerService {
public addUserInformations(): Observable<Customer> {
return of(new Customer());
}
public updateCustomerInformations(): Observable<Customer> {
return of(new Customer());
}
}
export class PartialTranslateServiceStub {
addLangs(langs: Array<string>): void { }
instant (key: string): any { }
}
describe('CustomerComponent', () => {
let component: CustomerComponent;
let fixture: ComponentFixture<CustomerComponent>;
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [CustomerComponent, ModalComponent, SecondComponent],
providers: [FormBuilder, ConfigurationService,
{ provide: TranslateService, useClass: PartialTranslateServiceStub },
{ provide: CustomerService, useClass: MockCustomerService }
],
imports: [FormsModule, ReactiveFormsModule, RouterTestingModule, TranslateModule.forRoot()]
})
.compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(CustomerComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
it('should create', () => {
expect(component).toBeTruthy();
});
});
我看到大多数答案是向订户添加一个错误处理程序,但这已经完成了。
此外,我尝试从头开始重新制作该组件,然后...创建新组件时,失败的测试成功进行。卸下组件会使测试再次失败。
备注:如果我评论失败的测试,则问题将移至下一个测试。奇怪。
答案 0 :(得分:1)
问题解决了。
在失败的测试之前运行的测试未正确完成,因此影响了以下测试。似乎问题出在没有适当模拟的提供程序上:例如,代替MockPreviousService
而不是PreviousService
,DependencyOne
,DependencyTwo
。在测试用例中它是没有用的,因此摆脱声明并模拟服务就可以了。
答案 1 :(得分:0)
您的问题似乎来自mergeMap。我的猜测是TranslateLoader是元凶。
您为什么在测试中使用真实的东西?我建议像这样创建TranslateModule的存根:
export class PartialTranslateServiceStub {
addLangs(langs: Array<string>): void { }
instant (key: string): any { }
}
,然后在测试中删除转换模块,并使用提供程序的存根:
providers: [FormBuilder, CustomerService, ConfigurationService,
{provide: TranslateService, useClass: TranslateServiceStub},
ApiRequestService, AppConfig, HttpClient, HttpHandler],
imports: [FormsModule, ReactiveFormsModule, RouterTestingModule]