[英]How to mock ResizeObserver polyfill in angular, when doing unit tests with jest?
[英]Mock Idle in Angular 4 Unit tests
在此之后,我嘗試使用 karma 為 Angular4 應用程序編寫單元測試我在TestBed.createComponent(ServicesComponent)
處收到錯誤,因此沒有執行任何測試用例,並且
TypeError: this.expiry.last is not a function at Idle.Array.concat.Idle.watch...
在構造函數中編寫了很多東西(其中進行了服務調用並編寫了空閑功能),應該如何為此編寫測試用例?
這是我的規范文件,在組件的構造函數中使用了空閑函數,我必須添加IdleExpiry
和Keepalive
提供程序,以免出現Error: No provider for IdleExpiry
beforeEach(async(() => {
TestBed.configureTestingModule({
declarations: [
ServicesComponent
],
providers: [
{ provide: ServicesService, useClass: ServicesService },
{ provide: LocalStorageService, useClass: MockLocalStorageService },
{ provide: ServiceUtilities, useClass: ServiceUtilities },
{ provide: Idle, useClass: Idle },
{ provide: IdleExpiry, useClass: IdleExpiry },
{ provide: Keepalive, useClass: Keepalive },
{ provide: Router, useValue: routerStub },
{ provide: ActivatedRoute, useValue: activatedrouteStub },
MockBackend,
BaseRequestOptions,
{
provide: Http,
useFactory: (backend, options) => new Http(backend, options),
deps: [MockBackend, BaseRequestOptions]
}
],
imports: [
ModalModule.forRoot()
]
}).compileComponents();
}));
beforeEach(() => {
fixture = TestBed.createComponent(ServicesComponent);
component = fixture.componentInstance;
fixture.detectChanges();
});
組件(不包括不必要的細節(替換為...))
export class ServicesComponent {
...
approxWaitingTime: string;
idleState = 'Not started.';
timedOut = false;
lastPing?: Date = null;
@ViewChild('autoShownModal') public autoShownModal: ModalDirective;
public isModalShown:boolean = false;
timer: any;
constructor(private servicesService: ServicesService, private route: ActivatedRoute, private router: Router, private idle: Idle, private keepalive: Keepalive) {
this.servicesService.getServices(this.centerId).subscribe(data => { ... });
this.servicesService.getCategories(this.centerId).subscribe(data => { ... });
this.servicesService.getStylists(this.centerId).subscribe(data => { ... });
this.servicesService.getApproxWaitingTime(this.centerId).subscribe(data => { ... });
this.route.queryParams.subscribe(params => { ... });
// sets an idle timeout of 120 seconds, for testing purposes.
idle.setIdle(10);
// sets a timeout period of 30 seconds. after 30 seconds of inactivity, the user will be considered timed out.
idle.setTimeout(5);
// sets the default interrupts, in this case, things like clicks, scrolls, touches to the document
idle.setInterrupts(DEFAULT_INTERRUPTSOURCES);
idle.onIdleEnd.subscribe(() => this.idleState = 'No longer idle.');
idle.onTimeout.subscribe(() => {
console.log("ontimeout");
this.idleState = 'Timed out!';
this.timedOut = true;
});
idle.onIdleStart.subscribe(() => this.idleState = 'You\'ve gone idle!');
idle.onTimeoutWarning.subscribe((countdown, router, autoShownModal) => {
console.log("time out" + countdown);
this.isModalShown = true;
this.timer = setTimeout(function () { if (this.isModalShown) { this.hideModal(); } this.reset(); this.router.navigate(['']); }.bind(this), 3000);
this.reset();
});
// sets the ping interval to 15 seconds
keepalive.interval(10);
keepalive.onPing.subscribe(() => { this.lastPing = new Date(); console.log('Keepalive.ping() called!'); });
this.reset();
}
...
我缺什么嗎?
這是我為使組件加載所做的工作,Mocked IdleExpiry
export class MockExpiry extends IdleExpiry {
public lastDate: Date;
public mockNow: Date;
last(value?: Date): Date {
if (value !== void 0) {
this.lastDate = value;
}
return this.lastDate;
}
now(): Date {
return this.mockNow || new Date();
}
}
更新了規范
providers: [
...
{ provide: IdleExpiry, useClass: MockExpiry },
...
],
正確的解決方案是將NgIdleKeepaliveModule
添加到NgIdleKeepaliveModule
的imports
中。
我還建議不要在模擬中擴展您正在模擬的類(然而,實現並不是一個壞主意)。
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