[英]RouteLink testing angular2
我正在测试使用RouteLink指令的Component,如下所示:
let comp: AppComponent;
let fixture: ComponentFixture<AppComponent>;
let el: DebugElement;
let injector: Injector;
let languageService: TranslateService;
let location: Location;
let backend: MockBackend;
let connection: MockConnection; // this will be set when a new connection is emitted from the backend.
let mockRouter: any;
let mockActivatedRoute: any;
const mockBackendResponse = (connection: MockConnection, response: string) => {
connection.mockRespond(new Response(new ResponseOptions({ body: response })));
};
describe('testComponent', () => {
beforeEach(() => {
TestBed.configureTestingModule({
declarations: [AppComponent],
imports: [HttpModule, RouterTestingModule, TranslateModule.forRoot({
provide: TranslateLoader,
useFactory: (http: Http) => new TranslateStaticLoader(http, './assets/language', '.json'),
deps: [Http]
})],
providers: [
{ provide: LanguageService, useClass: LanguageService },
{ provide: BackendLocatorService, useClass: BackendLocatorService },
{ provide: XHRBackend, useClass: MockBackend },
{ provide: APP_BASE_HREF, useValue: '/' }
]
});
injector = getTestBed();
backend = injector.get(XHRBackend);
languageService = injector.get(TranslateService);
location = injector.get(Location);
backend.connections.subscribe((c: MockConnection) => connection = c);
fixture = TestBed.createComponent(AppComponent);
comp = fixture.componentInstance; // BannerComponent test instance
// get title DebugElement by element name
});
it('is defined', () => {
expect(TranslateService).toBeDefined();
expect(languageService).toBeDefined();
expect(languageService instanceof TranslateService).toBeTruthy();
});
it('ROUTLINK CLICK', () => {
fixture.detectChanges();
let links = fixture.nativeElement.querySelectorAll('a');
links[1].click();
console.log(links[0]);
expect(location.path()).toBe('/home');
});
});
我尝试获取<a>
标记并单击它以获取当前路径,但问题是当前路径始终为'',什么也没有:(这是错误:
Chrome 53.0.2785 (Windows 7 0.0.0) testComponent ROUTLINK CLICK FAILED
Expected '' to be '/home'.
任何想法 ?
因此,您遇到了一个当前错误,并且在解决了该错误之后,还会收到另一个错误。
当前错误的Expected '' to be '/home'
是因为锚点上的click()
涉及异步事件处理。 但是您的期望是同步的,并且发生在click()
之后,异步操作完成之前。
要解决此问题,您可以使测试async
,然后在click()
,可以通过调用fixture.whenStable()
等待异步操作。
import { async } from '@angular/core/testing';
// use async
it('ROUTLINK CLICK', async(() => {
fixture.detectChanges();
let links = fixture.nativeElement.querySelectorAll('a');
links[1].click();
fixture.whenStable().then(() => {
expect(location.path()).toBe('/home');
});
}));
解决此问题后,您将遇到另一个问题。 当前,您尚未为RouterTestingModule
配置任何路由。 通过调用RouterTestingModule.withRoutes(Routes)
。 您可以使用实际的应用程序路由,也可以根据需要设置一些虚假路由进行测试。 参见示例 。
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