Angular 2:使用路由器测试组件

Angular 2: Testing components with router

我正在编写使用 routeLink 的最简单的组件:

@Component({
    selector: 'memorySnippet',
    templateUrl: '<div class="memory-snippet-wrapper" *ngIf="memory" 
                  [routerLink]="['MainPanel', 'MemoryPanel', {'id' : this.memory.id}]">',
    directives: [CORE_DIRECTIVES, ROUTER_DIRECTIVES]
})
export class MemorySnippetComponent {
    @Input() memory: Memory;
}

当我尝试测试此组件时出现问题。我添加路由器的那一刻 link Karma 抱怨缺少提供者:

添加 Karma 要求的所有供应商后,我得到了这个:

beforeEachProviders(() => [
    MemorySnippetComponent,
    MEMORY_SERVICE_PROVIDERS,
    ROUTER_PROVIDERS,
    ApplicationRef
]);

但是当我 运行 测试时我得到这个错误:

EXCEPTION: EXCEPTION: Error during instantiation of Token RouterPrimaryComponent! (RouterLink -> Router -> RouteRegistry -> Token RouterPrimaryComponent).

ORIGINAL EXCEPTION: unimplemented

ORIGINAL STACKTRACE: Error: unimplemented

我做错了什么??? Angular 2 (2.0.0-beta.1) 是否还没有准备好使用路由器指令测试组件?

您应该有一个 beforeEachProviders 方法,如下所示:

import {MockApplicationRef} from '@angular/core/testing';

beforeEachProviders(() => [
  ROUTER_PROVIDERS,
  provide(APP_BASE_HREF, {useValue: '/'}),
  provide(ROUTER_PRIMARY_COMPONENT, {useValue: YourComponent}),
  provide(ApplicationRef, {useClass: MockApplicationRef}
]);

MockApplicationRef 由框架提供,用于此类测试。

对于带有新路由器的 RC4,现在使用 ...

beforeEach(() => addProviders([
  APP_ROUTER_PROVIDERS, // must be first
  {provide: APP_BASE_HREF, useValue: '/'}, // must be second
  {provide: ActivatedRoute, useClass: Mock},
  {provide: Router, useClass: Mock}
]));

使用这种方法的一个 github 项目是...

https://github.com/danday74/angular2-coverage