对象不支持在\u ActivatedRoute\u 58上执行此操作

我在Angular 2中使用Jasmin和Karma进行单元测试。

我需要模拟下面的代码

this.activatedRoute.url.subscribe(url => {
            debugger;
            this.isEdit = false;
            if (url[0].path === 'updatecoc') {
                this.isEdit = true;
            }
        });

我试过这样嘲笑: How to mock an activatedRoute parent Route in angular2 for testing purposes?

let fakeActivatedRoute = new MockActivatedRoute();
    fakeActivatedRoute.parent = new MockActivatedRoute();

    let urlSegment: UrlSegment[] = [];
    urlSegment.push({ path: "updatecoc", parameters: {} });
    fakeActivatedRoute.url = Observable.of(urlSegment);    
    beforeEach(() => {    
        TestBed.configureTestingModule({

            imports: [FormsModule, MessagesModule, DataTableModule, DropdownModule, ConfirmDialogModule, AccordionModule,
                AutoCompleteModule, DialogModule, EditorModule, HttpModule],
            declarations: [MaintainCOCComponent],
            providers: [{ provide: MaintainCOCService, useClass: MaintainCOCService },
            { provide: Configuration, useClass: Configuration },
            { provide: Router, useClass: MockRouter },
            { provide: ActivatedRoute, useClass: fakeActivatedRoute }];

但我在嘲笑时出错了 ActivatedRoute 单元从两天开始,我什么都试过了。我无法解决这个问题。

完整错误消息为:

Object doesn't support this action
   at _ActivatedRoute_58.get (Function code:173:46)
   at DynamicTestModuleInjector.prototype.getInternal (Function code:281:43)
   at NgModuleInjector.prototype.get (http://localhost:9876/base/src/test.ts:60528:9)
   at TestBed.prototype.get (http://localhost:9876/base/src/test.ts:17440:13)
   at AppView.prototype.injectorGet (http://localhost:9876/base/src/test.ts:89000:17)
   at DebugAppView.prototype.injectorGet (http://localhost:9876/base/src/test.ts:89428:13)
   at View_MaintainCOCComponent_Host0.prototype.createInternal (Function code:20:3)
   at AppView.prototype.createHostView (http://localhost:9876/base/src/test.ts:88956:9)
   at DebugAppView.prototype.createHostView (http://localhost:9876/base/src/test.ts:89412:13)
   at ComponentFactory.prototype.create (http://localhost:9876/base/src/test.ts:44498:9)

注: 我应该悬赏给你一个有决心的答案。