如何为接收路由器出口的方法单元测试角度动画？

Question

我正在为Angular 7应用程序设置UT（使用茉莉花），以测试基于当前路线动画属性使用角度动画效果的方法。

我什至没有为茉莉花定义

//#region ANGULAR 7 SOURCE CODE
getAnimationEffect(outlet: RouterOutlet): string {
    let currentAnimationEffect = '';
    if (outlet && outlet.activatedRouteData) {
      if (outlet.activatedRouteData['moduleIndex'] &&
          outlet.activatedRouteData['moduleIndex'] > 0 &&
          outlet.activatedRouteData['moduleIndex'] !== this.currentModuleIndex) {
        this.currentModuleIndex = _.cloneDeep(outlet.activatedRouteData['moduleIndex']);
        currentAnimationEffect = 'isModuleLanding';
      } else {
        currentAnimationEffect = outlet.activatedRouteData['animation'];
      }
    } else {
      currentAnimationEffect = 'isModuleLanding';
    }

    return currentAnimationEffect;
  }
//#endregion

//#region ANGULAR 7 UT
describe('testing routing stuff', () => {
  const testRoutes: Routes = [
    {
      path: 'module',
      data: { title: 'Module', moduleIndex: 1 }
    },
    {
      path: 'tab',
      data: { title: 'Module -> Tab', animation: 'tabLanding', moduleIndex: 1 }
    },
    {
      path: 'detail',
      data: { title: 'Module -> Tab -> Detail', animation: 'detailLanding', moduleIndex: 1 }
    }
  ];

beforeEach(async(() => {

    TestBed.configureTestingModule({
      imports: [ RouterTestingModule.withRoutes(testRoutes) ],
      ...
    })
    .compileComponents();
  }));
});

  it('should get the animation effect that correspond to the current active route',
     async(() => {

      // Provoke navigation end to route 'module/tab/detail'
      const event = new NavigationEnd(666, '/module/tab', '/module/tab/detail');
      TestBed.get(Router).events.next(event);

      // Get response to current active route animation effect that correspond to this route
      const testAnimationEffect = componentBaseView.getAnimationEffect(<IDontKnowHowToDefineAParamHere>)

      // Assert
      expect(testAnimationEffect).toEqual('detailLadning');
    })
  );

});
//#endregion

我希望能够在当前激活的路由器的tab / x / details返回“ detailLanding”时测试该动画效果。

我不知道该如何设置，也无法找到任何方法可以在其中接收路由器出口的测试。

这里有什么想法吗？