测试中如果不关心真实的路由跳转，可以使用mock
let mockRouter = {
navigate: jasmine.createSpy('navigate')
}
TestBed.configureTestingModule({
providers: [
{ provide: Router, useValue: mockRouter }
]
})
在测试中可能只是想要确认navigate被调用，可以这样：
expect(mockRouter.navigate).toHaveBeenCalledWith(['/router']);
如果想要测试真实导航，可以使用RouterTestingModule,添加所有的路由providers和directives
import { RouterTestingModule } from '@angular/router/testing';
TestBed.configureTestingModule({
imports: [
RouterTestingModule.withRoutes([{path: '', component: BlankCmp}, {path: 'simple', component: SimpleCmp}])
]
})
参考：# Angular 2 Unit testing: Can't resolve all parameters for Router
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