How to unit test a router in Angular2 RC5?

Question

Below is my AppComponent code:

import { Component } from '@angular/core';

@Component({
  selector: 'demo-app',
  template: `<h1>Angular 2 app</h1>
    <a [routerLink]="['/']">Home</a>
    <a [routerLink]="['/about']">About</a>
    <a [routerLink] = "['/login']">sign in</a>
    <div class="outer-outlet">
      <router-outlet></router-outlet>
    </div>
  `
})
export class AppComponent { }

I tried searching on google, but I only found testing the router in a lower version of angular <5. Any help is appreciated.