test(router): add a test checking that guards work for child routes

modules/@angular/router/src/directives/router_link.ts

@@ -1,5 +1,5 @@
-import {Directive, HostBinding, HostListener, Input, OnChanges} from '@angular/core';
 import {LocationStrategy} from '@angular/common';
+import {Directive, HostBinding, HostListener, Input, OnChanges} from '@angular/core';
 
 import {Router} from '../router';
 import {ActivatedRoute} from '../router_state';
@@ -47,7 +47,9 @@ export class RouterLink implements OnChanges {
   /**
    * @internal
    */
-  constructor(private router: Router, private route: ActivatedRoute, private locationStrategy: LocationStrategy) {}
+  constructor(
+      private router: Router, private route: ActivatedRoute,
+      private locationStrategy: LocationStrategy) {}
 
   @Input()
   set routerLink(data: any[]|string) {
@@ -60,7 +62,7 @@ export class RouterLink implements OnChanges {
 
   ngOnChanges(changes: {}): any { this.updateTargetUrlAndHref(); }
 
-  @HostListener("click", ["$event.button", "$event.ctrlKey", "$event.metaKey"])
+  @HostListener('click', ['$event.button', '$event.ctrlKey', '$event.metaKey'])
   onClick(button: number, ctrlKey: boolean, metaKey: boolean): boolean {
     if (button !== 0 || ctrlKey || metaKey) {
       return true;

modules/@angular/router/src/router.ts

@@ -345,6 +345,7 @@ class GuardChecks {
     const currRoot = this.curr ? this.curr._root : null;
     this.traverseChildRoutes(futureRoot, currRoot, parentOutletMap);
     if (this.checks.length === 0) return of (true);
+
     return Observable.from(this.checks)
         .map(s => {
           if (s instanceof CanActivate) {