fix(router): add an app initializer to trigger initial navigation

Closes #10

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

@@ -3,7 +3,7 @@ import { UrlSerializer, DefaultUrlSerializer } from './url_serializer';
 import { ActivatedRoute } from './router_state';
 import { Router } from './router';
 import { RouterConfig } from './config';
-import { ComponentResolver, ApplicationRef, Injector } from '@angular/core';
+import { ComponentResolver, ApplicationRef, Injector, APP_INITIALIZER } from '@angular/core';
 import { LocationStrategy, PathLocationStrategy, Location } from '@angular/common';
 
 /**
@@ -46,5 +46,8 @@ export function provideRouter(config: RouterConfig):any[] {
 
     RouterOutletMap,
     {provide: ActivatedRoute, useFactory: (r) => r.routerState.root, deps: [Router]},
+    
+    // Trigger initial navigation
+    {provide: APP_INITIALIZER, multi: true, useFactory: (router: Router) => router.initialNavigation(), deps: [Router]},
   ];
 }

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

@@ -63,8 +63,14 @@ export class Router {
    */
   constructor(private rootComponentType:Type, private resolver: ComponentResolver, private urlSerializer: UrlSerializer, private outletMap: RouterOutletMap, private location: Location, private injector: Injector, private config: RouterConfig) {
     this.routerEvents = new Subject<Event>();
-    this.currentUrlTree = createEmptyUrlTree();
-    this.currentRouterState = createEmptyState(rootComponentType);
+    this.currentUrlTree = createEmptyUrlTree()
+    this.currentRouterState = createEmptyState(this.rootComponentType);
+  }
+
+  /**
+   * @internal
+   */
+  initialNavigation():void {
     this.setUpLocationChangeListener();
     this.navigateByUrl(this.location.path());
   }

modules/@angular/router/test/router.spec.ts

@@ -307,7 +307,7 @@ describe("Integration", () => {
         [NavigationEnd, '/user/fedor']
       ]);
     })));
-
+  
   describe("router links", () => {
     it("should support string router links",
       fakeAsync(inject([Router, TestComponentBuilder], (router, tcb) => {