Revert "fix(router): navigating to the current location works (#19463)"

This reverts commit b67d574a95.

packages/common/testing/src/location_mock.ts

@@ -41,9 +41,7 @@ export class SpyLocation implements Location {
     return currPath == givenPath + (query.length > 0 ? ('?' + query) : '');
   }
 
-  simulateUrlPop(pathname: string) {
+  simulateUrlPop(pathname: string) { this._subject.emit({'url': pathname, 'pop': true}); }
-    this._subject.emit({'url': pathname, 'pop': true, 'type': 'popstate'});
-  }
 
   simulateHashChange(pathname: string) {
     // Because we don't prevent the native event, the browser will independently update the path

packages/router/src/router.ts

@@ -518,18 +518,11 @@ export class Router {
 
     // Because of a bug in IE and Edge, the location class fires two events (popstate and
     // hashchange) every single time. The second one should be ignored. Otherwise, the URL will
-    // flicker. Handles the case when a popstate was emitted first.
+    // flicker.
     if (lastNavigation && source == 'hashchange' && lastNavigation.source === 'popstate' &&
         lastNavigation.rawUrl.toString() === rawUrl.toString()) {
       return Promise.resolve(true);  // return value is not used
     }
-    // Because of a bug in IE and Edge, the location class fires two events (popstate and
-    // hashchange) every single time. The second one should be ignored. Otherwise, the URL will
-    // flicker. Handles the case when a hashchange was emitted first.
-    if (lastNavigation && source == 'popstate' && lastNavigation.source === 'hashchange' &&
-        lastNavigation.rawUrl.toString() === rawUrl.toString()) {
-      return Promise.resolve(true);  // return value is not used
-    }
 
     let resolve: any = null;
     let reject: any = null;
@@ -552,7 +545,7 @@ export class Router {
     const url = this.urlHandlingStrategy.extract(rawUrl);
     const urlTransition = !this.navigated || url.toString() !== this.currentUrlTree.toString();
 
-    if (this.urlHandlingStrategy.shouldProcessUrl(rawUrl)) {
+    if (urlTransition && this.urlHandlingStrategy.shouldProcessUrl(rawUrl)) {
       (this.events as Subject<Event>).next(new NavigationStart(id, this.serializeUrl(url)));
       Promise.resolve()
           .then(

packages/router/test/integration.spec.ts

@@ -50,29 +50,6 @@ describe('Integration', () => {
        expect(fixture.nativeElement).toHaveText('route');
      })));
 
-  it('should navigate to the current URL',
-     fakeAsync(inject([Router, Location], (router: Router) => {
-       router.resetConfig([
-         {path: '', component: SimpleCmp},
-         {path: 'simple', component: SimpleCmp},
-       ]);
-
-       const fixture = createRoot(router, RootCmp);
-       const events: Event[] = [];
-       router.events.subscribe(e => onlyNavigationStartAndEnd(e) && events.push(e));
-
-       router.navigateByUrl('/simple');
-       tick();
-
-       router.navigateByUrl('/simple');
-       tick();
-
-       expectEvents(events, [
-         [NavigationStart, '/simple'], [NavigationEnd, '/simple'], [NavigationStart, '/simple'],
-         [NavigationEnd, '/simple']
-       ]);
-     })));
-
   describe('should execute navigations serially', () => {
     let log: any[] = [];
 
@@ -451,7 +428,7 @@ describe('Integration', () => {
        }]);
 
        const recordedEvents: any[] = [];
-       router.events.forEach(e => onlyNavigationStartAndEnd(e) && recordedEvents.push(e));
+       router.events.forEach(e => e instanceof RouterEvent && recordedEvents.push(e));
 
        router.navigateByUrl('/team/22/user/victor');
        advance(fixture);
@@ -465,8 +442,15 @@ describe('Integration', () => {
        expect(fixture.nativeElement).toHaveText('team 22 [ user fedor, right:  ]');
 
        expectEvents(recordedEvents, [
-         [NavigationStart, '/team/22/user/victor'], [NavigationEnd, '/team/22/user/victor'],
+         [NavigationStart, '/team/22/user/victor'], [RoutesRecognized, '/team/22/user/victor'],
-         [NavigationStart, '/team/22/user/fedor'], [NavigationEnd, '/team/22/user/fedor']
+         [GuardsCheckStart, '/team/22/user/victor'], [GuardsCheckEnd, '/team/22/user/victor'],
+         [ResolveStart, '/team/22/user/victor'], [ResolveEnd, '/team/22/user/victor'],
+         [NavigationEnd, '/team/22/user/victor'],
+
+         [NavigationStart, '/team/22/user/fedor'], [RoutesRecognized, '/team/22/user/fedor'],
+         [GuardsCheckStart, '/team/22/user/fedor'], [GuardsCheckEnd, '/team/22/user/fedor'],
+         [ResolveStart, '/team/22/user/fedor'], [ResolveEnd, '/team/22/user/fedor'],
+         [NavigationEnd, '/team/22/user/fedor']
        ]);
      })));
 
@@ -3505,30 +3489,34 @@ describe('Integration', () => {
            }]);
 
            const events: any[] = [];
-           router.events.subscribe(e => onlyNavigationStartAndEnd(e) && events.push(e));
+           router.events.subscribe(e => e instanceof RouterEvent && events.push(e));
 
            location.go('/include/user/kate(aux:excluded)');
            advance(fixture);
 
            expect(location.path()).toEqual('/include/user/kate(aux:excluded)');
-           expectEvents(
+           expectEvents(events, [
-               events,
+             [NavigationStart, '/include/user/kate'], [RoutesRecognized, '/include/user/kate'],
-               [[NavigationStart, '/include/user/kate'], [NavigationEnd, '/include/user/kate']]);
+             [GuardsCheckStart, '/include/user/kate'], [GuardsCheckEnd, '/include/user/kate'],
+             [ResolveStart, '/include/user/kate'], [ResolveEnd, '/include/user/kate'],
+             [NavigationEnd, '/include/user/kate']
+           ]);
            events.splice(0);
 
            location.go('/include/user/kate(aux:excluded2)');
            advance(fixture);
-           expectEvents(
+           expectEvents(events, []);
-               events,
-               [[NavigationStart, '/include/user/kate'], [NavigationEnd, '/include/user/kate']]);
-           events.splice(0);
 
            router.navigateByUrl('/include/simple');
            advance(fixture);
 
            expect(location.path()).toEqual('/include/simple(aux:excluded2)');
-           expectEvents(
+           expectEvents(events, [
-               events, [[NavigationStart, '/include/simple'], [NavigationEnd, '/include/simple']]);
+             [NavigationStart, '/include/simple'], [RoutesRecognized, '/include/simple'],
+             [GuardsCheckStart, '/include/simple'], [GuardsCheckEnd, '/include/simple'],
+             [ResolveStart, '/include/simple'], [ResolveEnd, '/include/simple'],
+             [NavigationEnd, '/include/simple']
+           ]);
          })));
     });
   });
@@ -3647,10 +3635,6 @@ function expectEvents(events: Event[], pairs: any[]) {
   }
 }
 
-function onlyNavigationStartAndEnd(e: Event): boolean {
-  return e instanceof NavigationStart || e instanceof NavigationEnd;
-}
-
 @Component(
     {selector: 'link-cmp', template: `<a routerLink="/team/33/simple" [target]="'_self'">link</a>`})
 class StringLinkCmp {