[ACA-2081] Search - toolbar not visible after viewer is closed (#869)

* router event filter search

* test

* added comment

src/app/components/layout/app-layout/app-layout.component.spec.ts

@@ -41,7 +41,7 @@ class MockRouter {
   events = this.subject.asObservable();
   routerState = { snapshot: { url: this.url } };
 
-  navigate(url: string) {
+  navigateByUrl(url: string) {
     const navigationStart = new NavigationStart(0, url);
     this.subject.next(navigationStart);
   }
@@ -143,11 +143,24 @@ describe('AppLayoutComponent', () => {
     const selection = [{ entry: { id: 'nodeId', name: 'name' } }];
     store.dispatch(new SetSelectedNodesAction(selection));
 
-    router.navigate(['somewhere/over/the/rainbow']);
+    router.navigateByUrl('somewhere/over/the/rainbow');
     fixture.detectChanges();
     store.select(appSelection).subscribe(state => {
       expect(state.isEmpty).toBe(true);
       done();
     });
   });
+
+  it('should not reset selection if route is `/search`', done => {
+    fixture.detectChanges();
+    const selection = [{ entry: { id: 'nodeId', name: 'name' } }];
+    store.dispatch(new SetSelectedNodesAction(selection));
+
+    router.navigateByUrl('/search;q=');
+    fixture.detectChanges();
+    store.select(appSelection).subscribe(state => {
+      expect(state.isEmpty).toBe(false);
+      done();
+    });
+  });
 });

src/app/components/layout/app-layout/app-layout.component.ts

@@ -135,7 +135,13 @@ export class AppLayoutComponent implements OnInit, OnDestroy {
 
     this.router.events
       .pipe(
-        filter(event => event instanceof NavigationStart),
+        filter(event => {
+          return (
+            event instanceof NavigationStart &&
+            // search employs reuse route strategy
+            !event.url.startsWith('/search;')
+          );
+        }),
         takeUntil(this.onDestroy$)
       )
       .subscribe(() => this.store.dispatch(new SetSelectedNodesAction([])));