fix no result and refactoring tests

demo-shell-ng2/app/components/search/search-bar.component.ts

@@ -32,6 +32,7 @@ export class SearchBarComponent {
 
     fileNodeId: string;
     fileShowed: boolean = false;
+    searchTerm: string = '';
 
     @Output()
     expand = new EventEmitter();
@@ -50,6 +51,11 @@ export class SearchBarComponent {
         }
     }
 
+    searchTermChange(event) {
+        console.log('Search term changed', event);
+        this.searchTerm = event.value;
+    }
+
     onExpandToggle(event) {
         this.expand.emit(event);
     }