test(adv-filtering): fix dropdown getter #5496

Author: tachojelev

projects/igniteui-angular/src/lib/grids/filtering/advanced-filtering/advanced-filtering-dialog.component.html

@@ -356,5 +356,6 @@ <h6 class="igx-filter-empty__title">
 </article>
 <div #overlayOutlet
      igxOverlayOutlet
+     class="igx-advanced-filter__outlet"
      (pointerdown)="onOutletPointerDown($event)">
 </div>

projects/igniteui-angular/src/lib/test-utils/grid-functions.spec.ts

@@ -1381,9 +1381,16 @@ export class GridFunctions {
         return closeButton;
     }
 
+    public static getAdvancedFilteringOutlet(fix: ComponentFixture<any>) {
+        const gridNativeElement = fix.debugElement.query(By.css('igx-grid')).nativeElement;
+        const advFilteringDialog = gridNativeElement.querySelector('igx-advanced-filtering-dialog');
+        const outlet = advFilteringDialog.querySelector('.igx-advanced-filter__outlet');
+        return outlet;
+    }
+
     public static getAdvancedFilteringSelectDropdown(fix: ComponentFixture<any>) {
-        const overlay = GridFunctions.getOverlay(fix);
-        const selectDropdown = overlay.querySelector('.igx-drop-down__list--select');
+        const outlet = GridFunctions.getAdvancedFilteringOutlet(fix);
+        const selectDropdown = outlet.querySelector('.igx-drop-down__list--select');
         return selectDropdown;
     }