fix(ESF): Fixed a test in ESF search component. (#16409)

Author: gedinakova

projects/igniteui-angular/src/lib/grids/grid/grid-filtering-ui.spec.ts

@@ -6580,27 +6580,24 @@ describe('IgxGrid - Filtering actions - Excel style filtering #grid', () => {
 
             // Scroll the search list to the bottom.
             let scrollbar = GridFunctions.getExcelStyleSearchComponentScrollbar(fix);
+            expect(scrollbar.scrollTop).toBe(0);
+            let listItems = GridFunctions.getExcelStyleSearchComponentListItems(fix);
+            expect(listItems[0].innerText).toBe('Select All');
+
             scrollbar.scrollTop = 3000;
             await wait();
             fix.detectChanges();
+            expect(listItems[0].innerText).not.toBe('Select All');
+            expect(scrollbar.scrollTop).toBeGreaterThan(300);
 
             // Select another column
             GridFunctions.clickExcelFilterIcon(fix, 'Downloads');
             await wait();
             fix.detectChanges();
 
             // Update scrollbar
-            const searchComponent = GridFunctions.getExcelStyleSearchComponent(fix);
             scrollbar = GridFunctions.getExcelStyleSearchComponentScrollbar(fix);
-            await wait();
-            fix.detectChanges();
-
-            // Get the display container and its parent and verify that the display container is at start
-            const displayContainer = searchComponent.querySelector('igx-display-container');
-            const displayContainerRect = displayContainer.getBoundingClientRect();
-            const parentContainerRect = displayContainer.parentElement.getBoundingClientRect();
-
-            expect(displayContainerRect.top - parentContainerRect.top <= 1).toBe(true, 'search scrollbar did not reset');
+            expect(scrollbar.scrollTop).toBe(0, 'search scrollbar did not reset');
         });
     });