Merge pull request #14994 from IgniteUI/sstoychev/flickering-test-combo

test(combo): fixing combo test with new puppeteer (cherrypick from master)

Author: ChronosSF

projects/igniteui-angular/src/lib/combo/combo.component.spec.ts

@@ -2066,7 +2066,7 @@ describe('igxCombo', () => {
                 spyOn(combo.dropdown, 'onToggleClosing').and.callThrough();
                 spyOn(combo.dropdown, 'onToggleClosed').and.callThrough();
                 combo.toggle();
-                await wait(30);
+                await wait();
                 fixture.detectChanges();
                 expect(combo.collapsed).toEqual(false);
                 expect(combo.dropdown.onToggleOpening).toHaveBeenCalledTimes(1);
@@ -2075,17 +2075,17 @@ describe('igxCombo', () => {
                 expect(virtDir.getScroll().scrollTop).toEqual(0);
                 expect(vContainerScrollHeight).toBeGreaterThan(combo.itemHeight);
                 virtDir.getScroll().scrollTop = Math.floor(vContainerScrollHeight / 2);
-                await wait(30);
+                await firstValueFrom(combo.virtualScrollContainer.chunkLoad);
                 fixture.detectChanges();
                 expect(virtDir.getScroll().scrollTop).toBeGreaterThan(0);
                 UIInteractions.simulateClickEvent(document.documentElement);
-                await wait(10);
+                await wait();
                 fixture.detectChanges();
                 expect(combo.collapsed).toEqual(true);
                 expect(combo.dropdown.onToggleClosing).toHaveBeenCalledTimes(1);
                 expect(combo.dropdown.onToggleClosed).toHaveBeenCalledTimes(1);
                 combo.toggle();
-                await wait(30);
+                await wait();
                 fixture.detectChanges();
                 expect(combo.collapsed).toEqual(false);
                 expect(combo.dropdown.onToggleOpening).toHaveBeenCalledTimes(2);