test(react-link): fix failing rit test

Author: mainframev

packages/react-components/react-list/library/src/components/List/List.test.tsx

@@ -7,6 +7,14 @@ import { ListItem } from '../ListItem/ListItem';
 import { ListItemActionEventData } from '../ListItem/ListItem.types';
 import { EventHandler } from '@fluentui/react-utilities';
 
+// Mock useId from @fluentui/react-utilities to return CSS-safe IDs without special characters.
+// React's useId generates IDs with commas that create invalid CSS selectors in JSDOM 25+,
+// causing console.error logs that React 19's act() collects as AggregateError.
+jest.mock('@fluentui/react-utilities', () => ({
+  ...jest.requireActual('@fluentui/react-utilities'),
+  ...jest.requireActual('../../testing/createUseIdMock').createUseIdMock(),
+}));
+
 function expectListboxItemSelected(item: HTMLElement, selected: boolean) {
   expect(item.getAttribute('aria-selected')).toBe(selected.toString());
 }
@@ -60,6 +68,7 @@ describe('List', () => {
 
   afterAll(() => {
     consoleWarn.mockRestore();
+    jest.clearAllMocks();
   });
 
   describe('rendering', () => {