Chore: fix flaky unit test (#98102)

fix flaky unit test

public/app/features/search/state/SearchStateManager.test.ts

@@ -1,3 +1,5 @@
+import { waitFor } from '@testing-library/react';
+
 import { DataFrameView } from '@grafana/data';
 import { locationService } from '@grafana/runtime';
 
@@ -33,6 +35,14 @@ describe('SearchStateManager', () => {
     view: new DataFrameView<DashboardQueryResult>({ fields: [], length: 0 }),
   });
 
+  beforeEach(() => {
+    jest.useFakeTimers();
+  });
+
+  afterEach(() => {
+    jest.useRealTimers();
+  });
+
   it('Can get search state manager with initial state', async () => {
     const stm = getSearchStateManager();
     expect(stm.state.layout).toBe(SearchLayout.Folders);
@@ -115,9 +125,9 @@ describe('SearchStateManager', () => {
 
       stm.onQueryChange('debugging');
 
-      await wait(150);
+      jest.advanceTimersByTime(150);
 
-      expect(stm.state.result?.totalRows).toEqual(10);
+      await waitFor(() => expect(stm.state.result?.totalRows).toEqual(10));
     });
   });
 });