fix test

Author: Tucchhaa

packages/devextreme/js/__internal/grids/grid_core/data_controller/m_data_controller.ts

@@ -1156,7 +1156,7 @@ export class DataController extends DataHelperMixin(modules.Controller) {
     const changeType = change.changeType || 'refresh';
 
     change.changeType = changeType;
-    change.operationTypes = this._currentOperationTypes;
+    change.operationTypes ??= this._currentOperationTypes;
     this._currentOperationTypes = null;
 
     if (dataSource) {

packages/devextreme/testing/tests/DevExpress.ui.widgets.dataGrid/dataController.tests.js

@@ -3242,8 +3242,8 @@ QUnit.module('Paging', { beforeEach: setupPagingModule, afterEach: teardownPagin
         // assert
         assert.equal(this.dataController.items().length, 3);
         assert.equal(this.dataController.pageCount(), 3);
-        assert.equal(this.dataController.pageIndex(), 0);
-        assert.deepEqual(this.dataController.items()[0].values, ['Alex', 215]);
+        assert.equal(this.dataController.pageIndex(), 1);
+        assert.deepEqual(this.dataController.items()[0].values, ['Dan3', 153]);
 
         // T262949
         assert.equal(countCallPageChanged, 1, 'count call pageChanged');