chore: add test for SelectBox regression + remove old fix (re: T12386…

…37) (#27847)

packages/devextreme-react/src/core/__tests__/integration/integration.test.tsx

@@ -0,0 +1,48 @@
+import * as testingLib from '@testing-library/react';
+import * as React from 'react';
+
+import { useState, useEffect } from 'react';
+import SelectBox from '../../../select-box';
+import TextBox from '../../../text-box';
+
+jest.useFakeTimers();
+
+describe('selectbox', () => {
+  afterEach(() => {
+    jest.clearAllMocks();
+    testingLib.cleanup();
+  });
+
+  it('renders selectbox in strict mode when data source is specified dynamically without errors', () => {
+    const Field = (data: any) => {
+      return (<TextBox defaultValue={data && data.Name} />);
+    }
+
+    const list = [{ ID: 1, Name: 'Item 1' }];
+
+    const SelectBoxWithDynamicDataSource = () => {
+      const [items, setItems] = useState([{}]);
+
+      useEffect(() => {
+        setItems(list);
+      }, []);
+
+      return (
+        <SelectBox
+          dataSource={items}
+          displayExpr="Name"
+          valueExpr="ID"
+          fieldRender={Field}
+        />
+      );
+    };
+
+    const renderSelectBox = () => testingLib.render(
+      <React.StrictMode>
+        <SelectBoxWithDynamicDataSource />
+      </React.StrictMode>
+    );
+
+    expect(renderSelectBox).not.toThrow();
+  });
+});