fix: fix Descriptions size small of CP (#42244)

components/descriptions/__tests__/index.test.tsx

@@ -4,6 +4,7 @@ import Descriptions from '..';
 import mountTest from '../../../tests/shared/mountTest';
 import { resetWarned } from '../../_util/warning';
 import { render } from '../../../tests/utils';
+import ConfigProvider from '../../config-provider';
 
 describe('Descriptions', () => {
   mountTest(Descriptions);
@@ -267,4 +268,15 @@ describe('Descriptions', () => {
     expect(container).toHaveAttribute('data-id', '12345');
     expect(container).toHaveAttribute('aria-describedby', 'some-label');
   });
+
+  it('Descriptions should inherit the size from ConfigProvider if the componentSize is set ', () => {
+    const { container } = render(
+      <ConfigProvider componentSize="small">
+        <Descriptions bordered>
+          <Descriptions.Item label="small">small</Descriptions.Item>
+        </Descriptions>
+      </ConfigProvider>,
+    );
+    expect(container.querySelectorAll('.ant-descriptions-small')).toHaveLength(1);
+  });
 });

components/descriptions/index.tsx

@@ -11,6 +11,7 @@ import DescriptionsItem from './Item';
 import Row from './Row';
 
 import useStyle from './style';
+import SizeContext from '../config-provider/SizeContext';
 
 export interface DescriptionsContextProps {
   labelStyle?: React.CSSProperties;
@@ -127,7 +128,7 @@ function Descriptions({
   className,
   rootClassName,
   style,
-  size,
+  size: customizeSize,
   labelStyle,
   contentStyle,
   ...restProps
@@ -137,6 +138,9 @@ function Descriptions({
   const [screens, setScreens] = React.useState<ScreenMap>({});
   const mergedColumn = getColumn(column, screens);
 
+  const size = React.useContext(SizeContext);
+  const mergedSize = customizeSize ?? size;
+
   const [wrapSSR, hashId] = useStyle(prefixCls);
   const responsiveObserver = useResponsiveObserver();
 
@@ -167,7 +171,7 @@ function Descriptions({
         className={classNames(
           prefixCls,
           {
-            [`${prefixCls}-${size}`]: size && size !== 'default',
+            [`${prefixCls}-${mergedSize}`]: mergedSize && mergedSize !== 'default',
             [`${prefixCls}-bordered`]: !!bordered,
             [`${prefixCls}-rtl`]: direction === 'rtl',
           },