fix: prevent Search component to throw passing null as enterButton (#27591)

components/input/Search.tsx

@@ -56,7 +56,7 @@ const Search = React.forwardRef<Input, SearchProps>((props, ref) => {
     const btnClassName = `${prefixCls}-button`;
 
     let button: React.ReactNode;
-    const enterButtonAsElement = enterButton as React.ReactElement;
+    const enterButtonAsElement = (enterButton || {}) as React.ReactElement;
     const isAntdButton =
       enterButtonAsElement.type &&
       (enterButtonAsElement.type as typeof Button).__ANT_BUTTON === true;

components/input/__tests__/Search.test.js

@@ -21,6 +21,12 @@ describe('Input.Search', () => {
     expect(wrapper.render()).toMatchSnapshot();
   });
 
+  it('should support enterButton null', () => {
+    expect(() => {
+      mount(<Search enterButton={null} />);
+    }).not.toThrow();
+  });
+
   it('should support ReactNode suffix without error', () => {
     const wrapper = mount(<Search suffix={<div>ok</div>} />);
     expect(wrapper.render()).toMatchSnapshot();