test: add itemRender test

Author: 刘欢

tests/index.test.tsx

@@ -817,5 +817,29 @@ describe('Segmented keyboard navigation', () => {
       const labels = container.querySelectorAll('.test-title');
       expect(labels).toHaveLength(3);
     });
+    it('should pass complete params to itemRender', () => {
+      const mockItemRender = jest.fn((node, params) => node);
+      const testData = {
+        label: 'iOS',
+        value: 'iOS',
+        disabled: false,
+        title: 'iOS',
+      };
+      render(
+        <Segmented
+          options={[{ ...testData, className: 'test-class' }, 'Android', 'Web']}
+          itemRender={mockItemRender}
+        />,
+      );
+      expect(mockItemRender).toHaveBeenCalledTimes(3);
+      const callArgs = mockItemRender.mock.calls[0];
+      const receivedParams = callArgs[1];
+      expect(receivedParams).toEqual({
+        item: {
+          ...testData,
+        },
+      });
+      expect(React.isValidElement(callArgs[0])).toBeTruthy();
+    });
   });
 });