fix: recursion lose prefixCls (#737)

Author: coding-ice

src/utils/nodeUtil.tsx

@@ -30,15 +30,15 @@ function convertItemsToNodes(
             // Group
             return (
               <MergedMenuItemGroup key={mergedKey} {...restProps} title={label}>
-                {convertItemsToNodes(children, components)}
+                {convertItemsToNodes(children, components, prefixCls)}
               </MergedMenuItemGroup>
             );
           }
 
           // Sub Menu
           return (
             <MergedSubMenu key={mergedKey} {...restProps} title={label}>
-              {convertItemsToNodes(children, components)}
+              {convertItemsToNodes(children, components, prefixCls)}
             </MergedSubMenu>
           );
         }

tests/MenuItem.spec.tsx

@@ -206,5 +206,27 @@ describe('MenuItem', () => {
 
       expect(container.querySelector('li')).toMatchSnapshot();
     });
+
+    it('should set extra to group option', () => {
+      const { container } = render(
+        <Menu
+          items={[
+            {
+              type: 'group',
+              label: 'Top Menu Group with children',
+              children: [
+                {
+                  label: 'Menu Item 1',
+                  key: 'top',
+                  extra: '⌘B',
+                },
+              ],
+            },
+          ]}
+        />,
+      );
+
+      expect(container.querySelector('li')).toMatchSnapshot();
+    });
   });
 });

tests/__snapshots__/MenuItem.spec.tsx.snap

@@ -1,5 +1,38 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`MenuItem overwrite default role should set extra to group option 1`] = `
+<li
+  class="rc-menu-item-group"
+  role="presentation"
+>
+  <div
+    class="rc-menu-item-group-title"
+    role="presentation"
+    title="Top Menu Group with children"
+  >
+    Top Menu Group with children
+  </div>
+  <ul
+    class="rc-menu-item-group-list"
+    role="group"
+  >
+    <li
+      class="rc-menu-item"
+      data-menu-id="rc-menu-uuid-test-top"
+      role="menuitem"
+      tabindex="-1"
+    >
+      Menu Item 1
+      <span
+        class="rc-menu-extra"
+      >
+        ⌘B
+      </span>
+    </li>
+  </ul>
+</li>
+`;
+
 exports[`MenuItem overwrite default role should set extra to option 1`] = `
 <li
   class="rc-menu-item"