Revert "Revert "fix: disabled draggable node should have draggable className (#632)""

This reverts commit 654edb7.

Author: MadCcc

.fatherrc.js

@@ -3,7 +3,7 @@ export default {
   esm: { type: 'babel', importLibToEs: true },
   preCommit: {
     eslint: true,
-    prettier: true,
+    prettier: false,
   },
   runtimeHelpers: true,
 };

src/TreeNode.tsx

@@ -577,7 +577,7 @@ class InternalTreeNode extends React.Component<InternalTreeNodeProps, TreeNodeSt
           [`${prefixCls}-treenode-loading`]: loading,
           [`${prefixCls}-treenode-active`]: active,
           [`${prefixCls}-treenode-leaf-last`]: isEndNode,
-          [`${prefixCls}-treenode-draggable`]: draggableWithoutDisabled,
+          [`${prefixCls}-treenode-draggable`]: mergedDraggable,
 
           dragging,
           'drop-target': dropTargetKey === eventKey,

tests/TreeDraggable.spec.tsx

@@ -1135,4 +1135,16 @@ describe('Tree Draggable', () => {
     // Should not break
     fireEvent.dragEnd(container.querySelector('.test'));
   });
+
+  it('disabled item should have draggable className', () => {
+    const { container } = render(
+      <Tree draggable defaultExpandAll>
+        <TreeNode title="parent 1" key="0-0">
+          <TreeNode title="leaf" key="0-0-0" disabled />
+          <TreeNode title="leaf" key="0-0-1" />
+        </TreeNode>
+      </Tree>,
+    );
+    expect(container.querySelectorAll('.rc-tree-treenode-draggable').length).toBe(3);
+  });
 });