feat: manually mirror opencoze's code from bytedance

Change-Id: I09a73aadda978ad9511264a756b2ce51f5761adf

frontend/packages/common/chat-area/text-grab/__tests__/compare-node-position.test.ts

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2025 coze-dev Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+import { compareNodePosition } from '../src/utils/helper/compare-node-position';
+
+describe('compareNodePosition', () => {
+  let parentNode: HTMLElement;
+  let childNode: HTMLElement;
+  let siblingNode: HTMLElement;
+
+  beforeEach(() => {
+    // 在每个测试之前创建新的 DOM 结构
+    parentNode = document.createElement('div');
+    childNode = document.createElement('span');
+    siblingNode = document.createElement('p');
+    parentNode.appendChild(childNode); // childNode 是 parentNode 的子节点
+    parentNode.appendChild(siblingNode); // siblingNode 是 childNode 的同级节点
+  });
+
+  it('should return "before" if nodeA is before nodeB', () => {
+    expect(compareNodePosition(childNode, siblingNode)).toBe('before');
+  });
+
+  it('should return "after" if nodeA is after nodeB', () => {
+    expect(compareNodePosition(siblingNode, childNode)).toBe('after');
+  });
+
+  it('should return "contains" if nodeA contains nodeB', () => {
+    expect(compareNodePosition(parentNode, childNode)).toBe('contains');
+  });
+
+  it('should return "containedBy" if nodeA is contained by nodeB', () => {
+    expect(compareNodePosition(childNode, parentNode)).toBe('containedBy');
+  });
+
+  it('should return "none" for the same node', () => {
+    expect(compareNodePosition(parentNode, parentNode)).toBe('none');
+  });
+});