问题是您在这里仅将第一个参数传递给addChild函数。

addChild函数期望提供4个参数。但是：

node.addChild(childNode)

// is approximately equivalent to:

addChild ( Node {...},undefined,undefined)

您应该像这样调用函数：

node.addChild(childNode.path,childNode.path,childNode.name,childNode.fifo)

您在逻辑上走上了正确的道路，正在寻求一个很好的递归解决方案，但我认为该类有点过分适用，并且对于诸如此类的功能问题而言，也太面向对象了。这是功能更强的版本的简要示例，应该可以为您带来预期的结果：

const nodePath = require('path');
const fs = require('fs');

/**
 * Supply an `fs` function and it will turn it into a promisified version
 * @param {Function} fn The function to promisify. This means you do not 
 * need the `fsp` library.
 */
function promisify (fn) {
  return (...args) => new Promise((resolve,reject) => fn(...args,(err,data) => err ? reject(err) : resolve(data)));
};

// Create promisified versions of `fs.stat` and `fs.readdir`
const stat = promisify(fs.stat);
const readdir = promisify(fs.readdir);

function createDirectory (parent,path,name,kids) {
  return { parent,kids: kids || [] };
};

function createFile (parent,name) {
  return { parent,type: 'fileType' };
}

// The main recursive function.
async function createTree (parent,path) {
  let stats = await stat(path);

  if (stats.isDirectory()) {
    const children = await readdir(path);

    // Because each recursive call retruns a promise,we want to continue only when
    // all of them have resolved. So we use Promise.all for this.
    let child_nodes = await Promise.all(
      children.map(child => createTree(path,nodePath.join(path,child)))
    );

    // Create a directory node
    return createDirectory(parent,nodePath.basename(path),child_nodes);
  }

  // Create a file node
  return createFile(parent,nodePath.basename(path));
};


// Startup code,can use your own stuff here.
async function start () {
  let tree = await createTree(null,'/home/james/stackoverflow/58706769/Test Root');

  console.log(JSON.stringify(tree,null,2));
}

start();

在Node中运行此文件，我得到以下输出：

{
  "parent": null,"path": "/home/james/stackoverflow/58706769/Test Root","name": "Test Root","kids": [
    {
      "parent": "/home/james/stackoverflow/58706769/Test Root","path": "/home/james/stackoverflow/58706769/Test Root/1a","name": "1a","kids": []
    },{
      "parent": "/home/james/stackoverflow/58706769/Test Root","path": "/home/james/stackoverflow/58706769/Test Root/1b","name": "1b","kids": [
        {
          "parent": "/home/james/stackoverflow/58706769/Test Root/1b","path": "/home/james/stackoverflow/58706769/Test Root/1b/2a","name": "2a","kids": []
        },{
          "parent": "/home/james/stackoverflow/58706769/Test Root/1b","path": "/home/james/stackoverflow/58706769/Test Root/1b/2b","name": "2b","path": "/home/james/stackoverflow/58706769/Test Root/1b/2c","name": "2c","kids": []
        }
      ]
    },"path": "/home/james/stackoverflow/58706769/Test Root/1c","name": "1c","kids": [
        {
          "parent": "/home/james/stackoverflow/58706769/Test Root/1c","path": "/home/james/stackoverflow/58706769/Test Root/1c/2a","path": "/home/james/stackoverflow/58706769/Test Root/1d","name": "1d","kids": [
        {
          "parent": "/home/james/stackoverflow/58706769/Test Root/1d","path": "/home/james/stackoverflow/58706769/Test Root/1d/2a",{
          "parent": "/home/james/stackoverflow/58706769/Test Root/1d","path": "/home/james/stackoverflow/58706769/Test Root/1d/2b","path": "/home/james/stackoverflow/58706769/Test Root/testfile.txt","name": "testfile.txt","type": "fileType"
    }
  ]
}