Nodejs asynchronous read and write file

asyncReadWriteFile.js

var parser = require("azure-func-multipart-parser");
var localImports = require("../modules/local-imports.js")
const FormData = require("form-data");
const fs = require('fs')
const { promisify } = require('util')
const readFileAsync = promisify(fs.readFile)
const writeFileAsync = promisify(fs.writeFile)

const run = async () => {
  await writeFileAsync("/tmp/test/data.json", Buffer.from('Hello Node.js'));
  const res = await readFileAsync('/tmp/test/data.json');
  console.log(res)
}

run()