Is there any way to solve NODE createReadSream error ENOENT: no such file or directory with fs.unlink?

Question

Goal

1. check file is exists
2. if a file exists delete that

Here is stand-alone test code

const fs = require("fs")

const fileName = "a.txt"

fs.writeFile(fileName, "Hello World", function () { })

fs.createReadStream(fileName) // error!

fs.unlink(fileName, function (err) {
  if(err) console.error(err, "err")
})

It works on MacOS with node v12.13.0 but not working on MacOS node v16.13.0 and Ubuntu20.04.3 LTS with node v12.13.0, v16.13.0

I know that not a good idea to use createReadStream for files exists but I'd want to know what's wrong with it.

And here is my revised code.

version1. using createReadStream

const file = fs.createReadStream(filePath)

file.on('end', () => {
  fs.unlink(filePath, function(err) {
    if (err) console.error(err, "err")
  })
})

version2. using existsSync

if (fs.existsSync(filePath)) {
  fs.unlinkSync(filePath)
}

---

Question

What is the problem, why MacOS v12.13.0 works but MacOS v16.13.0. and Why not working on Ubuntu

Thanks in advance.