test-fs-filehandle-use-after-close.js

'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs').promises;

(async () => {
  const filehandle = await fs.open(__filename);

  assert.notStrictEqual(filehandle.fd, -1);
  await filehandle.close();
  assert.strictEqual(filehandle.fd, -1);

  // Open another file handle first. This would typically receive the fd
  // that `filehandle` previously used. In earlier versions of Node.js, the
  // .stat() call would then succeed because it still used the original fd;
  // See https://github.com/nodejs/node/issues/31361 for more details.
  const otherFilehandle = await fs.open(process.execPath);

  await assert.rejects(() => filehandle.stat(), {
    code: 'EBADF',
    syscall: 'fstat'
  });

  await otherFilehandle.close();
})().then(common.mustCall());