text: 'use strict';
  
  const common = require('../common');
  
  // The following tests validate base functionality for the fs.promises
  // FileHandle.chmod method.
  
  const fs = require('fs');
  const { open } = fs.promises;
  const path = require('path');
  const tmpdir = require('../common/tmpdir');
  const assert = require('assert');
  const tmpDir = tmpdir.path;
  
  tmpdir.refresh();
  
  async function validateFilePermission() {
    const filePath = path.resolve(tmpDir, 'tmp-chmod.txt');
    const fileHandle = await open(filePath, 'w+', 0o444);
    // File created with r--r--r-- 444
    const statsBeforeMod = fs.statSync(filePath);
    assert.deepStrictEqual(statsBeforeMod.mode & 0o444, 0o444);
  
    let expectedAccess;
    const newPermissions = 0o765;
  
    if (common.isWindows) {
      // Chmod in Windows will only toggle read only/write access. The
      // fs.Stats.mode in Windows is computed using read/write
      // bits (not exec). Read-only at best returns 444; r/w 666.
      // Refer: /deps/uv/src/win/fs.cfs;
      expectedAccess = 0o664;
    } else {
      expectedAccess = newPermissions;
    }
  
    // Change the permissions to rwxr--r-x
    await fileHandle.chmod(newPermissions);
    const statsAfterMod = fs.statSync(filePath);
    assert.deepStrictEqual(statsAfterMod.mode & expectedAccess, expectedAccess);
  }
  
  validateFilePermission().then(common.mustCall());
  