test/parallel/test-process-umask.js

// Copyright Joyent, Inc. and other Node contributors.
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//
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'use strict';
const common = require('../common');
const assert = require('assert');
const { isMainThread } = require('worker_threads');

if (!isMainThread) {
  assert.strictEqual(typeof process.umask(), 'number');
  assert.throws(() => {
    process.umask('0664');
  }, { code: 'ERR_WORKER_UNSUPPORTED_OPERATION' });

  common.skip('Setting process.umask is not supported in Workers');
}

// Note in Windows one can only set the "user" bits.
let mask;
if (common.isWindows) {
  mask = '0600';
} else {
  mask = '0664';
}

const old = process.umask(mask);

assert.strictEqual(process.umask(old), parseInt(mask, 8));

// Confirm reading the umask does not modify it.
// 1. If the test fails, this call will succeed, but the mask will be set to 0
assert.strictEqual(process.umask(), old);
// 2. If the test fails, process.umask() will return 0
assert.strictEqual(process.umask(), old);

assert.throws(() => {
  process.umask({});
}, {
  code: 'ERR_INVALID_ARG_TYPE',
});

['123x', 'abc', '999'].forEach((value) => {
  assert.throws(() => {
    process.umask(value);
  }, {
    code: 'ERR_INVALID_ARG_VALUE',
  });
});