test: improve coverage on worker threads

PR-URL: #36910 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>

Author: juanarbol

test/parallel/test-worker-unsupported-things.js

@@ -24,6 +24,14 @@ if (!process.env.HAS_STARTED_WORKER) {
  assert.strictEqual(process.debugPort, before);
  }
 
+ {
+ const mask = 0o600;
+ assert.throws(() => { process.umask(mask); }, {
+ code: 'ERR_WORKER_UNSUPPORTED_OPERATION',
+ message: 'Setting process.umask() is not supported in workers'
+ });
+ }
+
  const stubs = ['abort', 'chdir', 'send', 'disconnect'];
 
  if (!common.isWindows) {
@@ -35,13 +43,19 @@ if (!process.env.HAS_STARTED_WORKER) {
  assert.strictEqual(process[fn].disabled, true);
  assert.throws(() => {
  process[fn]();
- }, { code: 'ERR_WORKER_UNSUPPORTED_OPERATION' });
+ }, {
+ code: 'ERR_WORKER_UNSUPPORTED_OPERATION',
+ message: `process.${fn}() is not supported in workers`
+ });
  });
 
  ['channel', 'connected'].forEach((fn) => {
  assert.throws(() => {
  process[fn]; // eslint-disable-line no-unused-expressions
- }, { code: 'ERR_WORKER_UNSUPPORTED_OPERATION' });
+ }, {
+ code: 'ERR_WORKER_UNSUPPORTED_OPERATION',
+ message: `process.${fn} is not supported in workers`
+ });
  });
 
  assert.strictEqual('_startProfilerIdleNotifier' in process, false);