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);
 }
 
+{
+constmask=0o600;
+assert.throws(()=>{process.umask(mask);},{
+code: 'ERR_WORKER_UNSUPPORTED_OPERATION',
+message: 'Setting process.umask() is not supported in workers'
+});
+}
+
 conststubs=['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'inprocess,false);