fix(ext/node): add basic node:worker_threads support (#19192)

This PR restores `node:worker_threads` implementation and test cases
from
[`std@0.175.0/node`](https://github.com/denoland/deno_std/blob/0.175.0/node/worker_threads.ts).

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/cli/tests/node_compat/test/common/tmpdir.js b/cli/tests/node_compat/test/common/tmpdir.js
index d3ce98e45..dbc945c13 100644
--- a/cli/tests/node_compat/test/common/tmpdir.js
+++ b/cli/tests/node_compat/test/common/tmpdir.js
@@ -2,14 +2,14 @@
 // deno-lint-ignore-file
 
 // Copyright Joyent and Node contributors. All rights reserved. MIT license.
-// Taken from Node 16.13.0
+// Taken from Node 18.12.1
 // This file is automatically generated by "node/_tools/setup.ts". Do not modify this file manually
 
 'use strict';
 
 const fs = require('fs');
 const path = require('path');
-// const { isMainThread } = require('worker_threads');
+const { isMainThread } = require('worker_threads');
 
 function rmSync(pathname) {
   fs.rmSync(pathname, { maxRetries: 3, recursive: true, force: true });
@@ -26,8 +26,8 @@ const tmpPath = path.join(testRoot, tmpdirName);
 
 let firstRefresh = true;
 function refresh() {
-  rmSync(this.path);
-  fs.mkdirSync(this.path);
+  rmSync(tmpPath);
+  fs.mkdirSync(tmpPath);
 
   if (firstRefresh) {
     firstRefresh = false;
@@ -39,9 +39,8 @@ function refresh() {
 
 function onexit() {
   // Change directory to avoid possible EBUSY
-  // TODO(f3n67u): uncomment when `worker_thread.isMainThread` implemented
-  // if (isMainThread)
-  //   process.chdir(testRoot);
+  if (isMainThread)
+    process.chdir(testRoot);
 
   try {
     rmSync(tmpPath);