test: add test for worker.terminate() + timeout fns

PR-URL: #25735
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: addaleax

test/parallel/test-worker-terminate-timers.js

@@ -0,0 +1,18 @@
+'use strict';
+const common = require('../common');
+const { Worker } = require('worker_threads');
+
+// Test that calling .terminate() during a timer callback works fine.
+
+for (const fn of ['setTimeout', 'setImmediate', 'setInterval']) {
+  const worker = new Worker(`
+  const { parentPort } = require('worker_threads');
+  ${fn}(() => {
+    require('worker_threads').parentPort.postMessage({});
+    while (true);
+  });`, { eval: true });
+
+  worker.on('message', common.mustCallAtLeast(() => {
+    worker.terminate();
+  }));
+}