1 files changed, 40 insertions, 0 deletions
diff --git a/tests/specs/node/worker_threads/message_port_unref.mjs b/tests/specs/node/worker_threads/message_port_unref.mjs
new file mode 100644
index 000000000..a12be1ec8
--- /dev/null
+++ b/tests/specs/node/worker_threads/message_port_unref.mjs
@@ -0,0 +1,40 @@
+import {
+  isMainThread,
+  MessageChannel,
+  parentPort,
+  Worker,
+  workerData,
+} from "node:worker_threads";
+
+const useParentPort = Deno.env.get("PARENT_PORT") === "1";
+
+if (useParentPort) {
+  if (isMainThread) {
+    const worker = new Worker(import.meta.filename);
+    worker.postMessage("main says hi!");
+    worker.on("message", (msg) => console.log(msg));
+  } else {
+    parentPort.on("message", (msg) => {
+      console.log(msg);
+      parentPort.postMessage("worker says hi!");
+      parentPort.unref();
+    });
+  }
+} else {
+  if (isMainThread) {
+    const { port1, port2 } = new MessageChannel();
+    const worker = new Worker(import.meta.filename, {
+      workerData: port2,
+      transferList: [port2],
+    });
+    port1.postMessage("main says hi!");
+    port1.on("message", (msg) => console.log(msg));
+  } else {
+    const port = workerData;
+    port.on("message", (msg) => {
+      console.log(msg);
+      port.postMessage("worker says hi!");
+      port.unref();
+    });
+  }
+}