From f5db04dcbdaf64b95bd6ca670224d2a9aec31a28 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Zasso?= <targos@protonmail.com>
Date: Sun, 24 Jun 2018 20:23:36 +0200
Subject: [PATCH] workers: add test for messagePort.onmessage

PR-URL: https://github.com/nodejs/node/pull/21510
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 test/parallel/test-worker-onmessage.js | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 test/parallel/test-worker-onmessage.js

diff --git a/test/parallel/test-worker-onmessage.js b/test/parallel/test-worker-onmessage.js
new file mode 100644
index 00000000000000..895536c15038be
--- /dev/null
+++ b/test/parallel/test-worker-onmessage.js
@@ -0,0 +1,18 @@
+// Flags: --experimental-worker
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const { Worker, isMainThread, parentPort } = require('worker_threads');
+
+if (isMainThread) {
+  const w = new Worker(__filename);
+  w.on('message', common.mustCall((message) => {
+    assert.strictEqual(message, 4);
+    w.terminate();
+  }));
+  w.postMessage(2);
+} else {
+  parentPort.onmessage = common.mustCall((message) => {
+    parentPort.postMessage(message * 2);
+  });
+}