From e7abde44db62912ccf4514ef17a88ff08bc0e7e2 Mon Sep 17 00:00:00 2001
From: itaysabato <itaysabato@gmail.com>
Date: Mon, 25 Jun 2018 10:13:01 +0300
Subject: [PATCH] test: add a request-response test for MessageChannel
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This commit adds a request-response test for MessageChannel.

PR-URL: https://github.com/nodejs/node/pull/21514
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
---
 test/parallel/test-message-port.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/test/parallel/test-message-port.js b/test/parallel/test-message-port.js
index fe88126d044c2b..2d321611ec7758 100644
--- a/test/parallel/test-message-port.js
+++ b/test/parallel/test-message-port.js
@@ -18,6 +18,21 @@ const { MessageChannel, MessagePort } = require('worker_threads');
   }));
 }
 
+{
+  const { port1, port2 } = new MessageChannel();
+
+  port1.onmessage = common.mustCall((message) => {
+    assert.strictEqual(message, 4);
+    port2.close(common.mustCall());
+  });
+
+  port1.postMessage(2);
+
+  port2.onmessage = common.mustCall((message) => {
+    port2.postMessage(message * 2);
+  });
+}
+
 {
   const { port1, port2 } = new MessageChannel();