nodejs
diff --git a/Collapse file
‎test/parallel/test-message-port.js‎
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+15Lines changed: 15 additions & 0 deletions b/Collapse file
‎test/parallel/test-message-port.js‎
Copy file name to clipboardExpand all lines: test/parallel/test-message-port.js
+15Lines changed: 15 additions & 0 deletions
@@ -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();