3 files changed, 44 insertions, 0 deletions
diff --git a/dom/messagechannel/tests/unit/chromeWorker_messageChannel.js b/dom/messagechannel/tests/unit/chromeWorker_messageChannel.js
new file mode 100644
index 0000000000..3f557a4fb2
--- /dev/null
+++ b/dom/messagechannel/tests/unit/chromeWorker_messageChannel.js
@@ -0,0 +1,14 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+onmessage = function (pingEvt) {
+  if (pingEvt.data == "ping") {
+    let { port1, port2 } = new MessageChannel();
+    port2.onmessage = helloEvt => {
+      if (helloEvt.data == "hello") {
+        helloEvt.ports[0].postMessage("goodbye");
+      }
+    };
+    pingEvt.ports[0].postMessage("pong", [port1]);
+  }
+};
diff --git a/dom/messagechannel/tests/unit/test_messageChannel.js b/dom/messagechannel/tests/unit/test_messageChannel.js
new file mode 100644
index 0000000000..d672920f71
--- /dev/null
+++ b/dom/messagechannel/tests/unit/test_messageChannel.js
@@ -0,0 +1,23 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+add_test(function test_messageChannel() {
+  do_test_pending();
+
+  let chromeWorker = new ChromeWorker(
+    "resource://test/chromeWorker_messageChannel.js"
+  );
+  let { port1, port2 } = new MessageChannel();
+  port2.onmessage = pongEvt => {
+    Assert.equal(pongEvt.data, "pong");
+    let { port1: newPort1, port2: newPort2 } = new MessageChannel();
+    newPort2.onmessage = goodbyeEvt => {
+      Assert.equal(goodbyeEvt.data, "goodbye");
+
+      do_test_finished();
+      run_next_test();
+    };
+    pongEvt.ports[0].postMessage("hello", [newPort1]);
+  };
+  chromeWorker.postMessage("ping", [port1]);
+});
diff --git a/dom/messagechannel/tests/unit/xpcshell.ini b/dom/messagechannel/tests/unit/xpcshell.ini
new file mode 100644
index 0000000000..7164d1ea96
--- /dev/null
+++ b/dom/messagechannel/tests/unit/xpcshell.ini
@@ -0,0 +1,7 @@
+[DEFAULT]
+head =
+skip-if = toolkit == 'android'
+support-files =
+  chromeWorker_messageChannel.js
+
+[test_messageChannel.js]