From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dom/messagechannel/tests/chrome.toml               |  15 ++
 .../tests/iframe_messageChannel_chrome.html        |  11 +
 .../tests/iframe_messageChannel_cloning.html       |  21 ++
 .../tests/iframe_messageChannel_pingpong.html      |  32 +++
 .../tests/iframe_messageChannel_post.html          |  23 ++
 .../tests/iframe_messageChannel_sharedWorker2.html |  13 ++
 .../tests/iframe_messageChannel_transferable.html  |  24 +++
 dom/messagechannel/tests/mm_messageChannel.js      |  76 +++++++
 .../tests/mm_messageChannelParent.js               | 144 +++++++++++++
 .../tests/mm_messageChannelParent.xhtml            |  12 ++
 .../tests/mm_messageChannelParentNotRemote.xhtml   |  12 ++
 dom/messagechannel/tests/mochitest.toml            |  50 +++++
 dom/messagechannel/tests/moz.build                 |  10 +
 .../tests/sharedWorker2_messageChannel.js          |   9 +
 .../tests/sharedWorker_messageChannel.js           |  10 +
 .../tests/test_event_listener_leaks.html           |  50 +++++
 dom/messagechannel/tests/test_messageChannel.html  |  43 ++++
 dom/messagechannel/tests/test_messageChannel.xhtml |  38 ++++
 .../test_messageChannelWithMessageManager.xhtml    |  27 +++
 ...messageChannelWithMessageManagerNotRemote.xhtml |  27 +++
 .../tests/test_messageChannel_any.html             | 115 ++++++++++
 .../tests/test_messageChannel_bug1178076.html      |  38 ++++
 .../tests/test_messageChannel_bug1224825.html      |  94 +++++++++
 .../tests/test_messageChannel_cloning.html         |  70 ++++++
 .../tests/test_messageChannel_forceClose.html      |  30 +++
 .../tests/test_messageChannel_pingpong.html        |  77 +++++++
 .../tests/test_messageChannel_post.html            |  76 +++++++
 .../test_messageChannel_selfTransferring.html      |  32 +++
 .../tests/test_messageChannel_sharedWorker.html    |  36 ++++
 .../tests/test_messageChannel_sharedWorker2.html   |  34 +++
 .../tests/test_messageChannel_start.html           | 235 +++++++++++++++++++++
 .../tests/test_messageChannel_transferable.html    | 111 ++++++++++
 .../tests/test_messageChannel_unshipped.html       | 123 +++++++++++
 .../tests/test_messageChannel_worker.html          |  60 ++++++
 .../test_messageChannel_worker_forceClose.html     |  27 +++
 dom/messagechannel/tests/test_removedWindow.html   |  55 +++++
 .../tests/unit/chromeWorker_messageChannel.js      |  14 ++
 .../tests/unit/test_messageChannel.js              |  23 ++
 dom/messagechannel/tests/unit/xpcshell.toml        |   6 +
 dom/messagechannel/tests/worker_messageChannel.js  | 110 ++++++++++
 .../tests/worker_messageChannel_any.js             |   7 +
 41 files changed, 2020 insertions(+)
 create mode 100644 dom/messagechannel/tests/chrome.toml
 create mode 100644 dom/messagechannel/tests/iframe_messageChannel_chrome.html
 create mode 100644 dom/messagechannel/tests/iframe_messageChannel_cloning.html
 create mode 100644 dom/messagechannel/tests/iframe_messageChannel_pingpong.html
 create mode 100644 dom/messagechannel/tests/iframe_messageChannel_post.html
 create mode 100644 dom/messagechannel/tests/iframe_messageChannel_sharedWorker2.html
 create mode 100644 dom/messagechannel/tests/iframe_messageChannel_transferable.html
 create mode 100644 dom/messagechannel/tests/mm_messageChannel.js
 create mode 100644 dom/messagechannel/tests/mm_messageChannelParent.js
 create mode 100644 dom/messagechannel/tests/mm_messageChannelParent.xhtml
 create mode 100644 dom/messagechannel/tests/mm_messageChannelParentNotRemote.xhtml
 create mode 100644 dom/messagechannel/tests/mochitest.toml
 create mode 100644 dom/messagechannel/tests/moz.build
 create mode 100644 dom/messagechannel/tests/sharedWorker2_messageChannel.js
 create mode 100644 dom/messagechannel/tests/sharedWorker_messageChannel.js
 create mode 100644 dom/messagechannel/tests/test_event_listener_leaks.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel.xhtml
 create mode 100644 dom/messagechannel/tests/test_messageChannelWithMessageManager.xhtml
 create mode 100644 dom/messagechannel/tests/test_messageChannelWithMessageManagerNotRemote.xhtml
 create mode 100644 dom/messagechannel/tests/test_messageChannel_any.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_bug1178076.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_bug1224825.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_cloning.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_forceClose.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_pingpong.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_post.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_selfTransferring.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_sharedWorker.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_sharedWorker2.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_start.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_transferable.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_unshipped.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_worker.html
 create mode 100644 dom/messagechannel/tests/test_messageChannel_worker_forceClose.html
 create mode 100644 dom/messagechannel/tests/test_removedWindow.html
 create mode 100644 dom/messagechannel/tests/unit/chromeWorker_messageChannel.js
 create mode 100644 dom/messagechannel/tests/unit/test_messageChannel.js
 create mode 100644 dom/messagechannel/tests/unit/xpcshell.toml
 create mode 100644 dom/messagechannel/tests/worker_messageChannel.js
 create mode 100644 dom/messagechannel/tests/worker_messageChannel_any.js

(limited to 'dom/messagechannel/tests')

diff --git a/dom/messagechannel/tests/chrome.toml b/dom/messagechannel/tests/chrome.toml
new file mode 100644
index 0000000000..b66ebfbfd3
--- /dev/null
+++ b/dom/messagechannel/tests/chrome.toml
@@ -0,0 +1,15 @@
+[DEFAULT]
+support-files = [
+  "iframe_messageChannel_chrome.html",
+  "mm_messageChannelParent.xhtml",
+  "mm_messageChannelParentNotRemote.xhtml",
+  "mm_messageChannelParent.js",
+  "mm_messageChannel.js",
+]
+
+["test_messageChannel.xhtml"]
+
+["test_messageChannelWithMessageManager.xhtml"]
+skip-if = ["os == 'android'"]
+
+["test_messageChannelWithMessageManagerNotRemote.xhtml"]
diff --git a/dom/messagechannel/tests/iframe_messageChannel_chrome.html b/dom/messagechannel/tests/iframe_messageChannel_chrome.html
new file mode 100644
index 0000000000..5fcd43a34c
--- /dev/null
+++ b/dom/messagechannel/tests/iframe_messageChannel_chrome.html
@@ -0,0 +1,11 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+  <script type="application/javascript">
+
+window.addEventListener('message', receiveMessage);
+function receiveMessage(evt) {
+  evt.data.postMessage("Hello world");
+}
+  </script>
+</body>
diff --git a/dom/messagechannel/tests/iframe_messageChannel_cloning.html b/dom/messagechannel/tests/iframe_messageChannel_cloning.html
new file mode 100644
index 0000000000..3012f9a845
--- /dev/null
+++ b/dom/messagechannel/tests/iframe_messageChannel_cloning.html
@@ -0,0 +1,21 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+  <script type="application/javascript">
+
+  function ok(a, msg) {
+    window.parent.postMessage({ status: a ? "OK" : "KO", message: msg }, "*");
+  }
+
+  window.addEventListener('message', receiveMessage);
+  function receiveMessage(evt) {
+    ok (evt.data, "Data received");
+    ok (evt.data.port instanceof MessagePort, "Data contains a MessagePort");
+
+    var a = new MessageChannel();
+    window.parent.postMessage({ status: "FINISH", port: a.port2 }, '*', [a.port2]);
+  }
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/iframe_messageChannel_pingpong.html b/dom/messagechannel/tests/iframe_messageChannel_pingpong.html
new file mode 100644
index 0000000000..c4decd35a7
--- /dev/null
+++ b/dom/messagechannel/tests/iframe_messageChannel_pingpong.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+  <script type="application/javascript">
+
+  function ok(what, msg) {
+    window.parent.postMessage({type: what ? 'OK' : 'KO', msg }, '*');
+  }
+
+  window.addEventListener('message', receiveMessage);
+  function receiveMessage(evt) {
+    if (evt.data.type == 'PORT') {
+      var port = evt.data.port;
+      var counter = 0;
+      port.onmessage = function(event) {
+        if (counter++ == 0) {
+          ok(!(event.data % 2), "The number " + event.data + " has been received correctly by the iframe");
+
+          window.parent.postMessage({ type: 'PORT', port }, '*', [port]);
+        }
+        else {
+          ok(false, "Wrong message!");
+        }
+      }
+    } else {
+      ok(false, "Unknown message");
+    }
+  }
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/iframe_messageChannel_post.html b/dom/messagechannel/tests/iframe_messageChannel_post.html
new file mode 100644
index 0000000000..846b247f0b
--- /dev/null
+++ b/dom/messagechannel/tests/iframe_messageChannel_post.html
@@ -0,0 +1,23 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+  <script type="application/javascript">
+
+  var port;
+
+  window.addEventListener('message', receiveMessage);
+  function receiveMessage(evt) {
+    port = evt.data.port;
+
+    port.addEventListener('message', receivePostMessage);
+    function receivePostMessage(event) {
+      port.postMessage(event.data);
+    }
+    port.start();
+
+    window.parent.postMessage({ status: "READY" }, '*');
+  }
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/iframe_messageChannel_sharedWorker2.html b/dom/messagechannel/tests/iframe_messageChannel_sharedWorker2.html
new file mode 100644
index 0000000000..b96026955d
--- /dev/null
+++ b/dom/messagechannel/tests/iframe_messageChannel_sharedWorker2.html
@@ -0,0 +1,13 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+  <script type="application/javascript">
+
+  var a = new SharedWorker('sharedWorker2_messageChannel.js');
+  a.port.onmessage = function(evt) {
+    evt.ports[0].postMessage("Hello from the iframe!");
+  }
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/iframe_messageChannel_transferable.html b/dom/messagechannel/tests/iframe_messageChannel_transferable.html
new file mode 100644
index 0000000000..0a00add71f
--- /dev/null
+++ b/dom/messagechannel/tests/iframe_messageChannel_transferable.html
@@ -0,0 +1,24 @@
+<!DOCTYPE HTML>
+<html>
+<body>
+  <script type="application/javascript">
+
+  function ok(what, msg) {
+    window.parent.postMessage({type: what ? 'OK' : 'KO', msg }, '*');
+  }
+
+  window.addEventListener('message', receiveMessage);
+  function receiveMessage(evt) {
+    ok(evt.ports.length == 1, "Port transferred!");
+
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+    evt.ports[0].postMessage('hello world!', [a.port2]);
+    a.port1.onmessage = function(event) {
+      event.target.postMessage(event.data);
+    }
+  }
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/mm_messageChannel.js b/dom/messagechannel/tests/mm_messageChannel.js
new file mode 100644
index 0000000000..7acd5df530
--- /dev/null
+++ b/dom/messagechannel/tests/mm_messageChannel.js
@@ -0,0 +1,76 @@
+/* eslint-env mozilla/frame-script */
+
+function debug(msg) {
+  dump("[mmMessageChannelChild]" + msg + "\n");
+}
+
+/**
+ * Preparation Test
+ */
+let port;
+let toString = Object.prototype.toString;
+
+(function prepare() {
+  debug("Script loaded.");
+  addTestReceiver();
+  sendAsyncMessage("mmMessagePort:finishScriptLoad");
+})();
+
+function ok(condition, message) {
+  debug("condition: " + condition + ", " + message + "\n");
+  if (!condition) {
+    sendAsyncMessage("mmMessagePort:fail", { message });
+    throw new Error("failed check: " + message);
+  }
+}
+
+function is(a, b, message) {
+  ok(a === b, message);
+}
+
+/**
+ * Testing codes.
+ */
+function addTestReceiver() {
+  addMessageListener("BasicTest:PortCreated", basicTest);
+  addMessageListener("CloseTest:PortCreated", closeTest);
+  addMessageListener("EmptyTest:PortCreated", emptyTest);
+  addMessageListener("NotTransferableTest:PortCreated", notTransferableTest);
+}
+
+function basicTest(msg) {
+  port = msg.ports[0];
+  is(toString.call(port), "[object MessagePort]", "created MessagePort.");
+
+  port.onmessage = message => {
+    is(message.data, "BasicTest:StartTest", "Replied message is correct.");
+    port.postMessage("BasicTest:TestOK");
+  };
+
+  sendAsyncMessage("BasicTest:FinishPrepare", { message: "OK" });
+}
+
+function closeTest(msg) {
+  port = msg.ports[0];
+  is(toString.call(port), "[object MessagePort]", "created MessagePort.");
+
+  port.onmessage = message => {
+    ok(message.data, "CloseTest:StartTest", "Replied message is correct.");
+    port.postMessage("CloseTest:TestOK");
+  };
+
+  port.close();
+
+  sendAsyncMessage("CloseTest:FinishPrepare", { message: "OK" });
+}
+
+function emptyTest(msg) {
+  let portSize = msg.ports.length;
+  is(portSize, 0, "transfered port size is zero.");
+
+  sendAsyncMessage("EmptyTest:FinishPrepare", { message: "OK" });
+}
+
+function notTransferableTest(msg) {
+  sendAsyncMessage("NotTransferableTest:FinishPrepare", { message: "OK" });
+}
diff --git a/dom/messagechannel/tests/mm_messageChannelParent.js b/dom/messagechannel/tests/mm_messageChannelParent.js
new file mode 100644
index 0000000000..a5595722a2
--- /dev/null
+++ b/dom/messagechannel/tests/mm_messageChannelParent.js
@@ -0,0 +1,144 @@
+let port;
+let mm;
+
+function info(message) {
+  return window.arguments[0].info(message);
+}
+
+function ok(condition, message) {
+  return window.arguments[0].ok(condition, message);
+}
+
+function is(v1, v2, message) {
+  return window.arguments[0].is(v1, v2, message);
+}
+
+function todo_is(v1, v2, message) {
+  return window.arguments[0].todo_is(v1, v2, message);
+}
+
+function cleanUp() {
+  window.arguments[0].setTimeout(function () {
+    this.done();
+  }, 0);
+  window.close();
+}
+
+function debug(msg) {
+  dump("[mmMessageChannelParent]" + msg + "\n");
+}
+
+let tests = [basic_test, close_test, empty_transferable, not_transferable];
+
+// Test Routine
+function run_tests() {
+  let test = tests.shift();
+  if (test === undefined) {
+    cleanUp();
+    return;
+  }
+
+  test(function () {
+    setTimeout(run_tests, 0);
+  });
+}
+
+// Basic communication test.
+function basic_test(finish) {
+  ok(mm, "basic_test");
+
+  let finishPrepare = msg => {
+    is(msg.data.message, "OK", "");
+    ok(port, "");
+    port.onmessage = message => {
+      is(message.data, "BasicTest:TestOK", "");
+      finish();
+    };
+    port.postMessage("BasicTest:StartTest");
+    mm.removeMessageListener("BasicTest:FinishPrepare", finishPrepare);
+  };
+
+  let channel = new MessageChannel();
+  port = channel.port2;
+  mm.addMessageListener("BasicTest:FinishPrepare", finishPrepare);
+  mm.sendAsyncMessage("BasicTest:PortCreated", {}, [channel.port1]);
+}
+
+// Communicate with closed port.
+function close_test(finish) {
+  ok(mm, "close_test");
+
+  let finishPrepare = msg => {
+    is(msg.data.message, "OK", "");
+    ok(port, "");
+
+    port.onmessage = message => {
+      ok(false, "Port is alive.");
+      finish();
+    };
+
+    port.postMessage("CloseTest:StartTest");
+    mm.removeMessageListener("CloseTest:FinishPrepare", finishPrepare);
+    finish();
+  };
+
+  let channel = new MessageChannel();
+  port = channel.port2;
+  mm.addMessageListener("CloseTest:FinishPrepare", finishPrepare);
+  mm.sendAsyncMessage("CloseTest:PortCreated", {}, [channel.port1]);
+}
+
+// Empty transferable object
+function empty_transferable(finish) {
+  ok(mm, "empty_transferable");
+
+  let finishPrepare = msg => {
+    ok(true, "Same basic test.");
+    mm.removeMessageListener("EmptyTest:FinishPrepare", finishPrepare);
+    finish();
+  };
+
+  mm.addMessageListener("EmptyTest:FinishPrepare", finishPrepare);
+  mm.sendAsyncMessage("EmptyTest:PortCreated", {}, []);
+}
+
+// Not transferable object.
+function not_transferable(finish) {
+  ok(mm, "not_transferable");
+
+  let finishPrepare = msg => {
+    ok(true, "Same basic test.");
+    finish();
+  };
+
+  mm.addMessageListener("NotTransferableTest:FinishPrepare", finishPrepare);
+  mm.sendAsyncMessage("NotTransferableTest:PortCreated", {}, [""]);
+}
+
+/*
+ * Test preparation
+ */
+function finishLoad(msg) {
+  run_tests();
+}
+
+function prepare_test() {
+  debug("start run_tests()");
+  var node = document.getElementById("messagechannel_remote");
+  mm = node.messageManager; //Services.ppmm.getChildAt(1);
+  ok(mm, "created MessageManager.");
+
+  mm.addMessageListener("mmMessagePort:finishScriptLoad", finishLoad);
+  mm.addMessageListener("mmMessagePort:fail", failed_test);
+  //mm.loadProcessScript("chrome://mochitests/content/chrome/dom/messagechannel/tests/mm_messageChannel.js", true);
+  mm.loadFrameScript(
+    "chrome://mochitests/content/chrome/dom/messagechannel/tests/mm_messageChannel.js",
+    true
+  );
+  ok(true, "Loaded");
+}
+
+function failed_test() {
+  debug("failed test in child process");
+  ok(false, "");
+}
diff --git a/dom/messagechannel/tests/mm_messageChannelParent.xhtml b/dom/messagechannel/tests/mm_messageChannelParent.xhtml
new file mode 100644
index 0000000000..5f5c5ae5be
--- /dev/null
+++ b/dom/messagechannel/tests/mm_messageChannelParent.xhtml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<window title="Test MessageChannel API with nsFrameMessageManager(bug 1174624)"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="prepare_test()">
+
+  <!-- test code goes here -->
+  <script type="application/javascript"
+          src="chrome://mochitests/content/chrome/dom/messagechannel/tests/mm_messageChannelParent.js"></script>
+  <browser type="content" src="about:blank" id="messagechannel_remote" remote="true"/>
+</window>
diff --git a/dom/messagechannel/tests/mm_messageChannelParentNotRemote.xhtml b/dom/messagechannel/tests/mm_messageChannelParentNotRemote.xhtml
new file mode 100644
index 0000000000..cb3b55dea7
--- /dev/null
+++ b/dom/messagechannel/tests/mm_messageChannelParentNotRemote.xhtml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<window title="Test MessageChannel API with nsFrameMessageManager(bug 1174624)"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="prepare_test()">
+
+  <!-- test code goes here -->
+  <script type="application/javascript"
+          src="chrome://mochitests/content/chrome/dom/messagechannel/tests/mm_messageChannelParent.js"></script>
+  <browser type="content" src="about:blank" id="messagechannel_remote"/>
+</window>
diff --git a/dom/messagechannel/tests/mochitest.toml b/dom/messagechannel/tests/mochitest.toml
new file mode 100644
index 0000000000..f01cd65786
--- /dev/null
+++ b/dom/messagechannel/tests/mochitest.toml
@@ -0,0 +1,50 @@
+[DEFAULT]
+support-files = [
+  "iframe_messageChannel_cloning.html",
+  "iframe_messageChannel_pingpong.html",
+  "iframe_messageChannel_post.html",
+  "iframe_messageChannel_transferable.html",
+  "worker_messageChannel.js",
+  "worker_messageChannel_any.js",
+  "sharedWorker_messageChannel.js",
+  "sharedWorker2_messageChannel.js",
+  "iframe_messageChannel_sharedWorker2.html",
+  "!/dom/events/test/event_leak_utils.js",
+]
+
+["test_event_listener_leaks.html"]
+skip-if = ["os == 'linux' && bits == 64"] # Bug 1777087
+
+["test_messageChannel.html"]
+
+["test_messageChannel_any.html"]
+
+["test_messageChannel_bug1178076.html"]
+
+["test_messageChannel_bug1224825.html"]
+
+["test_messageChannel_cloning.html"]
+
+["test_messageChannel_forceClose.html"]
+
+["test_messageChannel_pingpong.html"]
+
+["test_messageChannel_post.html"]
+
+["test_messageChannel_selfTransferring.html"]
+
+["test_messageChannel_sharedWorker.html"]
+
+["test_messageChannel_sharedWorker2.html"]
+
+["test_messageChannel_start.html"]
+
+["test_messageChannel_transferable.html"]
+
+["test_messageChannel_unshipped.html"]
+
+["test_messageChannel_worker.html"]
+
+["test_messageChannel_worker_forceClose.html"]
+
+["test_removedWindow.html"]
diff --git a/dom/messagechannel/tests/moz.build b/dom/messagechannel/tests/moz.build
new file mode 100644
index 0000000000..5c3978f075
--- /dev/null
+++ b/dom/messagechannel/tests/moz.build
@@ -0,0 +1,10 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+MOCHITEST_MANIFESTS += ["mochitest.toml"]
+MOCHITEST_CHROME_MANIFESTS += ["chrome.toml"]
+
+XPCSHELL_TESTS_MANIFESTS += ["unit/xpcshell.toml"]
diff --git a/dom/messagechannel/tests/sharedWorker2_messageChannel.js b/dom/messagechannel/tests/sharedWorker2_messageChannel.js
new file mode 100644
index 0000000000..d5084fe766
--- /dev/null
+++ b/dom/messagechannel/tests/sharedWorker2_messageChannel.js
@@ -0,0 +1,9 @@
+/* eslint-env worker */
+
+var mc = new MessageChannel();
+var i = 0;
+
+onconnect = function (evt) {
+  dump("CONNECTING: " + i + "\n");
+  evt.ports[0].postMessage(42, [mc["port" + ++i]]);
+};
diff --git a/dom/messagechannel/tests/sharedWorker_messageChannel.js b/dom/messagechannel/tests/sharedWorker_messageChannel.js
new file mode 100644
index 0000000000..874860e99f
--- /dev/null
+++ b/dom/messagechannel/tests/sharedWorker_messageChannel.js
@@ -0,0 +1,10 @@
+/* eslint-env worker */
+
+onconnect = function (evt) {
+  var mc = new MessageChannel();
+
+  evt.ports[0].postMessage(42, [mc.port2]);
+  mc.port1.onmessage = function (e) {
+    mc.port1.postMessage(e.data);
+  };
+};
diff --git a/dom/messagechannel/tests/test_event_listener_leaks.html b/dom/messagechannel/tests/test_event_listener_leaks.html
new file mode 100644
index 0000000000..93ed5215d3
--- /dev/null
+++ b/dom/messagechannel/tests/test_event_listener_leaks.html
@@ -0,0 +1,50 @@
+<!--
+  Any copyright is dedicated to the Public Domain.
+  http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Bug 1450358 - Test MessageChannel event listener leak conditions</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/dom/events/test/event_leak_utils.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<script class="testbody" type="text/javascript">
+// Manipulate MessageChannel objects in the frame's context.
+// Its important here that we create a listener callback from
+// the DOM objects back to the frame's global in order to
+// exercise the leak condition.
+async function useMessagePort(contentWindow) {
+  contentWindow.messageCount = 0;
+
+  let mc = new contentWindow.MessageChannel
+  mc.port1.postMessage("foo");
+
+  await new Promise(resolve => {
+    mc.port2.onmessage = e => {
+      contentWindow.messageCount += 1;
+      resolve();
+    };
+  });
+
+  is(contentWindow.messageCount, 1, "message should be received");
+}
+
+async function runTest() {
+  try {
+    await checkForEventListenerLeaks("MessageChannel", useMessagePort);
+  } catch (e) {
+    ok(false, e);
+  } finally {
+    SimpleTest.finish();
+  }
+}
+
+SimpleTest.waitForExplicitFinish();
+addEventListener("load", runTest, { once: true });
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel.html b/dom/messagechannel/tests/test_messageChannel.html
new file mode 100644
index 0000000000..ce6774d33c
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel.html
@@ -0,0 +1,43 @@
+
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - basic support</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  <iframe name="x" id="x"></iframe>
+  <iframe name="y" id="y"></iframe>
+</div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  /** Test for Bug 677638 **/
+  var a = new MessageChannel();
+  ok(a, "MessageChannel created");
+
+  var port1 = a.port1;
+  ok(port1, "MessageChannel.port1 exists");
+  is(port1, a.port1, "MessageChannel.port1 is port1");
+
+  var port2 = a.port2;
+  ok(port2, "MessageChannel.port1 exists");
+  is(port2, a.port2, "MessageChannel.port2 is port2");
+
+  [ 'postMessage', 'start', 'close' ].forEach(function(e) {
+    ok(e in port1, "MessagePort1." + e + " exists");
+    ok(e in port2, "MessagePort2." + e + " exists");
+  });
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel.xhtml b/dom/messagechannel/tests/test_messageChannel.xhtml
new file mode 100644
index 0000000000..e51359d67d
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel.xhtml
@@ -0,0 +1,38 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<window title="Test for MessageChannel API"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml" id="body">
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+  ok("MessageChannel" in window, "Should MessageChannel exist?");
+
+  var channel = new MessageChannel();
+  ok(channel, "MessageChannel is created");
+
+  channel.port1.onmessage = function(evt) {
+    ok(true, "message received!");
+    SimpleTest.finish();
+  }
+
+  var ifr = document.createXULElement('browser');
+  ifr.setAttribute("src", "iframe_messageChannel_chrome.html");
+  ifr.setAttribute("flex", "1");
+  ifr.addEventListener('load', function() {
+    ifr.contentWindow.postMessage(channel.port2, '*', [channel.port2]);
+  });
+
+  var body = document.getElementById("body");
+  body.appendChild(ifr);
+
+  SimpleTest.waitForExplicitFinish();
+
+  ]]></script>
+</window>
diff --git a/dom/messagechannel/tests/test_messageChannelWithMessageManager.xhtml b/dom/messagechannel/tests/test_messageChannelWithMessageManager.xhtml
new file mode 100644
index 0000000000..b95a85645c
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannelWithMessageManager.xhtml
@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
+                 type="text/css"?>
+<window title="Test MessageChannel API with nsFrameMessageManager(bug 1174624)"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+  SimpleTest.waitForExplicitFinish();
+
+  function done() {
+    info("done called");
+    SimpleTest.finish();
+  }
+
+  addLoadEvent(function() {
+    window.openDialog("mm_messageChannelParent.xhtml", "", "chrome,noopener", window);
+  });
+  ]]></script>
+</window>
diff --git a/dom/messagechannel/tests/test_messageChannelWithMessageManagerNotRemote.xhtml b/dom/messagechannel/tests/test_messageChannelWithMessageManagerNotRemote.xhtml
new file mode 100644
index 0000000000..e87fd4d873
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannelWithMessageManagerNotRemote.xhtml
@@ -0,0 +1,27 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
+                 type="text/css"?>
+<window title="Test MessageChannel API with nsFrameMessageManager(bug 1174624)"
+  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  </body>
+
+  <!-- test code goes here -->
+  <script type="application/javascript"><![CDATA[
+
+  SimpleTest.waitForExplicitFinish();
+
+  function done() {
+    info("done called");
+    SimpleTest.finish();
+  }
+
+  addLoadEvent(function() {
+    window.openDialog("mm_messageChannelParentNotRemote.xhtml", "", "chrome,noopener", window);
+  });
+  ]]></script>
+</window>
diff --git a/dom/messagechannel/tests/test_messageChannel_any.html b/dom/messagechannel/tests/test_messageChannel_any.html
new file mode 100644
index 0000000000..e4498b243f
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_any.html
@@ -0,0 +1,115 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>MessagePort/Channel any content</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+var tests = [
+ 'hello world',
+ 123,
+ null,
+ true,
+ new Date(),
+ [ 1, 'test', true, new Date() ],
+ { a: true, b:  null, c: new Date(), d: [ true, false, {} ] },
+ new Blob([123], { type: 'plain/text' })
+];
+
+var currentTest = null;
+
+function getType(a) {
+  if (a === null || a === undefined)
+    return 'null';
+
+  if (Array.isArray(a))
+    return 'array';
+
+  if (typeof a == 'object')
+    return 'object';
+
+  return 'primitive';
+}
+
+function compare(a, b) {
+  is (getType(a), getType(b), 'Type matches');
+
+  var type = getType(a);
+  if (type == 'array') {
+    is (a.length, b.length, 'Array.length matches');
+    for (var i = 0; i < a.length; ++i) {
+      compare(a[i], b[i]);
+    }
+
+    return;
+  }
+
+  if (type == 'object') {
+    ok (a !== b, 'They should not match');
+
+    var aProps = [];
+    for (let p in a) aProps.push(p);
+
+    var bProps = [];
+    for (let p in b) bProps.push(p);
+
+    is (aProps.length, bProps.length, 'Props match');
+    is (aProps.sort().toString(), bProps.sort().toString(), 'Prop names match');
+
+    for (let p in a) {
+      compare(a[p], b[p]);
+    }
+
+    return;
+  }
+
+  if (type != 'null') {
+    is (a, b, 'Same value');
+  }
+}
+
+function runTest() {
+  var mc = new MessageChannel('foobar');
+  ok(mc, "MessageChannel can be created");
+
+  mc.port1.onmessage = function(event) {
+    compare(event.data, currentTest);
+    next();
+  }
+
+  function next() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    currentTest = tests.shift();
+    mc.port1.postMessage(currentTest);
+  }
+
+  var worker = new Worker("worker_messageChannel_any.js");
+  worker.onmessage = function(event) {
+    if (event.data == "READY") {
+      next();
+    }
+  };
+
+  worker.postMessage(mc.port2, [mc.port2]);
+}
+
+SimpleTest.waitForExplicitFinish();
+runTest();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_bug1178076.html b/dom/messagechannel/tests/test_messageChannel_bug1178076.html
new file mode 100644
index 0000000000..e8d4d3b9fb
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_bug1178076.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1178076
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1178076</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1178076">Mozilla Bug 1178076</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function runTest() {
+    onmessage = function(e) {
+      is(e.ports.length, 1, "A port has been received!");
+      var port = e.ports[0];
+      ok(port instanceof MessagePort, "This is a port.");
+      SimpleTest.finish();
+    }
+
+    // In this test we want to see if we leak a neutered port closing port1
+    // and sending port2 to the same window. This operation doesn't involve IPC.
+    var mc = new MessageChannel();
+    mc.port1.close();
+    postMessage(42, '*', [mc.port2]);
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTest();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_bug1224825.html b/dom/messagechannel/tests/test_messageChannel_bug1224825.html
new file mode 100644
index 0000000000..067fb1581f
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_bug1224825.html
@@ -0,0 +1,94 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1224825
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1224825</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1224825">Mozilla Bug 1224825</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+var MAX = 100;
+
+function test_fullDeliveredMessages() {
+  var worker = new Worker('data:javascript,onmessage = function(e) { e.ports[0].onmessage = function(evt) { postMessage(evt.data);}}');
+
+  var count = 0;
+  worker.onmessage = function(e) {
+    is(e.data, count, "Correct value expected!");
+    ok(count < MAX,"No count > MAX messages!");
+    if (++count == MAX) {
+
+      SimpleTest.requestFlakyTimeout("Testing an event not happening");
+      setTimeout(function() {
+        runTests();
+      }, 200);
+
+      info("All the messages correctly received");
+    }
+  }
+
+  var mc = new MessageChannel();
+  worker.postMessage(42, [mc.port2]);
+
+  for (let i = 0; i < MAX; ++i) {
+    mc.port1.postMessage(i);
+  }
+
+  mc.port1.close();
+
+  for (let i = 0; i < MAX * 2; ++i) {
+    mc.port1.postMessage(i);
+  }
+}
+
+function test_closeInBetween() {
+  var mc = new MessageChannel();
+
+  for (var i = 0; i < MAX; ++i) {
+    mc.port1.postMessage(i);
+  }
+
+  mc.port1.onmessage = function(e) {
+    ok (e.data < MAX/2, "Correct message received from port1:" + e.data);
+  }
+
+  mc.port2.onmessage = function(e) {
+    ok (e.data < MAX, "Correct message received from port2:" + e.data);
+    if (e.data == MAX/2) {
+      mc.port2.close();
+    }
+
+    mc.port2.postMessage(e.data);
+
+    if (e.data == MAX - 1) {
+      runTests();
+    }
+  }
+}
+
+var tests = [ test_fullDeliveredMessages, test_closeInBetween ];
+
+function runTests() {
+  if (!tests.length) {
+    SimpleTest.finish();
+    return;
+  }
+
+  var test = tests.shift();
+  test();
+}
+
+SimpleTest.waitForExplicitFinish();
+runTests();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_cloning.html b/dom/messagechannel/tests/test_messageChannel_cloning.html
new file mode 100644
index 0000000000..7f59e9e96f
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_cloning.html
@@ -0,0 +1,70 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - port cloning</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  // This test checks if MessagePorts can be shared with iframes
+  function test_iframe() {
+    window.addEventListener('message', receiveMessage);
+    function receiveMessage(evt) {
+      if (evt.data.status == 'OK') {
+        ok(true, evt.data.message);
+      } else if (evt.data.status == 'KO') {
+        ok(false, evt.data.message);
+      } else if (evt.data.status == 'FINISH') {
+        ok (evt.data.port instanceof MessagePort, "Data contains a MessagePort");
+        window.removeEventListener('message', receiveMessage);
+        runTest();
+      } else {
+        ok(false, "Unknown message");
+      }
+    }
+
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    var div = document.getElementById("content");
+    ok(div, "Parent exists");
+
+    var ifr = document.createElement("iframe");
+    ifr.addEventListener("load", iframeLoaded);
+    ifr.setAttribute('src', "iframe_messageChannel_cloning.html");
+    div.appendChild(ifr);
+
+    function iframeLoaded() {
+      ifr.contentWindow.postMessage({ port: a.port2 }, '*', [a.port2]);
+    }
+  }
+
+  var tests = [
+    test_iframe
+  ];
+
+  function runTest() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    var test = tests.shift();
+    test();
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTest();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_forceClose.html b/dom/messagechannel/tests/test_messageChannel_forceClose.html
new file mode 100644
index 0000000000..98c9e87311
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_forceClose.html
@@ -0,0 +1,30 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1176034
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1176034 - start/close</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1176034">Mozilla Bug 1176034</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  var mc = new MessageChannel();
+
+  try {
+    postMessage(42, "*", [ mc.port1, window ]);
+    ok(false, "Something went wrong.");
+  } catch(e) {
+    ok(true, "PostMessage should fail and we should not leak.");
+  }
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_pingpong.html b/dom/messagechannel/tests/test_messageChannel_pingpong.html
new file mode 100644
index 0000000000..602478bcb7
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_pingpong.html
@@ -0,0 +1,77 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - port cloning</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function runTest() {
+    var MAX = 100;
+
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    // Populate the message queue of this port.
+    for (var i = 0; i < MAX; ++i) {
+      a.port1.postMessage(i);
+    }
+
+    window.addEventListener('message', receiveMessage);
+    function receiveMessage(evt) {
+
+      // This test sends the port from this window to the iframe and viceversa.
+      if (evt.data.type == 'PORT') {
+        var port = evt.data.port;
+        var counter = 0;
+        port.onmessage = function(event) {
+          // only 1 message should be received by this port.
+          if (counter++ == 0) {
+            ok(event.data % 2, "The number " + event.data + " has been received correctly by the main window");
+
+            if (event.data < MAX - 1) {
+              ifr.contentWindow.postMessage({ type: 'PORT', port }, '*', [port]);
+            } else {
+              SimpleTest.finish();
+            }
+          } else {
+            ok(false, "Wrong message!");
+          }
+        }
+      } else if (evt.data.type == 'OK') {
+        ok(true, evt.data.msg);
+      } else if (evt.data.type == 'KO') {
+        ok(false, evt.data.msg);
+      } else {
+        ok(false, "Unknown message");
+      }
+    }
+
+    var div = document.getElementById("content");
+    ok(div, "Parent exists");
+
+    var ifr = document.createElement("iframe");
+    ifr.addEventListener("load", iframeLoaded);
+    ifr.setAttribute('src', "iframe_messageChannel_pingpong.html");
+    div.appendChild(ifr);
+
+    function iframeLoaded() {
+      ifr.contentWindow.postMessage({ type: 'PORT', port: a.port2 }, '*', [a.port2]);
+    }
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTest();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_post.html b/dom/messagechannel/tests/test_messageChannel_post.html
new file mode 100644
index 0000000000..86c27efc3e
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_post.html
@@ -0,0 +1,76 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - port cloning</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function start() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    window.addEventListener('message', receiveMessage);
+    function receiveMessage(evt) {
+      if (evt.data.status == 'READY') {
+        runTest();
+      } else {
+        ok(false, "Unknown message");
+      }
+    }
+
+    var div = document.getElementById("content");
+    ok(div, "Parent exists");
+
+    var ifr = document.createElement("iframe");
+    ifr.addEventListener("load", iframeLoaded);
+    ifr.setAttribute('src', "iframe_messageChannel_post.html");
+    div.appendChild(ifr);
+
+    function iframeLoaded() {
+      ifr.contentWindow.postMessage({ port: a.port2 }, '*', [a.port2]);
+    }
+
+    var tests = [ 42,
+                  null,
+                  undefined,
+                  "hello world",
+                  new Blob([]),
+                  true ];
+
+    a.port1.onmessage = function(evt) {
+      ok(tests.length, "We are waiting for a message");
+      if (typeof(tests[0]) == 'object') {
+        is(typeof(tests[0]), typeof(evt.data), "Value ok: " + tests[0]);
+      } else {
+        is(tests[0], evt.data, "Value ok: " + tests[0]);
+      }
+      tests.shift();
+      runTest();
+    }
+
+    function runTest() {
+      if (!tests.length) {
+        SimpleTest.finish();
+        return;
+      }
+
+      a.port1.postMessage(tests[0]);
+    }
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  start();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_selfTransferring.html b/dom/messagechannel/tests/test_messageChannel_selfTransferring.html
new file mode 100644
index 0000000000..b5c1b1e886
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_selfTransferring.html
@@ -0,0 +1,32 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>MessagePort/Channel no self tranferring</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  var a = new MessageChannel();
+
+  var messageStatus = false;
+  try {
+    a.port1.postMessage('foobar', [a.port1]);
+  } catch(e) {
+    messageStatus = true;
+  }
+
+  ok(messageStatus, "Transfering the same port should throw");
+
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_sharedWorker.html b/dom/messagechannel/tests/test_messageChannel_sharedWorker.html
new file mode 100644
index 0000000000..cf1864579f
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_sharedWorker.html
@@ -0,0 +1,36 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - sharedWorker</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  <iframe name="x" id="x"></iframe>
+  <iframe name="y" id="y"></iframe>
+</div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  var a = new SharedWorker('sharedWorker_messageChannel.js');
+  a.port.onmessage = function(evt) {
+    is(evt.ports.length, 1, "We received a port.");
+    evt.ports[0].onmessage = function(e) {
+      is(e.data, 42, "Message reiceved back!");
+      SimpleTest.finish();
+    }
+    evt.ports[0].postMessage(42);
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_sharedWorker2.html b/dom/messagechannel/tests/test_messageChannel_sharedWorker2.html
new file mode 100644
index 0000000000..8b8f259308
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_sharedWorker2.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - sharedWorker</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+  <div id="content"></div>
+
+  <script type="application/javascript">
+
+  var iframe = document.createElement('iframe');
+  iframe.setAttribute('src', "iframe_messageChannel_sharedWorker2.html");
+  document.getElementById('content').appendChild(iframe);
+
+  var a = new SharedWorker('sharedWorker2_messageChannel.js');
+  a.port.onmessage = function(evt) {
+    is(evt.ports.length, 1, "We received a port.");
+    evt.ports[0].onmessage = function(e) {
+      is(e.data, "Hello from the iframe!", "Message reiceved from the iframe!");
+      SimpleTest.finish();
+    }
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_start.html b/dom/messagechannel/tests/test_messageChannel_start.html
new file mode 100644
index 0000000000..4bc49cc0d6
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_start.html
@@ -0,0 +1,235 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - start/close</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function runTests() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    var test = tests.shift();
+    test();
+  }
+
+  function testOnMessage() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    var events = 2;
+
+    a.port1.onmessage = function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    }
+
+    a.port2.onmessage = function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    }
+  }
+
+  function testAddEventListener() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    a.port1.addEventListener('message', function(evt) {
+      ok(false, "This method should not be called");
+    });
+
+    a.port2.addEventListener('message', function(evt) {
+      ok(false, "This method should not be called");
+    });
+
+    setTimeout(runTests, 0);
+  }
+
+  function testAddEventListenerAndStart() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    var events = 2;
+
+    a.port1.addEventListener('message', function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    });
+
+    a.port2.addEventListener('message', function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    });
+
+    a.port1.start();
+    a.port2.start();
+  }
+
+  function testAddEventListener1AndStart() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    var events = 1;
+
+    a.port1.addEventListener('message', function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    });
+
+    a.port2.addEventListener('message', function(evt) {
+      ok(false, "This method should not be called");
+    });
+
+    a.port1.start();
+  }
+
+  function testAddEventListener2AndStart() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    var events = 1;
+
+    a.port1.addEventListener('message', function(evt) {
+      ok(false, "This method should not be called");
+    });
+
+    a.port2.addEventListener('message', function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    });
+
+    a.port2.start();
+  }
+
+  function testTimer() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    setTimeout(function() {
+      var events = 2;
+      a.port1.onmessage = function(evt) {
+        ok(true, "This method should be called");
+        if (!--events) runTests();
+      }
+
+      a.port2.onmessage = function(evt) {
+        ok(true, "This method should be called");
+        if (!--events) runTests();
+      }
+    }, 200);
+  }
+
+  function testAddEventListenerAndStartWrongOrder() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    var events = 2;
+
+    a.port1.start();
+    a.port1.addEventListener('message', function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    });
+
+    a.port2.start();
+    a.port2.addEventListener('message', function(evt) {
+      ok(true, "This method should be called");
+      if (!--events) runTests();
+    });
+  }
+
+  function testOnMessageClone() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    a.port1.postMessage(42);
+    a.port2.postMessage(43);
+    ok(true, "MessagePort{1,2}.postmessage() invoked");
+
+    var events = 2;
+
+    addEventListener('message', testOnMessageCloneCb, false);
+    function testOnMessageCloneCb(event) {
+      a.port1.onmessage = function(evt) {
+        ok(true, "This method should be called");
+        testOnMessageCloneFinish();
+      }
+
+      event.data.onmessage = function(evt) {
+        ok(true, "This method should be called");
+        testOnMessageCloneFinish();
+      }
+
+      a.port2.onmessage = function(evt) {
+        ok(false, "This method should not be called");
+      }
+    }
+
+    function testOnMessageCloneFinish() {
+      if (!--events) {
+        removeEventListener('message', testOnMessageCloneCb);
+        runTests();
+      }
+    }
+
+    postMessage(a.port2, '*', [a.port2]);
+  }
+
+  var tests = [
+    testOnMessage,
+    testAddEventListener,
+    testAddEventListenerAndStart,
+    testAddEventListener1AndStart,
+    testAddEventListener2AndStart,
+    testTimer,
+    testAddEventListenerAndStartWrongOrder,
+    testOnMessageClone,
+  ];
+
+  SimpleTest.waitForExplicitFinish();
+  SimpleTest.requestFlakyTimeout("untriaged");
+  runTests();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_transferable.html b/dom/messagechannel/tests/test_messageChannel_transferable.html
new file mode 100644
index 0000000000..44a27b34c4
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_transferable.html
@@ -0,0 +1,111 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - port cloning</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function basic_test() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    window.addEventListener('message', receiveMessage);
+    function receiveMessage(evt) {
+      if (evt.data.status == 'READY') {
+        a.port1.postMessage({ab, cb: ab}, [ab]);
+        ok(ab.byteLength == 0, "PostMessage - The size is: 0 == " + ab.byteLength)
+      } else {
+        ok(false, "Unknown message");
+      }
+    }
+
+    var div = document.getElementById("content");
+    ok(div, "Parent exists");
+
+    var ifr = document.createElement("iframe");
+    ifr.addEventListener("load", iframeLoaded);
+    ifr.setAttribute('src', "iframe_messageChannel_post.html");
+    div.appendChild(ifr);
+
+    function iframeLoaded() {
+      ifr.contentWindow.postMessage({ port: a.port2 }, '*', [a.port2]);
+    }
+
+    a.port1.addEventListener('message', receivePortMessage);
+    function receivePortMessage(evt) {
+      is(evt.data.ab.byteLength, size, "The size is: " + size + " == " + ab.byteLength);
+      window.removeEventListener('message', receiveMessage);
+      runTests();
+    }
+
+    // Start() is not implicity invoked when addEventListener is used.
+    a.port1.start();
+
+    var size = 1024 * 1024 * 32;
+    var ab = new ArrayBuffer(size);
+    is(ab.byteLength, size, "The size is: " + size + " == " + ab.byteLength);
+  }
+
+  function port_test() {
+    window.addEventListener('message', receiveMessage);
+    function receiveMessage(evt) {
+      ok(evt.data.type == 'OK', evt.data.msg);
+    }
+
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    var div = document.getElementById("content");
+    ok(div, "Parent exists");
+
+    var ifr = document.createElement("iframe");
+    ifr.addEventListener("load", iframeLoaded);
+    ifr.setAttribute('src', "iframe_messageChannel_transferable.html");
+    div.appendChild(ifr);
+
+    function iframeLoaded() {
+      ifr.contentWindow.postMessage('foobar!', '*', [a.port2]);
+    }
+
+    a.port1.onmessage = function(evt) {
+      ok(evt.ports.length == 1, "Iframe sent a new port!");
+      evt.ports[0].onmessage = function(event) {
+        is(event.data, "hello world!", "Message sent and received!");
+        runTests();
+      }
+
+      evt.ports[0].postMessage("hello world!");
+    }
+  }
+
+  var tests = [
+    basic_test,
+    port_test
+  ];
+
+  function runTests() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    var t = tests.shift();
+    t();
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTests();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_unshipped.html b/dom/messagechannel/tests/test_messageChannel_unshipped.html
new file mode 100644
index 0000000000..44bf56979c
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_unshipped.html
@@ -0,0 +1,123 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - unshipped message port queue</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  function test_orderedMessages() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    var b = new MessageChannel();
+    ok(b, "MessageChannel created");
+
+    var expectedNumber = 1;
+    function testEvent(number, id) {
+      is(expectedNumber, number, "This is the right number!");
+      ok(!((expectedNumber - id) % 4), "From the right port: " + expectedNumber + " " + id);
+      expectedNumber++;
+
+      if (expectedNumber >100) {
+        runTests();
+      }
+    }
+
+    a.port1.onmessage = function(evt) {
+      testEvent(evt.data, 2);
+    };
+
+    a.port2.onmessage = function(evt) {
+      testEvent(evt.data, 1);
+    };
+
+    b.port1.onmessage = function(evt) {
+      testEvent(evt.data, 4);
+    };
+
+    b.port2.onmessage = function(evt) {
+      testEvent(evt.data, 3);
+    };
+
+    for (var i = 0; i < 100;) {
+      a.port1.postMessage(++i);
+      a.port2.postMessage(++i);
+      b.port1.postMessage(++i);
+      b.port2.postMessage(++i);
+    }
+  }
+
+  function test_unstarted() {
+    var a = new MessageChannel();
+    ok(a, "MessageChannel created");
+
+    var b = new MessageChannel();
+    ok(b, "MessageChannel created");
+
+    var expectedNumber = 1;
+    function testEvent(number, id) {
+      is(expectedNumber, number, "This is the right number!");
+      ok(!((expectedNumber - id) % 3), "From the right port: " + expectedNumber + " " + id);
+      expectedNumber++;
+
+      // 102 because it's the first multiple of 3.
+      if (expectedNumber > 102) {
+        runTests();
+      }
+    }
+
+    a.port1.onmessage = function(evt) {
+      testEvent(evt.data, 2);
+    };
+
+    a.port2.onmessage = function(evt) {
+      testEvent(evt.data, 1);
+    };
+
+    b.port1.addEventListener("message", function() {
+      ok(false, "shouldn't be called");
+    });
+
+    b.port2.onmessage = function(evt) {
+      testEvent(evt.data, 3);
+    };
+
+    for (var i = 0; i < 100;) {
+      a.port1.postMessage(++i);
+      a.port2.postMessage(++i);
+      b.port1.postMessage(++i);
+      b.port2.postMessage(1000);
+    }
+  }
+
+  var tests = [
+    test_orderedMessages,
+    test_unstarted
+  ];
+
+  function runTests() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    var test = tests.shift();
+    test();
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTests();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_worker.html b/dom/messagechannel/tests/test_messageChannel_worker.html
new file mode 100644
index 0000000000..742212a5d3
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_worker.html
@@ -0,0 +1,60 @@
+
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=677638
+-->
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 677638 - basic support</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=677638">Mozilla Bug 677638</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  <iframe name="x" id="x"></iframe>
+  <iframe name="y" id="y"></iframe>
+</div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  var tests = [ 0, 3 ];
+
+  function runTests() {
+    if (!tests.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    var a = new Worker('worker_messageChannel.js');
+    a.onmessage = function(evt) {
+      if (evt.data.type == 'finish') {
+        runTests();
+      } else if (evt.data.type == 'info') {
+        info(evt.data.message);
+      } else if (evt.data.type == 'check') {
+        ok(evt.data.check, evt.data.message);
+      } else if (evt.data.type == 'port') {
+        is(evt.ports.length, 1, "A port has been received!");
+        evt.ports[0].onmessage = function(e) {
+          e.target.postMessage(e.data);
+        }
+      } else if (evt.data.type == 'newport') {
+        var ch = new MessageChannel();
+        ok(ch, "MessageChannel created");
+        ch.port1.postMessage(42);
+        a.postMessage('a gift!', [ch.port2]);
+      }
+    }
+
+    a.postMessage(tests.shift());
+  }
+
+  SimpleTest.waitForExplicitFinish();
+  runTests();
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_messageChannel_worker_forceClose.html b/dom/messagechannel/tests/test_messageChannel_worker_forceClose.html
new file mode 100644
index 0000000000..8de3450fb5
--- /dev/null
+++ b/dom/messagechannel/tests/test_messageChannel_worker_forceClose.html
@@ -0,0 +1,27 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for forcing the closing of the port in workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<div id="content"></div>
+<pre id="test">
+</pre>
+  <script type="application/javascript">
+
+  var worker = new Worker('data:javascript,onmessage = function(e) { "doing nothing with this port"; }');
+
+  var mc = new MessageChannel();
+  worker.postMessage(42, [mc.port2]);
+
+  for (var i = 0; i < 10; ++i) {
+    mc.port1.postMessage(i);
+  }
+
+  ok(true, "All the messages are sent! We should shutdown correctly.");
+  </script>
+</body>
+</html>
diff --git a/dom/messagechannel/tests/test_removedWindow.html b/dom/messagechannel/tests/test_removedWindow.html
new file mode 100644
index 0000000000..b660000fd8
--- /dev/null
+++ b/dom/messagechannel/tests/test_removedWindow.html
@@ -0,0 +1,55 @@
+<!DOCTYPE html>
+<title>MessagePort should not work when created from a disconnected window</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+
+<body>
+<script>
+"use strict";
+
+SimpleTest.waitForExplicitFinish();
+runTest();
+
+async function runTest() {
+  let ifr = document.createElement('iframe');
+  await new Promise(resolve => {
+    ifr.onload = resolve;
+    ifr.src = 'support/empty.html';
+    document.body.appendChild(ifr);
+  });
+
+  let w = ifr.contentWindow;
+
+  let pre = new w.MessageChannel();
+  ok(!!pre, "We have a channel");
+
+  ifr.remove();
+
+  let post = new w.MessageChannel();
+  ok(!!post, "We have a channel");
+
+  // This should silently fail.
+  pre.port1.postMessage(42);
+  pre.port2.onmessage = e => {
+    ok(false, "No messages should be received!");
+  }
+
+  // This should silently fail.
+  post.port1.postMessage(42);
+  post.port2.onmessage = e => {
+    ok(false, "No messages should be received!");
+  }
+
+  // Let's use another MessagePort just to be sure no messages are received by
+  // port2.
+
+  let mc = new MessageChannel();
+  mc.port1.postMessage(42);
+  mc.port2.onmessage = e => {
+    ok(true, "Ready to complete the test");
+    SimpleTest.finish();
+  }
+}
+
+</script>
+</body>
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.toml b/dom/messagechannel/tests/unit/xpcshell.toml
new file mode 100644
index 0000000000..ea6d7d1862
--- /dev/null
+++ b/dom/messagechannel/tests/unit/xpcshell.toml
@@ -0,0 +1,6 @@
+[DEFAULT]
+head =  ""
+skip-if = ["os == 'android'"]
+support-files = ["chromeWorker_messageChannel.js"]
+
+["test_messageChannel.js"]
diff --git a/dom/messagechannel/tests/worker_messageChannel.js b/dom/messagechannel/tests/worker_messageChannel.js
new file mode 100644
index 0000000000..f0b97ee36c
--- /dev/null
+++ b/dom/messagechannel/tests/worker_messageChannel.js
@@ -0,0 +1,110 @@
+function ok(a, msg) {
+  postMessage({ type: "check", check: !!a, message: msg });
+}
+
+function is(a, b, msg) {
+  ok(a === b, msg);
+}
+
+function info(msg) {
+  postMessage({ type: "info", message: msg });
+}
+
+function finish() {
+  postMessage({ type: "finish" });
+}
+
+function basic() {
+  var a = new MessageChannel();
+  ok(a, "MessageChannel created");
+
+  var port1 = a.port1;
+  ok(port1, "MessageChannel.port1 exists");
+  is(port1, a.port1, "MessageChannel.port1 is port1");
+
+  var port2 = a.port2;
+  ok(port2, "MessageChannel.port1 exists");
+  is(port2, a.port2, "MessageChannel.port2 is port2");
+
+  ["postMessage", "start", "close"].forEach(function (e) {
+    ok(e in port1, "MessagePort1." + e + " exists");
+    ok(e in port2, "MessagePort2." + e + " exists");
+  });
+
+  runTests();
+}
+
+function sendMessages() {
+  var a = new MessageChannel();
+  ok(a, "MessageChannel created");
+
+  a.port1.postMessage("Hello world!");
+  a.port1.onmessage = function (e) {
+    is(e.data, "Hello world!", "The message is back!");
+    runTests();
+  };
+
+  a.port2.onmessage = function (e) {
+    a.port2.postMessage(e.data);
+  };
+}
+
+function transferPort() {
+  var a = new MessageChannel();
+  ok(a, "MessageChannel created");
+
+  a.port1.postMessage("Hello world!");
+  a.port1.onmessage = function (e) {
+    is(e.data, "Hello world!", "The message is back!");
+    runTests();
+  };
+
+  postMessage({ type: "port" }, [a.port2]);
+}
+
+function transferPort2() {
+  onmessage = function (evt) {
+    is(evt.ports.length, 1, "A port has been received by the worker");
+    evt.ports[0].onmessage = function (e) {
+      is(e.data, 42, "Data is 42!");
+      runTests();
+    };
+  };
+
+  postMessage({ type: "newport" });
+}
+
+var tests = [basic, sendMessages, transferPort, transferPort2];
+
+function runTests() {
+  if (!tests.length) {
+    finish();
+    return;
+  }
+
+  var t = tests.shift();
+  t();
+}
+
+var subworker;
+onmessage = function (evt) {
+  if (evt.data == 0) {
+    runTests();
+    return;
+  }
+
+  if (!subworker) {
+    info("Create a subworkers. ID: " + evt.data);
+    subworker = new Worker("worker_messageChannel.js");
+    subworker.onmessage = function (e) {
+      info("Proxy a message to the parent.");
+      postMessage(e.data, e.ports);
+    };
+
+    subworker.postMessage(evt.data - 1);
+    return;
+  }
+
+  info("Dispatch a message to the subworker.");
+  subworker.postMessage(evt.data, evt.ports);
+};
diff --git a/dom/messagechannel/tests/worker_messageChannel_any.js b/dom/messagechannel/tests/worker_messageChannel_any.js
new file mode 100644
index 0000000000..11018da9a0
--- /dev/null
+++ b/dom/messagechannel/tests/worker_messageChannel_any.js
@@ -0,0 +1,7 @@
+onmessage = function (evt) {
+  evt.data.onmessage = function (event) {
+    evt.data.postMessage(event.data);
+  };
+};
+
+postMessage("READY");
-- 
cgit v1.2.3