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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=887541
+-->
+<head>
+  <title>Test for event model in web components</title>
+  <script type="text/javascript" src="head.js"></script>
+  <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=887541">Bug 887541</a>
+<script>
+
+var els = SpecialPowers.Cc["@mozilla.org/eventlistenerservice;1"]
+            .getService(SpecialPowers.Ci.nsIEventListenerService);
+
+SimpleTest.waitForExplicitFinish();
+createIframe()
+  .then((aDocument) => {
+    function eventListener(e) {
+      eventChain.push(this);
+    }
+
+    function isEventChain(actual, expected, msg) {
+      is(actual.length, expected.length, msg);
+      for (var i = 0; i < expected.length; i++) {
+        is(actual[i], expected[i], msg + " at " + i);
+      }
+
+      if (actual.length) {
+        var chain = els.getEventTargetChainFor(actual[0], false); // Events should be dispatched on actual[0].
+        ok(expected.length < chain.length, "There should be additional chrome event targets.");
+      }
+    }
+
+    /*
+     * <div elemOne> ------ <shadow-root shadowOne>
+     *                                 |
+     *                          <span elemTwo>
+     *                                 |
+     *                         <span elemThree>
+     */
+
+    var elemOne = aDocument.createElement("div");
+    var elemTwo = aDocument.createElement("span");
+    var elemThree = aDocument.createElement("span");
+    var shadowOne = elemOne.attachShadow({mode: "open"});
+
+    shadowOne.appendChild(elemTwo);
+    elemTwo.appendChild(elemThree);
+
+    // Test stopping "abort" event.
+
+    elemOne.addEventListener("abort", eventListener);
+    elemTwo.addEventListener("abort", eventListener);
+    elemThree.addEventListener("abort", eventListener);
+    shadowOne.addEventListener("abort", eventListener);
+
+    var eventChain = [];
+
+    var customEvent = new CustomEvent("abort", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that abort event is stopped at shadow root.");
+
+    // Test stopping "error" event.
+
+    elemOne.addEventListener("error", eventListener);
+    elemTwo.addEventListener("error", eventListener);
+    elemThree.addEventListener("error", eventListener);
+    shadowOne.addEventListener("error", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("error", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that error event is stopped at shadow root.");
+
+    // Test stopping "select" event.
+
+    elemOne.addEventListener("select", eventListener);
+    elemTwo.addEventListener("select", eventListener);
+    elemThree.addEventListener("select", eventListener);
+    shadowOne.addEventListener("select", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("select", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that select event is stopped at shadow root.");
+
+    // Test stopping "change" event.
+
+    elemOne.addEventListener("change", eventListener);
+    elemTwo.addEventListener("change", eventListener);
+    elemThree.addEventListener("change", eventListener);
+    shadowOne.addEventListener("change", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("change", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+
+    // Test stopping "reset" event.
+
+    elemOne.addEventListener("reset", eventListener);
+    elemTwo.addEventListener("reset", eventListener);
+    elemThree.addEventListener("reset", eventListener);
+    shadowOne.addEventListener("reset", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("reset", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that reset event is stopped at shadow root.");
+
+    // Test stopping "load" event.
+
+    elemOne.addEventListener("load", eventListener);
+    elemTwo.addEventListener("load", eventListener);
+    elemThree.addEventListener("load", eventListener);
+    shadowOne.addEventListener("load", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("load", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that load event is stopped at shadow root.");
+
+    // Test stopping "resize" event.
+
+    elemOne.addEventListener("resize", eventListener);
+    elemTwo.addEventListener("resize", eventListener);
+    elemThree.addEventListener("resize", eventListener);
+    shadowOne.addEventListener("resize", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("resize", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that resize event is stopped at shadow root.");
+
+    // Test stopping "scroll" event.
+
+    elemOne.addEventListener("scroll", eventListener);
+    elemTwo.addEventListener("scroll", eventListener);
+    elemThree.addEventListener("scroll", eventListener);
+    shadowOne.addEventListener("scroll", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("scroll", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that scroll event is stopped at shadow root.");
+
+    // Test stopping "selectstart" event.
+
+    elemOne.addEventListener("selectstart", eventListener);
+    elemTwo.addEventListener("selectstart", eventListener);
+    elemThree.addEventListener("selectstart", eventListener);
+    shadowOne.addEventListener("selectstart", eventListener);
+
+    eventChain = [];
+
+    customEvent = new CustomEvent("selectstart", { "bubbles" : true });
+    elemThree.dispatchEvent(customEvent);
+    isEventChain(eventChain, [elemThree, elemTwo, shadowOne], "Test that selectstart event is stopped at shadow root.");
+
+    SimpleTest.finish();
+  });
+</script>
+</body>
+</html>