1 files changed, 54 insertions, 0 deletions
diff --git a/dom/events/test/test_bug502818.html b/dom/events/test/test_bug502818.html
new file mode 100644
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+++ b/dom/events/test/test_bug502818.html
@@ -0,0 +1,54 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=502818
+-->
+<head>
+  <title>Test for Bug 502818</title>
+  <script type="application/javascript" 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=502818">Mozilla Bug 502818</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 502818 **/
+
+  var count = 0;
+
+  function listener(evt) {
+    ++count;
+    is(evt.foo, 'bar', "Event.prototype should be accessible from " + evt.type);
+  }
+
+  Event.prototype.foo = 'bar';
+  window.addEventListener('DOMMouseScroll', listener, false);
+  window.addEventListener('MozMousePixelScroll', listener, false);
+  window.addEventListener('foobar', listener, false);
+
+  var e = document.createEvent("mousescrollevents");
+  e.initMouseScrollEvent("DOMMouseScroll", true, true, window,
+                         0, 0, 0, 0, 0, false, false, false, false,
+                         0, null, 1);
+  window.dispatchEvent(e);
+
+  e.initMouseScrollEvent("MozMousePixelScroll", true, true, window,
+                         0, 0, 0, 0, 0, false, false, false, false,
+                         0, null, 1);
+  window.dispatchEvent(e);
+
+  e.initMouseScrollEvent("foobar", true, true, window,
+                         0, 0, 0, 0, 0, false, false, false, false,
+                         0, null, 1);
+  window.dispatchEvent(e);
+
+  is(count, 3, "Wrong number tests run!");
+</script>
+</pre>
+</body>
+</html>