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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=620906
+-->
+<head>
+ <title>Test for Bug 620906</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <script type="text/javascript" src="/tests/SimpleTest/EventUtils.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=620906">Mozilla Bug 620906</a>
+<p id="display"></p>
+<div id="content">
+ <iframe src="data:text/html,
+ <body contenteditable
+ onmousedown='
+ document.designMode=&quot;on&quot;;
+ document.designMode=&quot;off&quot;;
+ '
+ >
+ <div style='height: 1000px;'></div>
+ </body>">
+ </iframe>
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 620906 **/
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(function() {
+ var iframe = document.querySelector("iframe");
+ is(iframe.contentWindow.scrollY, 0, "Sanity check");
+ var rect = iframe.getBoundingClientRect();
+ setTimeout(function() {
+ var onscroll = function () {
+ iframe.contentWindow.removeEventListener("scroll", onscroll, false);
+ isnot(iframe.contentWindow.scrollY, 0, "The scrollbar should work");
+ SimpleTest.finish();
+ }
+ iframe.contentWindow.addEventListener("scroll", onscroll, false);
+ synthesizeMouse(iframe, rect.width - 5, rect.height / 2, {});
+ }, 0);
+});
+
+</script>
+</pre>
+</body>
+</html>