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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1451199
+-->
+<head>
+ <meta charset="utf-8">
+ <title>Test for Bug 1451199</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+ <script type="application/javascript">
+
+ /** Test for Bug 1451199 **/
+ SimpleTest.waitForExplicitFinish();
+
+ addLoadEvent(function() {
+ // We have to be careful to not check l.matches until the very end
+ // of the test.
+ var l = frames[0].matchMedia("(orientation: portrait)");
+ var iframe = document.querySelector("iframe");
+ iframe.width = "50";
+ iframe.contentDocument.documentElement.offsetWidth; // Flush layout
+
+ l.addEventListener("change", function() {
+ is(l.matches, false,
+ "Should not match portrait by the time we get notified");
+ SimpleTest.finish();
+ });
+ iframe.width = "200";
+ });
+ </script>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1451199">Mozilla Bug 1451199</a>
+<p id="display"><iframe height="100" width="200"></iframe></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+</pre>
+</body>
+</html>