gecko-dev/layout/style/test/test_bug771043.html

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HTML

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=771043
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 771043</title>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script type="application/javascript">
/** Test for Bug 771043 **/
var expectedValue;
var callCount = 0;
var storedHeight;
function callback(arg) {
++callCount;
is(arg.matches, expectedValue,
"Should have the right value on call #" + callCount + " to the callback");
SimpleTest.executeSoon(tests.shift());
}
function flushLayout() {
storedHeight = document.querySelector("iframe").offsetHeight;
}
function setHeight(height) {
var ifr = document.querySelector("iframe");
ifr.style.height = height + "px";
flushLayout();
}
SimpleTest.waitForExplicitFinish();
var tests = [
() => { expectedValue = true; setHeight(50); },
() => { expectedValue = false; setHeight(200); },
() => {
var ifr = document.querySelector("iframe");
ifr.style.display = "none";
flushLayout();
ifr.style.display = "";
expectedValue = true;
setHeight(50);
},
() => { expectedValue = false; setHeight(200); },
SimpleTest.finish.bind(SimpleTest)
];
addLoadEvent(function() {
var mql = frames[0].matchMedia("(orientation: landscape)");
mql.addListener(callback);
tests.shift()();
});
</script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=771043">Mozilla Bug 771043</a>
<!-- Important: the iframe needs to be displayed -->
<p id="display"><iframe style="width: 100px; height: 200px"</p>
<div id="content" style="display: none">
</div>
<pre id="test">
</pre>
</body>
</html>