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Test Info:

<title>Test for Bug 1279202</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<body onload="run()">
<iframe src="resize_flush_iframe.html" id="iframe" height="200" width="200" style="border:none"></iframe>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 1279202 **/
function run() {
var iframe = document.getElementById("iframe");
var doc = iframe.contentDocument.documentElement;
var win = iframe.contentWindow;
var body = iframe.contentDocument.body;
// Flush any pending layout changes before we start.
var width = doc.clientWidth;
// Resize the iframe
iframe.width = '300px';
// Flush pending style changes, but not layout ones. We do this twice because the first flush
// does a partial flush of the resize (setting the size on the pres context) which sets the
// need style flush flag again. The second call makes sure mNeedStyleFlush is false.
var color = win.getComputedStyle(body).getPropertyValue("background-color");
color = win.getComputedStyle(body).getPropertyValue("background-color");
is(color, "rgb(0, 128, 0)", "Style flush not completed when resizing an iframe!");
// Query the size of the inner document and make sure it has had a layout flush.
width = doc.clientWidth;
is(width, 300, "Layout flush not completed when resizing an iframe!");