gecko-dev/dom/base/test/test_reentrant_flush.html

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HTML

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=709256
-->
<head>
<title>Test for Bug 709256</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=709256">Mozilla Bug 709256</a>
<p id="display">
<iframe id="test"
style="width: 100px" src="data:text/html,<body style='width: 100%'>">
</iframe>
</p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 709256 **/
SimpleTest.waitForExplicitFinish();
addLoadEvent(function() {
var ifr = $("test");
var bod = ifr.contentDocument.body;
is(bod.getBoundingClientRect().width, 100,
"Width of body should be 100px to start with");
var resizeHandlerRan = false;
function handleResize() {
resizeHandlerRan = true;
is(bod.getBoundingClientRect().width, 50,
"Width of body should now be 50px");
}
var win = ifr.contentWindow;
win.addEventListener("resize", handleResize, false);
SpecialPowers.setFullZoom(win, 2);
is(resizeHandlerRan, false,
"Resize handler should not have run yet for this test to be valid");
// Now flush out layout on the subdocument, to trigger the resize handler
is(bod.getBoundingClientRect().width, 50, "Width of body should still be 50px");
is(resizeHandlerRan, true, "Resize handler should have run");
win.removeEventListener("resize", handleResize, false);
SimpleTest.finish();
});
</script>
</pre>
</body>
</html>