test_reentrant_flush.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=709256

-->

<head>

  <title>Test for Bug 709256</title>

  <script 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" srcdoc="<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);

  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");

  window.requestAnimationFrame(function() {

    is(resizeHandlerRan, true, "Resize handler should have run");

    win.removeEventListener("resize", handleResize);

    SimpleTest.finish();

});

});

</script>

</pre>

</body>

</html>