gecko-dev/image/test/mochitest/test_bug89419-2.html

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=89419
-->
<head>
  <title>Test for Bug 89419</title>
  <script type="application/javascript" src="/MochiKit/MochiKit.js"></script>
  <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="/tests/SimpleTest/WindowSnapshot.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=89419">Mozilla Bug 89419</a>
<p id="display"></p>
<pre id="test">
<script type="application/javascript">

var first, second, third;
var correct, val1, val2;

SimpleTest.waitForExplicitFinish();

function checkFirst()
{
  var iframeelem = document.getElementById('test-iframe');
  first = snapshotWindow(iframeelem.contentWindow, false);

  iframeelem.onload = checkSecond;
  iframeelem.contentWindow.location.href = iframeelem.contentWindow.location.href;
}

function checkSecond()
{
  var iframeelem = document.getElementById('test-iframe');
  second = snapshotWindow(iframeelem.contentWindow, false);

  // Check that we actually reloaded.
  [correct, val1, val2] = compareSnapshots(first, second, false);
  ok(correct, "Image should have changed after the first reload.");

  iframeelem.onload = checkThird;
  iframeelem.contentWindow.location.href = iframeelem.contentWindow.location.href;
}

function checkThird()
{
  var iframeelem = document.getElementById('test-iframe');
  third = snapshotWindow(iframeelem.contentWindow, false);

  // Check that we actually reloaded.
  [correct, val1, val2] = compareSnapshots(second, third, false);
  ok(correct, "Image should have changed after the second reload.");

  // Make sure we looped back to the first image.
  [correct, val1, val2] = compareSnapshots(first, third, true);
  ok(correct, "Third image should match first image.");

  SimpleTest.finish();
}

</script>
</pre>
<div id="content"> <!-- style="display: none" -->
<iframe id="test-iframe" src="bug89419-iframe.html" onload="checkFirst()"></iframe>
</div>
</body>
</html>