test_bug449781.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=449781

-->

<head>

  <title>Test for Bug 449781</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <script 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=449781">Mozilla Bug 449781</a>

<p id="display">Canary</p>

<iframe src="about:blank" id="ourFrame" style="visibility: hidden">

</iframe>

</div>

<pre id="test">

<script class="testbody" type="text/javascript">

var s1, s2, s3, s4;

/** Test for Bug 449781 **/

SimpleTest.waitForExplicitFinish();

addLoadEvent(function() {

  s1 = snapshotWindow(window);

  $("ourFrame").style.display = "none";

  is($("ourFrame").offsetWidth, 0, "Unexpected width after hiding");

  $("ourFrame").style.display = "";

  is($("ourFrame").clientWidth, 300, "Unexpected width after showing");

  s2 = snapshotWindow(window);

  var equal, str1, str2;

  [equal, str1, str2] = compareSnapshots(s1, s2, true);

  ok(equal, "Show/hide should have no effect - " +

     "got " + str1 + " but expected " + str2);

  SpecialPowers.setFullZoom($("ourFrame").contentWindow, 2);

  s3 = snapshotWindow(window);

  [equal, str1, str2] = compareSnapshots(s1, s3, true);

  ok(equal, "Zoom should have no effect - " +

     "got " + str1 + " but expected " + str2);

  $("display").style.display = "none";

  s4 = snapshotWindow(window);

  [equal, str1, str2] = compareSnapshots(s3, s4, true);

  ok(!equal, "Should be able to see the canary");

  SimpleTest.finish();

});

</script>

</pre>

</body>

</html>