test_bug656954.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=656954

-->

<head>

  <title>Test for Bug 656954</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=656954">Mozilla Bug 656954</a>

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

<div id="content" style="display: none">

</div>

<pre id="test">

<script type="application/javascript">

/** Test for Bug 656954 **/

var e = document.createEvent("Event");

is(e.defaultPrevented, false,

   "After creating event defaultPrevented should be false");

e.initEvent("foo", true, true);

var el = document.createElement("div");

el.addEventListener("foo",

  function(evt) {

    evt.preventDefault();

});

el.dispatchEvent(e);

is(e.defaultPrevented, true, "preventDefault() should have been called!");

e = document.createEvent("Event");

e.initEvent("foo", true, false);

el.dispatchEvent(e);

is(e.defaultPrevented, false, "preventDefault() should not have any effect!");

</script>

</pre>

</body>

</html>