test_bug517851.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=517851

-->

<head>

  <title>Test for Bug 517851</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=517851">Mozilla Bug 517851</a>

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

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

  <iframe id="subframe"></iframe>

</div>

<pre id="test">

<script type="application/javascript">

/** Test for Bug 517851 **/

SimpleTest.waitForExplicitFinish();

addLoadEvent(function() {

window.handledCount = 0;

window.testReturnValue = false;

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

var target2 = $("subframe").contentDocument.body;

target.setAttribute("onerror", "++window.handledCount; return window.testReturnValue;");

target2.setAttribute("onerror", "++window.parent.handledCount; return window.parent.testReturnValue;");

target.setAttribute("onmouseover", "++window.handledCount; return window.testReturnValue;");

target.setAttribute("onbeforeunload", "++window.handledCount; return window.testReturnValue;");

target2.setAttribute("onbeforeunload", "++window.parent.handledCount; return window.parent.testReturnValue;");

target.setAttribute("onmousemove", "++window.handledCount; return window.testReturnValue;");

var e = new ErrorEvent("error", {bubbles: true, cancelable: true});

window.testReturnValue = true;

is(target.dispatchEvent(e), window.testReturnValue,

   "error event should not have reverse return value handling on div!");

is(handledCount, 1, "Wrong event count!");

window.testReturnValue = false;

is(target.dispatchEvent(e), window.testReturnValue,

   "error event should not have reverse return value handling on div (2)!");

is(handledCount, 2, "Wrong event count!");

var e = new ErrorEvent("error", {bubbles: true, cancelable: true});

window.testReturnValue = false;

is(target2.dispatchEvent(e), !window.testReturnValue,

   "error event should have reverse return value handling!");

is(handledCount, 3, "Wrong event count!");

window.testReturnValue = true;

is(target2.dispatchEvent(e), !window.testReturnValue,

   "error event should have reverse return value handling (2)!");

is(handledCount, 4, "Wrong event count!");

e = document.createEvent("MouseEvent");

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

window.testReturnValue = true;

is(target.dispatchEvent(e), window.testReturnValue,

   "mouseover event should not have reverse return value handling!");

is(handledCount, 5, "Wrong event count!");

window.testReturnValue = false;

is(target.dispatchEvent(e), window.testReturnValue,

   "mouseover event should not have reverse return value handling (2)!");

is(handledCount, 6, "Wrong event count!");

e = document.createEvent("BeforeUnloadEvent");

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

window.testReturnValue = true;

is(target.dispatchEvent(e), true,

   "beforeunload event on random element should not be prevented!");

is(handledCount, 6, "Wrong event count; handler should not have run!");

is(target2.dispatchEvent(e), false,

   "beforeunload event should be prevented!");

is(handledCount, 7, "Wrong event count!");

window.testReturnValue = false;

is(target.dispatchEvent(e), false,

   "beforeunload event on random element should be prevented because the event was already cancelled!");

is(handledCount, 7, "Wrong event count; handler should not have run! (2)");

e = document.createEvent("BeforeUnloadEvent");

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

window.testReturnValue = false;

is(target.dispatchEvent(e), true,

   "beforeunload event on random element should not be prevented (2)!");

is(handledCount, 7, "Wrong event count; handler should not have run! (2)");

is(target2.dispatchEvent(e), false,

   "beforeunload event should be prevented (2)!");

is(handledCount, 8, "Wrong event count!");

// Create normal event for beforeunload.

e = document.createEvent("Event");

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

window.testReturnValue = true;

is(target.dispatchEvent(e), true,

   "beforeunload event shouldn't be prevented (3)!");

is(handledCount, 8, "Wrong event count: handler should not have run(3)!");

is(target2.dispatchEvent(e), true,

   "beforeunload event shouldn't be prevented (3)!");

is(handledCount, 9, "Wrong event count!");

e = document.createEvent("MouseEvent");

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

window.testReturnValue = true;

is(target.dispatchEvent(e), window.testReturnValue,

   "mousemove event shouldn't have reverse return value handling!");

is(handledCount, 10, "Wrong event count!");

window.testReturnValue = false;

is(target.dispatchEvent(e), window.testReturnValue,

   "mousemove event shouldn't have reverse return value handling (2)!");

is(handledCount, 11, "Wrong event count!");

// Now unhook the beforeunload handler in the subframe, so we don't prompt to

// unload.

target2.onbeforeunload = null;

SimpleTest.finish();

});

</script>

</pre>

</body>

</html>