test_bug985988.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=985988

-->

<head>

  <meta charset="utf-8">

  <title>Test for Bug 985988</title>

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

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

  <script type="application/javascript">

  /** Test for Bug 985988 **/

  function handler() {

    return false;

  function reversedHandler() {

    return true;

  function test() {

    var t = document.getElementById("testtarget");

    t.onclick = handler;

    var e = new MouseEvent("click", {cancelable: true});

    t.dispatchEvent(e);

    ok(e.defaultPrevented, "Should have prevented default handling.");

    t.onclick = reversedHandler;

    e = new MouseEvent("click", {cancelable: true});

    t.dispatchEvent(e);

    ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");

    t.onmouseover = handler;

    e = new MouseEvent("mouseover", {cancelable: true});

    t.dispatchEvent(e);

    ok(e.defaultPrevented, "Should have prevented default handling.");

    t.onmouseover = reversedHandler;

    e = new MouseEvent("mouseover", {cancelable: true});

    t.dispatchEvent(e);

    ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");

    // error does not have reversed meaning for handler return value on

    // non-globals.

    t.onerror = handler;

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

    t.dispatchEvent(e);

    ok(e.defaultPrevented, "Should have prevented default handling.");

    t.onerror = reversedHandler;

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

    t.dispatchEvent(e);

    ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");

    // error has reversed meaning for handler return value on globals.

    t = document.getElementById("testtarget2").contentWindow;

    t.onerror = reversedHandler;

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

    t.dispatchEvent(e);

    ok(e.defaultPrevented, "Should have prevented default handling.");

    t.onerror = handler;

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

    t.dispatchEvent(e);

    ok(!e.defaultPrevented, "Shouldn't have prevented default handling.");

    SimpleTest.finish();

  SimpleTest.waitForExplicitFinish();

  addLoadEvent(test);

  </script>

</head>

<body onload="test()">

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=985988">Mozilla Bug 985988</a>

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

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

</div>

<a href="#" id="testtarget">test target</a>

<iframe id="testtarget2"></iframe>

<pre id="test">

</pre>

</body>

</html>