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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>