gecko/js/xpconnect/tests/chrome/test_bug720619.xul

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<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
type="text/css"?>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=720619
-->
<window title="Mozilla Bug 720619"
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<script type="application/javascript"
src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<!-- test results are displayed in the html:body -->
<body xmlns="http://www.w3.org/1999/xhtml">
<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=720619"
target="_blank">Mozilla Bug 720619</a>
<!-- test code goes here -->
<script type="application/javascript"><![CDATA[
/** Test for Bug 720619 **/
const Cu = Components.utils;
var obj = {
valueOf: function () {
return 42;
},
toString: function () {
return 'str';
}
};
var content = new Cu.Sandbox("about:blank");
content.obj = obj;
ok(Cu.evalInSandbox("obj + ''", content) == "[object Object]");
ok(Cu.evalInSandbox("'' + obj", content) == "[object Object]");
ok(isNaN(Cu.evalInSandbox("obj - 0", content)));
ok(Cu.evalInSandbox("String(obj)", content) == "[object Object]");
var chrome = new Cu.Sandbox(window);
chrome.obj = obj;
ok(Cu.evalInSandbox("obj + ''", chrome) == "42");
ok(Cu.evalInSandbox("'' + obj", chrome) == "42");
ok(Cu.evalInSandbox("obj - 0", chrome) == 42);
ok(Cu.evalInSandbox("String(obj)", chrome) == "str");
]]></script>
</body>
</window>