<?xml version="1.0"?> <?xml-stylesheet type="text/css" href="chrome://global/skin"?> <?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=804630 --> <window title="Mozilla Bug 804630" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/> <!-- 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=804630" target="_blank">Mozilla Bug 804630</a> </body> <!-- test code goes here --> <script type="application/javascript"> <![CDATA[ /** Test to make sure that COWed objects can expose properties from their prototypes. **/ const Cu = Components.utils; // Set up the sandbox. var sb = new Cu.Sandbox('http://www.example.com'); sb.ok = ok; sb.is = is; // Make a chrome object that exposes objects off its prototype. sb.proto = { read: 42, readWrite: 32, __exposedProps__: {} }; sb.obj = { __exposedProps__: { read: 'r', readWrite: 'rw' } }; sb.obj.__proto__ = sb.proto; // Make sure we can't access any of the properties on the prototype directly. Cu.evalInSandbox('is(proto.read, undefined, "proto.read inaccessible");', sb); Cu.evalInSandbox('var wrote = false; ' + 'try { proto.readWrite = 12; wrote = true; } catch(e) {} ' + ' ok(!wrote, "Should not write proto property");', sb); // Make sure we can access the exposed properties via the derived object. Cu.evalInSandbox('is(obj.read, 42, "obj.read accessible");', sb); Cu.evalInSandbox('is(obj.readWrite, 32, "obj.readWrite is readable");', sb); Cu.evalInSandbox('obj.readWrite = 8; is(obj.readWrite, 8, "obj.readWrite is writable");', sb); ]]> </script> </window>