js/xpconnect/tests/chrome/test_exposeInDerived.xhtml

   1 <?xml version="1.0"?>
   2 <?xml-stylesheet type="text/css" href="chrome://global/skin"?>
   3 <?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
   4 <!--
   5 https://bugzilla.mozilla.org/show_bug.cgi?id=804630
   6 -->
   7 <window title="Mozilla Bug 804630"
   8         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
   9   <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
  10
  11   <!-- test results are displayed in the html:body -->
  12   <body xmlns="http://www.w3.org/1999/xhtml">
  13   <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=804630"
  14      target="_blank">Mozilla Bug 804630</a>
  15   </body>
  16
  17   <!-- test code goes here -->
  18   <script type="application/javascript">
  19   <![CDATA[
  20   /** Test to make sure that COWed objects can't expose properties from their prototypes. **/
  21   // Set up the sandbox.
  22   var sb = new Cu.Sandbox("https://www.example.com");
  23   sb.ok = ok;
  24   sb.is = is;
  25
  26   // Make a chrome object that tries to expose objects off its prototype.
  27   sb.proto = { read: 42, readWrite: 32 };
  28   sb.obj = {};
  29   sb.obj.__proto__ = sb.proto;
  30
  31   // Make sure we can't access any of the properties on the prototype directly.
  32   Cu.evalInSandbox('is(proto.read, undefined, "proto.read inaccessible");', sb);
  33   Cu.evalInSandbox('var wrote = false; ' +
  34                    'try { proto.readWrite = 12; wrote = true; } catch(e) {} ' +
  35                    ' ok(!wrote, "Should not write proto property");', sb);
  36
  37   // Make sure we can't access the exposed properties via the derived object.
  38   Cu.evalInSandbox('is(obj.read, undefined, "obj.read inaccessible");', sb);
  39   Cu.evalInSandbox('is(obj.readWrite, undefined, "obj.readWrite is not readable");', sb);
  40   Cu.evalInSandbox('try { obj.readWrite = 8; ok(false, "obj.readWrite is not writable"); } catch (e) {};',
  41                    sb);
  42
  43   ]]>
  44   </script>
  45 </window>