js/xpconnect/tests/chrome/test_bug1390159.xhtml

   1 <?xml version="1.0"?>
   2 <?xml-stylesheet href="chrome://global/skin" type="text/css"?>
   3 <?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
   4                  type="text/css"?>
   5 <!--
   6 https://bugzilla.mozilla.org/show_bug.cgi?id=1390159
   7 -->
   8 <window title="Mozilla Bug 1390159"
   9   xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
  10   <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  11
  12   <!-- test code goes here -->
  13   <script type="application/javascript"><![CDATA[
  14     function test() {
  15       var xulRuntime = Services.appinfo;
  16
  17       // Make sure it has an inSafeMode property. This is just an arbitrary
  18       // readonly property.
  19       var oldValue = xulRuntime.inSafeMode;
  20       is(typeof oldValue, "boolean", "Expected an inSafeMode property");
  21
  22       // Changing a readonly property doesn't throw, but shouldn't change
  23       // the value.
  24       xulRuntime.inSafeMode = !oldValue;
  25       is(xulRuntime.inSafeMode, oldValue, "Should not have modified prop");
  26
  27       // Adding a new property should throw.
  28       let ex = null;
  29       try {
  30         xulRuntime.foobar = 1;
  31       } catch (e) {
  32         ex = e;
  33       }
  34       is(ex.toString().includes("Cannot modify"), true, "Expected an error");
  35       is(xulRuntime.foobar, undefined, "Property not defined");
  36     }
  37     test();
  38   ]]></script>
  39
  40   <!-- test results are displayed in the html:body -->
  41   <body xmlns="http://www.w3.org/1999/xhtml">
  42   </body>
  43
  44 </window>