js/xpconnect/tests/mochitest/test_bug793969.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <!--
   4 https://bugzilla.mozilla.org/show_bug.cgi?id=793969
   5 -->
   6 <head>
   7   <meta charset="utf-8">
   8   <title>Test for Bug 793969</title>
   9   <script src="/tests/SimpleTest/SimpleTest.js"></script>
  10   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  11 </head>
  12 <body>
  13 <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=793969">Mozilla Bug 793969</a>
  14 <p id="display"></p>
  15 <div id="content" style="display: none">
  16
  17 </div>
  18 <pre id="test">
  19 <script type="application/javascript">
  20
  21 /** Test for Bug 793969 **/
  22 function checkThrows(f, desc, skipMessageCheck) {
  23   try {
  24     f();
  25     ok(false, "Should have thrown for " + desc);
  26   } catch (e) {
  27     ok(true, "threw correctly");
  28     if (!skipMessageCheck)
  29       ok(/denied/.exec(e) ||
  30          /can't redefine non-configurable property/.exec(e),
  31          "Correctly threw a security exception: " + e);
  32   }
  33 }
  34
  35 // NB: These sets will be no-ops (throw in strict mode) because setting an inherited readonly value prop has those semantics.
  36 checkThrows(function() { "use strict"; location.valueOf = 'hah'; }, 'Shadow with string', /* skipMessageCheck = */ true);
  37 checkThrows(function() { "use strict"; location.valueOf = function() { return {a: 'hah'};} }, 'Shadow with function', /* skipMessageCheck = */ true);
  38 checkThrows(function() { Object.defineProperty(location, 'valueOf', { value: function() { return 'hah'; } }); }, 'defineProperty with value');
  39 checkThrows(function() { delete location.valueOf; Object.defineProperty(location, 'valueOf', { value: function() { return 'hah'; } }); }, 'delete + defineProperty with value');
  40 checkThrows(function() { Object.defineProperty(location, 'valueOf', { get: function() { return 'hah'; } }); }, 'defineProperty with getter');
  41 checkThrows(function() { delete location.valueOf; Object.defineProperty(location, 'valueOf', { get: function() { return 'hah'; } }); }, 'delete + defineProperty with getter');
  42
  43 Object.prototype.valueOf = function() { return 'hah'; };
  44 is(({}).valueOf(), 'hah', "Shadowing on Object.prototype works for vanilla objects");
  45 is(location.valueOf(), location, "Shadowing on Object.prototype and Location.prototype doesn't for location objects");
  46
  47 location[Symbol.toPrimitive] = function() { return 'hah'; }
  48 is(location + "", location.toString(), "Should't be able to shadow with toPrimitive");
  49
  50 </script>
  51 </pre>
  52 </body>
  53 </html>