dom/base/test/test_window_proto.html

   1 <!DOCTYPE html>
   2 <meta charset=utf-8>
   3 <title>Test for ...</title>
   4 <script src="/resources/testharness.js"></script>
   5 <script src="/resources/testharnessreport.js"></script>
   6 <div id="log"></div>
   7 <script>
   8 test(function() {
   9   assert_throws(new TypeError, function() {
  10     Object.setPrototypeOf(window, Object.create(window));
  11   }, "Setting prototype via setPrototypeOf");
  12
  13   assert_throws(new TypeError, function() {
  14     window.__proto__ = Object.create(window);
  15   }, "Setting prototype via __proto__");
  16 }, "Setting the prototype of a window to something that has the window on its proto chain should throw");
  17 </script>