content/canvas/test/test_type.prototype.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: type.prototype</title>
   3 <!-- Testing: window.HTMLCanvasElement has prototype, which is { ReadOnly, DontDelete }. prototype has getContext, which is not -->
   4 <script src="/MochiKit/MochiKit.js"></script>
   5 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   6 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   7 <body>
   8 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
   9 <script>
  10
  11 SimpleTest.waitForExplicitFinish();
  12 MochiKit.DOM.addLoadEvent(function () {
  13
  14 var canvas = document.getElementById('c');
  15 var ctx = canvas.getContext('2d');
  16
  17 ok(window.HTMLCanvasElement.prototype, "window.HTMLCanvasElement.prototype");
  18 ok(window.HTMLCanvasElement.prototype.getContext, "window.HTMLCanvasElement.prototype.getContext");
  19 window.HTMLCanvasElement.prototype = null;
  20 ok(window.HTMLCanvasElement.prototype, "window.HTMLCanvasElement.prototype");
  21 delete window.HTMLCanvasElement.prototype;
  22 ok(window.HTMLCanvasElement.prototype, "window.HTMLCanvasElement.prototype");
  23 window.HTMLCanvasElement.prototype.getContext = 1;
  24 ok(window.HTMLCanvasElement.prototype.getContext === 1, "window.HTMLCanvasElement.prototype.getContext === 1");
  25 delete window.HTMLCanvasElement.prototype.getContext;
  26 todo(window.HTMLCanvasElement.prototype.getContext === undefined, "window.HTMLCanvasElement.prototype.getContext === undefined");
  27
  28 SimpleTest.finish();
  29
  30 });
  31 </script>
  32