content/canvas/test/test_2d.composite.globalAlpha.invalid.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.composite.globalAlpha.invalid</title>
   3 <script src="/MochiKit/MochiKit.js"></script>
   4 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   5 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   6 <body>
   7 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
   8 <script>
   9
  10 SimpleTest.waitForExplicitFinish();
  11 MochiKit.DOM.addLoadEvent(function () {
  12
  13 var canvas = document.getElementById('c');
  14 var ctx = canvas.getContext('2d');
  15
  16 ctx.globalAlpha = 0.5;
  17 var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
  18 var _thrown = undefined; try {
  19   ctx.globalAlpha = Infinity;
  20 } catch (e) { _thrown = e }; todo(_thrown && _thrown.code == DOMException.NOT_SUPPORTED_ERR, "should throw NOT_SUPPORTED_ERR");
  21 ok(ctx.globalAlpha == a, "ctx.globalAlpha == a");
  22 var _thrown = undefined; try {
  23   ctx.globalAlpha = -Infinity;
  24 } catch (e) { _thrown = e }; todo(_thrown && _thrown.code == DOMException.NOT_SUPPORTED_ERR, "should throw NOT_SUPPORTED_ERR");
  25 ok(ctx.globalAlpha == a, "ctx.globalAlpha == a");
  26 var _thrown = undefined; try {
  27   ctx.globalAlpha = NaN;
  28 } catch (e) { _thrown = e }; todo(_thrown && _thrown.code == DOMException.NOT_SUPPORTED_ERR, "should throw NOT_SUPPORTED_ERR");
  29 ok(ctx.globalAlpha == a, "ctx.globalAlpha == a");
  30
  31 SimpleTest.finish();
  32
  33 });
  34 </script>
  35