dom/canvas/test/test_toBlob_zero_dimension.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: toBlob</title>
   3 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   4 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   5 <body>
   6 <canvas id="c" width="100" height="0"></canvas>
   7 <script>
   8
   9 function testblob(blob) {
  10   is(blob, null, "Null blob expected");
  11 }
  12
  13 function test1(canvas)
  14 {
  15   canvas.toBlob(function(blob) {
  16     testblob(blob);
  17     test2(canvas);
  18   }, "image/png");
  19 }
  20
  21 function test2(canvas)
  22 {
  23   canvas.width = 0;
  24   canvas.height = 100;
  25   canvas.toBlob(function(blob) {
  26     testblob(blob);
  27     SimpleTest.finish();
  28   }, "image/png");
  29 }
  30
  31 SimpleTest.waitForExplicitFinish();
  32
  33 addLoadEvent(function () {
  34
  35 var canvas = document.getElementById('c');
  36 var ctx = canvas.getContext('2d');
  37 test1(canvas);
  38
  39 });
  40 </script>