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<!DOCTYPE HTML>
<title>Canvas test: toBlob</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<body>
<canvas id="c" width="100" height="0"></canvas>
<script>

function testblob(blob) {
  is(blob, null, "Null blob expected");
}

function test1(canvas)
{
  canvas.toBlob(function(blob) {
    testblob(blob);
    test2(canvas);
  }, "image/png");
}

function test2(canvas)
{
  canvas.width = 0;
  canvas.height = 100;
  canvas.toBlob(function(blob) {
    testblob(blob);
    SimpleTest.finish();
  }, "image/png");
}

SimpleTest.waitForExplicitFinish();

addLoadEvent(function () {

var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
test1(canvas);

});
</script>