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<!DOCTYPE HTML>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<body>
<script>
SpecialPowers.pushPrefEnv({ 'set': [['canvas.filters.enabled', true]] }, function () {
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
is(ctx.filter, 'none', 'filter should intialy be set to \'none\'');
ctx.filter = 'blur(5px)';
is(ctx.filter, 'blur(5px)', 'valid filter should round-trip');
ctx.save();
ctx.filter = 'none';
is(ctx.filter, 'none', 'none should unset the filter');
ctx.restore();
is(ctx.filter, 'blur(5px)', 'filter should be part of the state');
ctx.filter = 'blur(10)';
is(ctx.filter, 'blur(5px)', 'invalid filter should be ignored');
ctx.filter = 'blur 10px';
is(ctx.filter, 'blur(5px)', 'syntax error should be ignored');
ctx.filter = 'inherit';
is(ctx.filter, 'blur(5px)', 'inherit should be ignored');
ctx.filter = 'initial';
is(ctx.filter, 'blur(5px)', 'initial should be ignored');
ctx.filter = '';
is(ctx.filter, 'blur(5px)', 'empty string should be ignored and not unset the filter');
ctx.filter = null;
is(ctx.filter, 'blur(5px)', 'null should be ignored and not unset the filter');
ctx.filter = undefined;
is(ctx.filter, 'blur(5px)', 'undefined should be ignored and not unset the filter');
SimpleTest.finish();
});
SimpleTest.waitForExplicitFinish();
</script>
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