Content - f422cfea233bf6c27a77214a26ce8971b82de91f - 63b2314/offscreen-canvas/compositing/2d.composite.globalAlpha.invalid.html

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Tip revision: 1503470039390008dc011a55ce82f41aa52fa8aa authored by Mikhail Pozdnyakov on 16 March 2018, 12:55:10 UTC
[Sensor] Add feature detection

Tip revision: 1503470

2d.composite.globalAlpha.invalid.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.composite.globalAlpha.invalid</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/canvas-tests.js"></script>

<h1>2d.composite.globalAlpha.invalid</h1>
<p class="desc"></p>


<script>
var t = async_test("");
t.step(function() {

var offscreenCanvas = new OffscreenCanvas(100, 50);
var ctx = offscreenCanvas.getContext('2d');

ctx.globalAlpha = 0.5;
var a = ctx.globalAlpha; // might not be exactly 0.5, if it is rounded/quantised, so remember for future comparisons
ctx.globalAlpha = Infinity;
_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
ctx.globalAlpha = -Infinity;
_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");
ctx.globalAlpha = NaN;
_assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a");

t.done();

});
</script>

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