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Test Info:

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<meta charset="UTF-8">
<title>OffscreenCanvas test: 2d.canvas.context.type.extend</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<h1>2d.canvas.context.type.extend</h1>
<p class="desc">Interface methods can be added</p>
<p class="notes">Defined in "Web IDL" (draft)
<script>
var t = async_test("Interface methods can be added");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
throw reason;
});
t.step(function() {
var canvas = new OffscreenCanvas(100, 50);
var ctx = canvas.getContext('2d');
window.OffscreenCanvasRenderingContext2D.prototype.fillRectGreen = function (x, y, w, h)
{
this.fillStyle = '#0f0';
this.fillRect(x, y, w, h);
};
ctx.fillStyle = '#f00';
ctx.fillRectGreen(0, 0, 100, 50);
_assertPixel(canvas, 50,25, 0,255,0,255);
t.done();
});
</script>