mozilla-release/testing/web-platform/tests/offscreen-canvas/path-objects/2d.path.arcTo.zero.2.html

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

<h1>2d.path.arcTo.zero.2</h1>
<p class="desc">arcTo() with zero radius draws a straight line from P0 to P1, even when all points are collinear</p>


<script>
var t = async_test("arcTo() with zero radius draws a straight line from P0 to P1, even when all points are collinear");
t.step(function() {

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

ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 100, 50);
ctx.lineWidth = 50;
ctx.strokeStyle = '#0f0';
ctx.beginPath();
ctx.moveTo(0, 25);
ctx.arcTo(100, 25, -100, 25, 0);
ctx.stroke();
ctx.strokeStyle = '#f00';
ctx.beginPath();
ctx.moveTo(100, 25);
ctx.arcTo(200, 25, 50, 25, 0);
ctx.stroke();
_assertPixel(offscreenCanvas, 50,25, 0,255,0,255, "50,25", "0,255,0,255");

t.done();

});
</script>