2d.gradient.object.return.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.object.return.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->

<title>OffscreenCanvas test: 2d.gradient.object.return</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/html/canvas/resources/canvas-tests.js"></script>

<h1>2d.gradient.object.return</h1>

<p class="desc">createLinearGradient() and createRadialGradient() returns objects implementing CanvasGradient</p>

<script>

var t = async_test("createLinearGradient() and createRadialGradient() returns objects implementing CanvasGradient");

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.CanvasGradient.prototype.thisImplementsCanvasGradient = true;

  var g1 = ctx.createLinearGradient(0, 0, 100, 0);

  _assertDifferent(g1.addColorStop, undefined, "g1.addColorStop", "undefined");

  _assertSame(g1.thisImplementsCanvasGradient, true, "g1.thisImplementsCanvasGradient", "true");

  var g2 = ctx.createRadialGradient(0, 0, 10, 0, 0, 20);

  _assertDifferent(g2.addColorStop, undefined, "g2.addColorStop", "undefined");

  _assertSame(g2.thisImplementsCanvasGradient, true, "g2.thisImplementsCanvasGradient", "true");

  t.done();

});

</script>