2d.gradient.object.invalidoffset.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.invalidoffset.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

<meta charset="UTF-8">

<title>OffscreenCanvas test: 2d.gradient.object.invalidoffset</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.invalidoffset</h1>

<p class="desc"></p>

<script>

var t = async_test("");

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');

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

  assert_throws_dom("INDEX_SIZE_ERR", function() { g.addColorStop(-1, '#000'); });

  assert_throws_dom("INDEX_SIZE_ERR", function() { g.addColorStop(2, '#000'); });

  assert_throws_js(TypeError, function() { g.addColorStop(Infinity, '#000'); });

  assert_throws_js(TypeError, function() { g.addColorStop(-Infinity, '#000'); });

  assert_throws_js(TypeError, function() { g.addColorStop(NaN, '#000'); });

  t.done();

});

</script>