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

<h1>2d.gradient.object.invalidcolour</h1>
<p class="desc"></p>


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

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

var g = ctx.createLinearGradient(0, 0, 100, 0);
assert_throws("SYNTAX_ERR", function() { g.addColorStop(0, ""); });
assert_throws("SYNTAX_ERR", function() { g.addColorStop(0, 'null'); });
assert_throws("SYNTAX_ERR", function() { g.addColorStop(0, 'undefined'); });
assert_throws("SYNTAX_ERR", function() { g.addColorStop(0, null); });
assert_throws("SYNTAX_ERR", function() { g.addColorStop(0, undefined); });

t.done();

});
</script>