2d.imageData.create2.negative.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/pixel-manipulation/2d.imageData.create2.negative.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.imageData.create2.negative</title>

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

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

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

<h1>2d.imageData.create2.negative</h1>

<p class="desc">createImageData(sw, sh) takes the absolute magnitude of the size arguments</p>

<script>

var t = async_test("createImageData(sw, sh) takes the absolute magnitude of the size arguments");

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 imgdata1 = ctx.createImageData(10, 20);

  var imgdata2 = ctx.createImageData(-10, 20);

  var imgdata3 = ctx.createImageData(10, -20);

  var imgdata4 = ctx.createImageData(-10, -20);

  _assertSame(imgdata1.data.length, imgdata2.data.length, "imgdata1.data.length", "imgdata2.data.length");

  _assertSame(imgdata2.data.length, imgdata3.data.length, "imgdata2.data.length", "imgdata3.data.length");

  _assertSame(imgdata3.data.length, imgdata4.data.length, "imgdata3.data.length", "imgdata4.data.length");

  t.done();

});

</script>