2d.canvas.context.type.prototype.html

mozilla-central/testing/web-platform/tests/html/canvas/offscreen/canvas-context/2d.canvas.context.type.prototype.html

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Test Info:

This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/canvas-context/2d.canvas.context.type.prototype.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.canvas.context.type.prototype</title>

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

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

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

<h1>2d.canvas.context.type.prototype</h1>

<p class="desc">window.CanvasRenderingContext2D.prototype are not [[Writable]] and not [[Configurable]], and its methods are [[Configurable]].</p>

<p class="notes">Defined in "Web IDL" (draft)

<script>

var t = async_test("window.CanvasRenderingContext2D.prototype are not [[Writable]] and not [[Configurable]], and its methods are [[Configurable]].");

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');

  _assert(window.OffscreenCanvasRenderingContext2D.prototype, "window.OffscreenCanvasRenderingContext2D.prototype");

  _assert(window.OffscreenCanvasRenderingContext2D.prototype.fill, "window.OffscreenCanvasRenderingContext2D.prototype.fill");

  window.OffscreenCanvasRenderingContext2D.prototype = null;

  _assert(window.OffscreenCanvasRenderingContext2D.prototype, "window.OffscreenCanvasRenderingContext2D.prototype");

  delete window.OffscreenCanvasRenderingContext2D.prototype;

  _assert(window.OffscreenCanvasRenderingContext2D.prototype, "window.OffscreenCanvasRenderingContext2D.prototype");

  window.OffscreenCanvasRenderingContext2D.prototype.fill = 1;

  _assertSame(window.OffscreenCanvasRenderingContext2D.prototype.fill, 1, "window.OffscreenCanvasRenderingContext2D.prototype.fill", "1");

  delete window.OffscreenCanvasRenderingContext2D.prototype.fill;

  _assertSame(window.OffscreenCanvasRenderingContext2D.prototype.fill, undefined, "window.OffscreenCanvasRenderingContext2D.prototype.fill", "undefined");

  t.done();

});

</script>