2d.layer.malformed-operations.html

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This test has a WPT meta file that expects 5 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/layers/2d.layer.malformed-operations.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.layer.malformed-operations</title>

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

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

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

<h1>2d.layer.malformed-operations</h1>

<script>

test(t => {

  const canvas = new OffscreenCanvas(200, 200);

  const ctx = canvas.getContext('2d');

  // Shouldn't throw on its own.

  ctx.createPattern(canvas, 'repeat');

  // Make sure the exception isn't caused by calling the function twice.

  ctx.createPattern(canvas, 'repeat');

  // Calling again inside a layer should throw.

  ctx.beginLayer();

  assert_throws_dom("InvalidStateError",

                    () => ctx.createPattern(canvas, 'repeat'));

}, "Throws if createPattern is called while layers are open.");

test(t => {

  const canvas = new OffscreenCanvas(200, 200);

  const ctx = canvas.getContext('2d');

  const canvas2 = new OffscreenCanvas(200, 200);

  const ctx2 = canvas2.getContext('2d');

  // Shouldn't throw on its own.

  ctx2.drawImage(canvas, 0, 0);

  // Make sure the exception isn't caused by calling the function twice.

  ctx2.drawImage(canvas, 0, 0);

  // Calling again inside a layer should throw.

  ctx.beginLayer();

  assert_throws_dom("InvalidStateError",

                    () => ctx2.drawImage(canvas, 0, 0));

}, "Throws if drawImage is called while layers are open.");

test(t => {

  const canvas = new OffscreenCanvas(200, 200);

  const ctx = canvas.getContext('2d');

  // Shouldn't throw on its own.

  ctx.getImageData(0, 0, 200, 200);

  // Make sure the exception isn't caused by calling the function twice.

  ctx.getImageData(0, 0, 200, 200);

  // Calling again inside a layer should throw.

  ctx.beginLayer();

  assert_throws_dom("InvalidStateError",

                    () => ctx.getImageData(0, 0, 200, 200));

}, "Throws if getImageData is called while layers are open.");

test(t => {

  const canvas = new OffscreenCanvas(200, 200);

  const ctx = canvas.getContext('2d');

  const canvas2 = new OffscreenCanvas(200, 200);

  const ctx2 = canvas2.getContext('2d')

  const data = ctx2.getImageData(0, 0, 1, 1);

  // Shouldn't throw on its own.

  ctx.putImageData(data, 0, 0);

  // Make sure the exception isn't caused by calling the function twice.

  ctx.putImageData(data, 0, 0);

  // Calling again inside a layer should throw.

  ctx.beginLayer();

  assert_throws_dom("InvalidStateError",

                    () => ctx.putImageData(data, 0, 0));

}, "Throws if putImageData is called while layers are open.");

test(t => {

  const canvas = new OffscreenCanvas(200, 200);

  const ctx = canvas.getContext('2d');

  // Shouldn't throw on its own.

  canvas.transferToImageBitmap();

  // Make sure the exception isn't caused by calling the function twice.

  canvas.transferToImageBitmap();

  // Calling again inside a layer should throw.

  ctx.beginLayer();

  assert_throws_dom("InvalidStateError",

                    () => canvas.transferToImageBitmap());

}, "Throws if transferToImageBitmap is called while layers are open.");

</script>