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Test Info: Warnings
- 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.worker.html - WPT Dashboard Interop Dashboard
// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
// OffscreenCanvas test in a worker:2d.layer.malformed-operations
// Description:
// Note:
importScripts("/resources/testharness.js");
importScripts("/html/canvas/resources/canvas-tests.js");
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.");
done();