1 files changed, 84 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.malformed-operations.worker.js b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.malformed-operations.worker.js
new file mode 100644
index 0000000000..5851fcfbc6
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.malformed-operations.worker.js
@@ -0,0 +1,84 @@
+// 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();