| Test OffscreenCanvas transferable with exception cases. |
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| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". |
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| PASS ctx = offscreenCanvas1.getContext('2d') did not throw exception. |
| PASS ctx is an instance of OffscreenCanvasRenderingContext2D |
| PASS worker.postMessage({data: offscreenCanvas1}, [offscreenCanvas1]) threw exception DataCloneError: Failed to execute 'postMessage' on 'Worker': An OffscreenCanvas with a context could not be cloned.. |
| PASS offscreenCanvas2.transferToImageBitmap() threw exception InvalidStateError: Failed to execute 'transferToImageBitmap' on 'OffscreenCanvas': Cannot transfer an ImageBitmap from a detached OffscreenCanvas. |
| PASS worker.postMessage({data: offscreenCanvas2}, [offscreenCanvas2]) threw exception DataCloneError: Failed to execute 'postMessage' on 'Worker': An OffscreenCanvas is detached and could not be cloned.. |
| PASS offscreenCanvas2.getContext('2d') threw exception InvalidStateError: Failed to execute 'getContext' on 'OffscreenCanvas': OffscreenCanvas object is detached. |
| PASS successfullyParsed is true |
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| TEST COMPLETE |
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