Harness status: OK

Found 8 tests

8 Pass
Pass	window.postMessage should be able to transfer a WritableStream
Pass	a locked WritableStream should not be transferable
Pass	window.postMessage should be able to transfer a {readable, writable} pair
Pass	desiredSize for a newly-transferred stream should be 1
Pass	effective queue size of a transferred writable should be 2
Pass	second write should wait for first underlying write to complete
Pass	abort() should work
Pass	writing a unclonable object should error the stream