[writable-stream.html]
  [window.postMessage should be able to transfer a WritableStream]
    expected: FAIL

  [second write should wait for first underlying write to complete]
    expected: FAIL

  [abort() should work]
    expected: FAIL

  [window.postMessage should be able to transfer a {readable, writable} pair]
    expected: FAIL

  [writing a unclonable object should error the stream]
    expected: FAIL

  [effective queue size of a transferred writable should be 2]
    expected: FAIL

  [desiredSize for a newly-transferred stream should be 1]
    expected: FAIL

  [a locked WritableStream should not be transferable]
    expected: FAIL

