
FAIL Piping through a duck-typed pass-through transform stream should work Can't find variable: WritableStream
FAIL Piping through a transform errored on the writable end does not cause an unhandled promise rejection Can't find variable: WritableStream
PASS pipeThrough generically calls pipeTo with the appropriate args 
FAIL pipeThrough can handle calling a pipeTo that returns a non-promise object Can't find variable: WritableStream
FAIL pipeThrough can handle calling a pipeTo that returns a non-promise thenable object Can't find variable: WritableStream
FAIL pipeThrough should mark a real promise from a fake readable as handled Can't find variable: WritableStream
FAIL pipeThrough should not be fooled by an object whose instanceof Promise returns true Can't find variable: WritableStream
PASS undefined readable or writable arguments should cause pipeThrough to throw 
FAIL invalid but not undefined arguments should not cause pipeThrough to throw Can't find variable: WritableStream
PASS pipeThrough should throw when its first argument is not convertible to an object 
PASS pipeThrough should throw when "this" has no pipeTo method 
PASS pipeThrough should rethrow errors from accessing pipeTo, readable, or writable 
PASS pipeThrough should work with no options argument