fails:IO.copy_stream from an IO raises an IOError if the source IO is not open for reading
fails:IO.copy_stream from an IO does not close the source IO
fails:IO.copy_stream from an IO does not change the IO offset when an offset is specified
fails:IO.copy_stream from an IO does change the IO offset when an offset is not specified
fails:IO.copy_stream from an IO to a file name copies the entire IO contents to the file
fails:IO.copy_stream from an IO to a file name returns the number of bytes copied
fails:IO.copy_stream from an IO to a file name copies only length bytes when specified
fails:IO.copy_stream from an IO to a file name copies only length bytes from the offset
fails:IO.copy_stream from an IO to a file name calls #to_path to convert on object to a file name
fails:IO.copy_stream from an IO to a file name raises a TypeError if #to_path does not return a String
fails:IO.copy_stream from an IO to an IO copies the entire IO contents to the IO
fails:IO.copy_stream from an IO to an IO returns the number of bytes copied
fails:IO.copy_stream from an IO to an IO starts writing at the destination IO's current position
fails:IO.copy_stream from an IO to an IO leaves the destination IO position at the last write
fails:IO.copy_stream from an IO to an IO raises an IOError if the destination IO is not open for writing
fails:IO.copy_stream from an IO to an IO does not close the destination IO
fails:IO.copy_stream from an IO to an IO copies only length bytes when specified
fails:IO.copy_stream from an IO to an IO copies only length bytes from the offset
fails:IO.copy_stream from a file name calls #to_path to convert on object to a file name
fails:IO.copy_stream from a file name raises a TypeError if #to_path does not return a String
fails:IO.copy_stream from a file name to a file name copies only length bytes when specified
fails:IO.copy_stream from a file name to a file name copies only length bytes from the offset
fails:IO.copy_stream from a file name to a file name calls #to_path to convert on object to a file name
fails:IO.copy_stream from a file name to a file name raises a TypeError if #to_path does not return a String
fails:IO.copy_stream from a file name to an IO copies the entire IO contents to the IO
fails:IO.copy_stream from a file name to an IO returns the number of bytes copied
fails:IO.copy_stream from a file name to an IO starts writing at the destination IO's current position
fails:IO.copy_stream from a file name to an IO leaves the destination IO position at the last write
fails:IO.copy_stream from a file name to an IO raises an IOError if the destination IO is not open for writing
fails:IO.copy_stream from a file name to an IO does not close the destination IO
fails:IO.copy_stream from a file name to an IO copies only length bytes when specified
fails:IO.copy_stream from a file name to an IO copies only length bytes from the offset
