Perhaps because this project actually is using the Pluggable Annotation Processing API (e.g. https://github.com/immutables/immutables/blob/master/generat...).

Yep, that's fair. I took another look, Lombok is only unsupported because it inserts methods into pre-existing classes; I misremembered the limitation on the pluggable annotations. My bad!

Ruby has a PTY module [1] with an expect method [2] that supports scripting similar to expect. Examples here: http://www.42klines.com/2010/08/14/what-to-expect-from-the-r... .

1. http://ruby-doc.org/stdlib-2.2.2/libdoc/pty/rdoc/PTY.html 2. http://ruby-doc.org/stdlib-2.1.0/libdoc/pty/rdoc/IO.html