enhance test

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
enhance test

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>
fix: Add -DRUBY_EXPORT to preprocess ruby sources

Signed-off-by: Akira Hayakawa <ruby.wktk@gmail.com>