6 Ways to Run Shell Commands in Ruby

http://tech.natemurray.com/2007/03/ruby-shell-commands.html http://stackoverflow.com/a/2400 http://stackoverflow.com/a/37329716 -> decision flowchart

directorylist = %x[find . -name '*test.rb' | sort]

Which, in this case, will populate file list with all test files under the current directory, which you can process as expected:

directorylist.each do |filename|
  filename.chomp!
  # work with file
end