rake run lastest_file

Rakefile

require_relative "./ex_tool/lib/tool"

task :default => [:test]

task :test do
  sh "bundle exec ruby ./ex/watir.rb"
end

task :la do
  #ARGV[1] represents argument which you input.
  sh "ruby ./#{Tool.new.get_lastest} #{ARGV[1]}"
end

task :app do
  sh "bundle exec ./app.rb"
end