require "open3" RSpec.describe "ARGV-check" do it 'given 3, return "1\n2\n3\n"' do workshop = "#{ENV['HOME']}/ruby_learner/workshop" stdout, stderr, status = Open3.capture3("ruby #{workshop}/lib/workplace.rb 3") expect { puts stdout }.to output("1\n2\n3\n").to_stdout end it 'given 5, return "1\n2\n3\n4\n5\n"' do workshop = "#{ENV['HOME']}/ruby_learner/workshop" stdout, stderr, status = Open3.capture3("ruby #{workshop}/lib/workplace.rb 5") expect { puts stdout }.to output("1\n2\n3\n4\n5\n").to_stdout end end