hello-algo/en/codes/ruby/test_all.rb

require 'open3'

start_time = Time.now
ruby_code_dir = File.dirname(__FILE__)
files = Dir.glob("#{ruby_code_dir}/chapter_*/*.rb")

errors = []

files.each do |file|
  stdout, stderr, status = Open3.capture3("ruby #{file}")
  errors << stderr unless status.success?
end

puts "\x1b[34mTested #{files.count} files\x1b[m"

unless errors.empty?
  puts "\x1b[33mFound exception in #{errors.length} files\x1b[m"
  raise errors.join("\n\n")
else
  puts "\x1b[32mPASS\x1b[m"
end

puts "Testing finishes after #{((Time.now - start_time) * 1000).round} ms"