1require_relative "roman"
2
3{ 1 => "I", 4 => "IV", 9 => "IX", 40 => "XL", 90 => "XC", 2024 => "MMXXIV" }.each do |number, want|
4  got = to_roman(number)
5  raise "to_roman(#{number}) = #{got.inspect}, want #{want.inspect}" unless got == want
6end
7
8puts "ok"