module Cucumber::Constantize

def constantize(camel_cased_word)
  try = 0
  begin
    try += 1
    names = camel_cased_word.split('::')
    names.shift if names.empty? || names.first.empty?
    constant = ::Object
    names.each do |name|
      constant = constantize_name(constant, name)
    end
    constant
  rescue NameError => e
    require underscore(camel_cased_word)
    retry if try < 2
    raise e
  end
end

def constantize_name(constant, name)
  if constant.const_defined?(name, false)
    constant.const_get(name, false)
  else
    constant.const_missing(name)
  end
end

def underscore(camel_cased_word)
  camel_cased_word.to_s.gsub(/::/, '/')
                  .gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
                  .gsub(/([a-z\d])([A-Z])/, '\1_\2')
                  .tr('-', '_')
                  .downcase
end