cucumber-ruby/lib/cucumber/constantize.rb

# frozen_string_literal: true

require 'cucumber/platform'
module Cucumber
  module Constantize # :nodoc:
    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

    # Snagged from active_support
    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

    private

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