on_the_fly_class_step_definition.rb

require 'uri'
require File.expand_path(File.join(File.dirname(__FILE__), "..", "support", "paths"))

Given(/^a service implementation "([^\"]*)" exists with attributes "([^\"]*)" and first display variable named "([^\"]*)" and second display variable named "([^\"]*)"$/) do |class_name, attributes_string, first_display_var, second_display_var|
  begin
    klass = Object.const_get(class_name)
  rescue NameError
    klass = Object.const_set(class_name, Class.new(ServiceImplementation))
  
    aux_variables = attributes_string.split(',').map { |x| x.strip.to_s }
    klass.class_eval do
      @aux_variables = aux_variables
      @first_display_var_name = first_display_var
      @second_display_var_name = second_display_var
    end
  end
end