Cucumber 关于路径的definition

I go to the edit movie page for "Alien"
主要为了能够通用

When /^(?:|I )go to (.+)$/ do |page_name|
  visit path_to(page_name)
end

  def path_to(page_name)
    case page_name

    when /^the home\s?page$/
      '/'
    when /^the (.*)\s?page for (.*)\s?$/
      page_name.scan /^the (.*)\s?page for "(.*)"$/
      path_components = $1.split(/\s+/)
      page_name =~ /^the (.*)\s?page for "(.*)"$/
      params = $2  
      debugger
      self.send(path_components.push('path').join('_').to_sym, Movie.find_by_title(params))

    # Add more mappings here.
    # Here is an example that pulls values out of the Regexp:
    #
    #   when /^(.*)'s profile page$/i
    #     user_profile_path(User.find_by_login($1))

    else
      begin
        page_name =~ /^the (.*) page/
        path_components = $1.split(/\s+/)
        self.send(path_components.push('path').join('_').to_sym)
      rescue NoMethodError, ArgumentError
        raise "Can't find mapping from \"#{page_name}\" to a path.\n" +
          "Now, go and add a mapping in #{__FILE__}"
      end
    end
  end