Integration tests (including Webrat) using multiple checkboxes and file attachments will fail (in Rails 2.3.2). This fixes them.

hotfixes.rb

Dir["#{Rails.root}/lib/hotfixes/*.rb"].each do |hotfix|
  load hotfix
end

multipart_requestify.rb

if Rails.env == "test"
  require "action_controller/integration"

  class ActionController::Integration::Session
  private
    def multipart_requestify(params, first=true)
      params.inject([]) do |collection, (key, value)|
        k = first ? CGI.escape(key.to_s) : "[#{CGI.escape(key.to_s)}]"
        case value
        when Hash
          multipart_requestify(value, false).each do |subkey, subvalue|
            collection << [k + subkey, subvalue]
          end
        when Array
          value.each do |subvalue|
            collection << [k + "[]", subvalue]
          end
        else
          collection << [k, value]
        end
        collection
      end
    end
  end
end