module ExecJS
  # Encodes strings as UTF-8
  module Encoding
    if RUBY_ENGINE == 'jruby' || RUBY_ENGINE == 'rbx'
      # workaround for jruby bug http://jira.codehaus.org/browse/JRUBY-6588
      # workaround for rbx bug https://github.com/rubinius/rubinius/issues/1729
      def encode(string)
        if string.encoding.name == 'ASCII-8BIT'
          data = string.dup
          data.force_encoding('UTF-8')

          unless data.valid_encoding?
            raise ::Encoding::UndefinedConversionError, "Could not encode ASCII-8BIT data #{string.dump} as UTF-8"
          end
        else
          data = string.encode('UTF-8')
        end
        data
      end
    else
      def encode(string)
        string.encode('UTF-8')
      end
    end
  end
end