autograder example

def parse_stats
  regex = /(\d+)\s+examples?,\s+(\d+)\s+failures?(,\s+(\d+)\s+pending)?$/
  if @output =~ regex
    @total, @failed, @pending = $1.to_i, $2.to_i, $4.to_i
    @passed = @total - @failed - @pending
  else
    @output << "\nCan't parse output: #{@output_stream}"
  end
end