def write_summary(duration, total, failures, pending)
      _write do |f|
        f.puts _message(total, failures, pending, duration)
        f.puts _failed_paths.join("\n") if failures > 0
      end
    end
def write_summary(duration, total, failures, pending)
      _write do |f|
        f.puts _message(total, failures, pending, duration)
        f.puts _failed_paths.join("\n") if failures > 0
      end
    end
Write summary to temporary file for runner