module Redis::Commands::Connection

def auth(*args)
  send_command([:auth, *args])
end

def echo(value)
  send_command([:echo, value])
end

def ping(message = nil)
  send_command([:ping, message].compact)
end

def quit
  synchronize do |client|
    client.call_v([:quit])
  rescue ConnectionError
  ensure
    client.close
  end
end

def select(db)
  send_command([:select, db])
end