ZIO learning - clock / published by https://github.com/dacr/code-examples-manager #64edef51-38e9-492e-88f6-b00b5336ad55/ea44b8db59cf18dbbf9a853e14315369a27d9b46

zio-learning-11-clock.sc

// summary : ZIO learning - clock
// keywords : scala, zio, learning, pure-functional
// publish : gist
// authors : David Crosson
// license : Apache NON-AI License Version 2.0 (https://raw.githubusercontent.com/non-ai-licenses/non-ai-licenses/main/NON-AI-APACHE2)
// id : 64edef51-38e9-492e-88f6-b00b5336ad55
// created-on : 2021-04-02T16:22:22+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.4.2"
//> using dep "dev.zio::zio:2.0.13"
//> using dep "fr.janalyse::zio-worksheet:2.0.13.0"
// ---------------------

import zio.*, zio.worksheet.*, zio.Duration.*

val alarmLogic = for {
  _        <- Console.printLine("how many seconds to wait for ?")
  duration <- Console.readLine.mapAttempt(_.toInt)
  _        <- Clock.sleep(duration.seconds)
  _        <- Console.printLine("Wake up !")
} yield ()

/*
   So as alarmLogic is an effect, it is very very easy to test
   although a clock is being used, see the next example
 */

// -------------------------------------------------------------
alarmLogic.unsafeRun