ZIO learning - guess number game tests / published by https://github.com/dacr/code-examples-manager #9961b3ce-0e45-4dcb-afa7-a4daea66bceb/b3bacc6e1006cb40680391e0244bf82df6a88ded

zio-learning-13-game-guess-number-testing.sc

// summary : ZIO learning - guess number game tests
// keywords : scala, zio, learning, pure-functional, number-guess, @testable
// 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 : 9961b3ce-0e45-4dcb-afa7-a4daea66bceb
// created-on : 2021-10-30T09:56:36+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala  "3.2.2"
//> using dep "dev.zio::zio:2.0.13"
//> using dep "dev.zio::zio-test:2.0.13"
//> using dep "fr.janalyse::zio-worksheet:2.0.13.0"
// ---------------------
import zio.*, zio.worksheet.*
import zio.test.*
import zio.test.Assertion.*

object GameSpec extends ZIOSpecDefault {

  val guessNumberGameLogic = for { // TODO - encapsulated as work around for some threading issue when defined globally
    _             <- Console.printLine("Let's play a guess number game")
    limit         <- System.envOrElse("GAME_LIMIT", "5").mapAttempt(_.toInt)
    numberToGuess <- Random.nextIntBounded(limit)
    _             <- Console.printLine(s"Your choice( 0<=?<$limit) :")
    givenNumber   <- Console.readLine.mapAttempt(_.toInt)
    result         = if (numberToGuess == givenNumber) "YOU WIN" else "YOU LOOSE"
    _             <- Console.printLine(result)
    _             <- Console.printLine("Play again (yes/no) ? ")
    playAgain     <- Console.readLine.map(_.trim.toLowerCase)
  } yield "no" != playAgain

  override def spec = suite("guess number tests") {
    test("basic game play behavior") {
      for {
        _         <- TestSystem.putEnv("GAME_LIMIT", "50")
        _         <- TestRandom.feedInts(42)
        _         <- TestConsole.feedLines("42", "no")
        playAgain <- guessNumberGameLogic
        output    <- TestConsole.output
      } yield assertTrue(output.map(_.trim).contains("YOU WIN"))
    }
  }
}

GameSpec.main(Array.empty)