deep case/data class changes / published by https://github.com/dacr/code-examples-manager #c198c8b6-672a-4a5a-8554-4f234ac665c2/66a0a79ce92cfec2740991e36bc74718b885de6f

data-updates-using-quick-lens.sc

// summary : deep case/data class changes
// keywords : scala, lens, changes, pure-functional, @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 : c198c8b6-672a-4a5a-8554-4f234ac665c2
// created-on : 2022-05-18T18:32:33+02:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.6.4"
//> using dep "com.softwaremill.quicklens::quicklens:1.9.12"
//> using dep "dev.zio::zio-test:2.1.16"
// ---------------------

import zio.*
import zio.test.*
import zio.test.TestAspect.*
import com.softwaremill.quicklens.*
import zio.test.TestAspect.*
import java.time.*

// ----------------------------------------------------------------
object QuickLensTest extends ZIOSpecDefault {

  case class Editor(name: String)
  case class Owner(firstName: String, lastName: String, birthYear: Int)
  case class ComicAuthor(name: String, birthYear: Int)
  case class ComicBook(title: String, volume: Int, editor: Editor, publishedDate: LocalDate, author: ComicAuthor)
  case class ComicSeries(name: String, comics: List[ComicBook])
  case class ComicCollection(owner: Owner, series: List[ComicSeries])

  val dargaud = Editor("dargaud")
  val leo     = ComicAuthor("leo", 1944)

  val aldebaran1 = ComicBook("la catastrophe", 1, dargaud, LocalDate.parse("1994-01-01"), leo)
  val aldebaran2 = ComicBook("la blonde", 2, dargaud, LocalDate.parse("1995-01-01"), leo)
  val aldebaran3 = ComicBook("la photo", 3, dargaud, LocalDate.parse("1996-01-01"), leo)
  val aldebaran4 = ComicBook("le groupe", 4, dargaud, LocalDate.parse("1997-01-01"), leo)
  val aldebaran5 = ComicBook("la créature", 5, dargaud, LocalDate.parse("1998-01-01"), leo)
  val aldebaran  = ComicSeries("aldebaran", List(aldebaran1, aldebaran2, aldebaran3, aldebaran4, aldebaran5))

  val kenya1 = ComicBook("apparitions", 1, dargaud, LocalDate.parse("2001-10-01"), leo)
  val kenya2 = ComicBook("rencontres", 2, dargaud, LocalDate.parse("2003-01-01"), leo)
  val kenya3 = ComicBook("aberrations", 3, dargaud, LocalDate.parse("2004-06-01"), leo)
  val kenya4 = ComicBook("interventions", 4, dargaud, LocalDate.parse("2006-01-01"), leo)
  val kenya5 = ComicBook("illusions", 5, dargaud, LocalDate.parse("2008-06-01"), leo)

  val joe           = Owner("john", "doe", 1942)
  val joeCollection = ComicCollection(joe, List(aldebaran))

  override def spec = suite("quick lens tests")(
    test("basic usages") {
      val updatedCollection =
        joeCollection
          .modify(_.owner.lastName)
          .using(_.toUpperCase)
          .modify(_.series.each.comics.each.title)
          .using(_.capitalize)
      assertTrue(
        updatedCollection.owner.lastName.forall(_.isUpper),
        updatedCollection.series.flatMap(_.comics).forall(_.title.head.isUpper)
      )
    }
  )
}

QuickLensTest.main(Array.empty)