Scala example source code file (ProductTest.scala)

This example Scala source code file (ProductTest.scala) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Scala by Example" ^TM.

Learn more about this Scala project at its project page.

Java - Scala tags/keywords

either, list, oneandoption, oneandoptionpair, option, optionlist, producttest, speclite

The ProductTest.scala Scala example source code

package scalaz

import std.AllInstances._
import scalaz.scalacheck.ScalazProperties._
import scalaz.scalacheck.ScalazArbitrary._

object ProductTest extends SpecLite {
  type OptionList[α] = (Option[α], List[α])
  type OneAndOption[α] = OneAnd[Option, α]
  type OneAndOptionPair[α] = (OneAndOption[α], OneAndOption[α])

  implicit val optionListMonadPlus = MonadPlus[Option].product[List]
  implicit val optionListZip = Zip[Option].product[List]
  implicit val oneAndOptionPairTraverse1 = Traverse1[OneAndOption].product[OneAndOption]

  {
    implicit val optionListBindRec = BindRec[Option].product[List]
    checkAll(bindRec.laws[OptionList])
  }

  checkAll(monadPlus.strongLaws[OptionList])
  checkAll(zip.laws[OptionList])
  checkAll(traverse1.laws[OneAndOptionPair])

  implicit val eitherTuple2 = Bitraverse[Either].product[Tuple2]
  checkAll(bitraverse.laws[λ[(α, β) => (Either[α, β], (α, β))]])
}