Scala example source code file (OneOrTest.scala)

This example Scala source code file (OneOrTest.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

applicative, apply, cobind, comonad, foldable, foldable1, functor, int, list, nel, oneor, oneortest, speclite, traverse1

The OneOrTest.scala Scala example source code

package scalaz

import org.scalacheck.Prop._

import scalaz.scalacheck.ScalazProperties._
import scalaz.scalacheck.ScalazArbitrary._
import std.AllInstances._
import org.scalacheck.Prop.forAll

object OneOrTest extends SpecLite {
  import OneOr._
  checkAll("OneOr", equal.laws[OneOr[List, Int]])
  checkAll("OneOr", order.laws[OneOr[List, Int]])
  checkAll("OneOr List", traverse.laws[OneOrList])
  checkAll("OneOr List", applicative.laws[OneOrList])
  checkAll("OneOr Nel", traverse1.laws[OneOrNel])
  checkAll("OneOr Nel", comonad.laws[OneOrNel])

//  "inequality exists" ! forAll {(a: OneOrList[Int]) =>
//    exists {(b: OneOrList[Int]) =>
//      propBoolean(!Equal[OneOrList[Int]].equal(a, b))
//    }
//  }

  "findLeft" ! forAll{ a: OneOr[List, Int] =>
    val f = (_: Int) % 2 == 0
    val F = Foldable[OneOr.OneOrList]
    F.findLeft(a)(f) must_=== Foldable[List].findLeft(F.toList(a))(f)
  }

  "findRight" ! forAll { a: OneOr[List, Int] =>
    val f = (_: Int) % 2 == 0
    val F = Foldable[OneOr.OneOrList]
    F.findRight(a)(f) must_=== Foldable[List].findRight(F.toList(a))(f)
  }

  object instances {
    def functor[F[_]: Functor] = Functor[OneOr[F, ?]]
    def apply[F[_]: Apply] = Apply[OneOr[F, ?]]
    def applicative[F[_]: Apply] = Applicative[OneOr[F, ?]]
    def cobind[F[_]: Cobind] = Cobind[OneOr[F, ?]]
    def comonad[F[_]: Comonad] = Comonad[OneOr[F, ?]]
    def foldable[F[_]: Foldable] = Foldable[OneOr[F, ?]]
    def foldable1[F[_]: Foldable1] = Foldable1[OneOr[F, ?]]
    def traverse[F[_]: Traverse] = Traverse[OneOr[F, ?]]
    def traverse1[F[_]: Traverse1] = Traverse1[OneOr[F, ?]]
  }

}