Scala example source code file (DisjunctionTest.scala)

This example Scala source code file (DisjunctionTest.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.

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Java - Scala tags/keywords

bar, baz, disjunctiontest, foo, hello, int, partialfunction, speclite, throwable

The DisjunctionTest.scala Scala example source code

package scalaz

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

object DisjunctionTest extends SpecLite {

  checkAll(order.laws[Int \/ Int])
  checkAll(monoid.laws[Int \/ Int])
  checkAll(bindRec.laws[Int \/ ?])
  checkAll(monad.laws[Int \/ ?])
  checkAll(monadError.laws[Int \/ ?, Int])
  checkAll(plus.laws[Int \/ ?])
  checkAll(traverse.laws[Int \/ ?])
  checkAll(bitraverse.laws[\/])
  checkAll(associative.laws[\/])

  "fromTryCatchThrowable" in {
    class Foo extends Throwable
    final class Bar extends Foo
    val foo = new Foo
    val bar = new Bar

    implicit val equalFoo = Equal.equalA[Foo]
    implicit val showFoo = Show.showA[Foo]
    implicit val equalBar = Equal.equalA[Bar]
    implicit val showBar = Show.showA[Bar]

    \/.fromTryCatchThrowable[Int, Foo](1) must_=== \/.right(1)
    \/.fromTryCatchThrowable[Int, Foo](throw foo) must_=== \/.left(foo)
    \/.fromTryCatchThrowable[Int, Foo](throw bar) must_=== \/.left(bar)
    \/.fromTryCatchThrowable[Int, Bar](throw foo).mustThrowA[Foo]
  }

  "recover" in {
    sealed trait Foo
    case object Bar extends Foo
    case object Baz extends Foo

    implicit val equalFoo = Equal.equalA[Foo]
    implicit val showFoo = Show.showA[Foo]

    -\/[Foo](Bar).recover({ case Bar => 1 }) must_=== \/-(1)
    -\/[Foo](Bar).recover({ case Baz => 1 }) must_=== -\/(Bar)
    \/.right[Foo, Int](1).recover({ case Bar => 4 }) must_=== \/-(1)
  }

  "recoverWith" in {
    sealed trait Foo
    case object Bar extends Foo
    case object Baz extends Foo

    implicit val equalFoo = Equal.equalA[Foo]
    implicit val showFoo = Show.showA[Foo]

    val barToBaz: PartialFunction[Foo, \/[Foo, Int]] = {
      case Bar => -\/(Baz)
    }

    val bazToInt: PartialFunction[Foo, \/[Foo, Int]] = {
      case Baz => \/-(1)
    }

    -\/[Foo](Bar).recoverWith(barToBaz) must_=== -\/(Baz)
    -\/[Foo](Bar).recoverWith(bazToInt) must_=== -\/(Bar)
    \/.right[Foo, Int](1).recoverWith(barToBaz) must_=== \/-(1)
  }

  "validation" in {
    import syntax.either._
    import syntax.validation._

    3.right[String].validation must_=== 3.success[String]
    "Hello".left[Int].validation must_=== "Hello".failure[Int]
  }

  "validationNel" in {
    import syntax.either._
    import syntax.validation._
    import syntax.apply._

    3.right[String].validationNel must_=== 3.successNel[String]
    ("hello".left[Int].validationNel |@| "world".left[Int].validationNel).tupled must_===
      ("hello".failureNel[Int] |@| "world".failureNel[Int]).tupled
  }
}