Scala example source code file (FunctorTest.scala)

This example Scala source code file (FunctorTest.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

functortest, int, option, speclite

The FunctorTest.scala Scala example source code

package scalaz

import std.AllInstances._
import std.option.some
import syntax.functor._
import org.scalacheck.Prop.forAll

object FunctorTest extends SpecLite {

  "mapply" in {
    1.mapply(some((a: Int) => a)) must_===(some(1))
  }

  "map" in {
    (some(1) ∘ (1+)) must_===(some(2))
  }

  "strength" in {
    some(1).strengthL(2) must_===(some((2, 1)))
    some(1).strengthR(2) must_===(some((1, 2)))
  }

  "fpair" in {
    some(1).fpair must_===(some((1, 1)))
  }

  "widen" ! forAll { ola: Option[List[Int]] =>
    import std.iterable._
    val oia: Option[Iterable[Int]] = ola
    ola.widen[Iterable[Int]] must_===(oia)
  }
}