Scala example source code file (ZipTest.scala)

This example Scala source code file (ZipTest.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

list, nil, speclite, ziptest

The ZipTest.scala Scala example source code

package scalaz

import std.list._, std.tuple._, std.anyVal._

object ZipTest extends SpecLite {

  "Zip.ap laziness" ! {
    val F = Zip[List].ap
    def undefined[A]: List[A] = sys.error("")
    F.apply2(nil[Int], undefined[Int])(Tuple2.apply) must_=== Nil
    F.apply3(nil[Int], undefined[Int], List(1))(Tuple3.apply) must_=== Nil
    F.apply3(List(1), nil[Int], undefined[Int])(Tuple3.apply) must_=== Nil

    F.tuple2(nil[Int], undefined[Int]) must_=== Nil
    F.tuple3(nil[Int], undefined[Int], undefined[Int]) must_=== Nil
    F.tuple3(List(1), nil[Int], undefined[Int]) must_=== Nil
  }

}