Scala example source code file (list.scala)

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

Java - Scala tags/keywords

int, int, list, list, properties, properties, test, test

The Scala list.scala source code

import org.scalacheck._
import Prop._
import Gen._

object Test extends Properties("List") {
  def sorted(xs: List[Int]) = xs sortWith (_ < _)

  property("concat size") = forAll { (l1: List[Int], l2: List[Int]) => (l1.size + l2.size) == (l1 ::: l2).size }
  property("reverse") = forAll { (l1: List[Int]) => l1.reverse.reverse == l1 }
  property("toSet") = forAll { (l1: List[Int]) => sorted(l1.toSet.toList) sameElements sorted(l1).distinct }
  // property("flatten") = forAll { (xxs: List[List[Int]]) => xxs.flatten.length == (xxs map (_.length) sum) }
  property("startsWith/take") = forAll { (xs: List[Int], count: Int) => xs startsWith (xs take count) }
  property("endsWith/takeRight") = forAll { (xs: List[Int], count: Int) => xs endsWith (xs takeRight count) }
  property("fill") = forAll(choose(1, 100)) { count =>
    forAll { (x: Int) => 
      val xs = List.fill(count)(x)
      (xs.length == count) && (xs.distinct == List(x))
    }
  }
}