AboutRepeatedParameters.scala

package org.functionalkoans.forscala

import org.functionalkoans.forscala.support.KoanSuite

class AboutRepeatedParameters extends KoanSuite {

  def repeatedParameterMethod(x: Int, y: String, z: Any*) = {
    "%d %ss can give you %s".format(x, y, z.mkString(", "))
  }

  koan( """A repeated parameter must be the last parameter and this will
      | let you add as many extra parameters as needed""".stripMargin('|')) {
    repeatedParameterMethod(3, "egg", "a delicious sandwich", "protein", "high cholesterol") should
    be("3 eggs can give you a delicious sandwich, protein, high cholesterol")
  }

  koan("A repeated parameter can accept a collection as the last parameter but will be considered a single object") {
    repeatedParameterMethod(3, "egg", List("a delicious sandwich", "protein", "high cholesterol")) should
    be("3 eggs can give you List(a delicious sandwich, protein, high cholesterol)")
  }

  koan("A repeated parameter can accept a collection,and if you want it expanded, add :_*") {
    repeatedParameterMethod(3, "egg", List("a delicious sandwich", "protein", "high cholesterol"):_*) should
    be("3 eggs can give you a delicious sandwich, protein, high cholesterol")
  }
}