Bonusoppgave for extractors

DateExtractorsTest

package scalakurs.patternmatching

import org.scalatest.FunSpec
import org.scalatest.matchers.ShouldMatchers

class DateExtractorsTest extends FunSpec with ShouldMatchers {

  describe("IsoDate unapply") {
    it("\"2013-10-29\" should return Some((2013, 10, 29))") {
      "2013-10-29" match {
        case IsoDate(year, month, date) =>
        case _ => fail
      }
    }
    it("\"2013-10-30\" should return Some((2013, 10, 30))") {
      "2013-10-30" match {
        case IsoDate(year, month, date) =>
        case _ => fail
      }
    }
    it("\"notADate\" should return None") {
      IsoDate.unapply("ikkeEnDato") should be (None)
    }
    it("\"2013-oct-29\" should return None (month not an int)") {
      IsoDate.unapply("2013-oct-29") should be (None)
    }
    it("\"2013-0-10\" should return None (month less than 1)") {
      IsoDate.unapply("2013-0-10") should be (None)
    }
    it("\"2013-20-10\" should return None (month larger than 12)") {
      IsoDate.unapply("2013-20-10") should be (None)
    }
    it("\"2013-10-0\" should return None (date less than 1)") {
      IsoDate.unapply("2013-10-40") should be (None)
    }
    it("\"2013-10-40\" should return None (date larger than 31)") {
      IsoDate.unapply("2013-10-40") should be (None)
    }
    it("\"2013-02-30\" should return None (illegal date)") {
      IsoDate.unapply("2013-02-30") should be (None)
    }
  }
}

object IsoDate {
  def unapply(str: String): Option[(Int, Int, Int)] = ???
}