Ejercicio Scala calcular factorial - ScalaTest

factTest.scala

package es.poo 

import org.scalatest._
import Matchers._


class FactSpec extends FunSpec with Matchers {
 describe("Fact") {

   val valores = Map(
        0 -> 1,
        1 -> 1,
        2 -> 2,
        3 -> 6,
        4 -> 24,
        5 -> 120
       )

    valores.foreach{ case (n,esperado) => 
      it(s"debe detectar que factorial de ${n} es ${esperado}") {
        Fact.factorial(n) should be (esperado)
      }
   }
   
   it("debe lanzar excepcion con factorial de numero negativo") {
     an [Exception] should be thrownBy Fact.factorial(-2)
   }
 }
}