ScalaCheck to validate jsonification with Specs2

gistfile1.scala

import models.Place
import models.Place._
import org.specs2.mutable._

import org.specs2.ScalaCheck

import play.api.libs.json.Json

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

/**
 * Add your spec here.
 * You can mock out a whole application including requests, plugins etc.
 * For more information, consult the wiki.
 */

object PlaceProp extends Properties("Place") {

  property("json idempotent") = forAll {
    p:Place =>
      Json.fromJson(Json.toJson(p)) == p
  }

  lazy val genPlace: Gen[Place] = for {
    id <- arbitrary[Long]
    name <- arbitrary[String]
    address <- arbitrary[String]
    city <- arbitrary[String]
    zipcode <- arbitrary[String]
  } yield Place(Some(id), name, address, city, zipcode)

  implicit lazy val arbHeap: Arbitrary[Place] = Arbitrary(genPlace)
}

class PlaceSpec extends Specification with ScalaCheck {
    "jsonification idempotent" ! PlaceProp
}