handle.scala

case class Articulo ( id: String = "", descripcion: Option[String] = None, unidad: String = "", presentacion: Option[Int] = None,
		unid_med_pres: Option[String] = None, partida: String = "", cabms: Option[String] = None, cb: Option[Boolean] = None,
		iva: Option[Double] = None, baja: Option[Boolean] = None, retension_isr: Option[Double] = None ) extends Father

class FrmArticulo {
  val articulo = Articulo()
  val hdlArticulo = Handler.create[Articulo](articulo).unsafeRunSync()
  hdlArticulo.onNext(articulo)
  val hdlCveArticulo = hdlArticulo.lens[String](articulo)(_.id)((state, newState) => state.copy(id = newState))
  val cancelableCveArticulo = hdlCveArticulo.connect()
  val hdlDescripcion = hdlArticulo.lens[String](articulo)(_.descripcion.getOrElse(""))((state, newState) => state.copy(descripcion = Some(newState)))
  val cancelableDescripcion = hdlDescripcion.connect()

}

"get the last clave" should "contain a string with a folio" taggedAs GetClaveTest2 in {
      val frmArticulo = new CFrmArticulo()
      import frmArticulo._

      hdlArticulo.foreach{v =>
        println(v)
      }

      hdlCveArticulo.onNext("005.020")
      hdlDescripcion.onNext("probando otra vez")
  }

//The results are:
Articulo(005.020,None,,None,None,,None,None,None,None,None)
Articulo(,Some(probando otra vez),,None,None,,None,None,None,None,None)
//It must be:
Articulo(005.020,Some(probando otra vez),,None,None,,None,None,None,None,None)