Test code for the implicits + future article

DAO sample

case class Employee(id:Long, name:String)
case class Role(name:String,department:String)
case class EmployeeWithRole(id:Long,name:String,role:Role)

trait EmployeeGrabbedBabber{
  def rawEmployee(id:Int) :Employee
  def rawRole(e:Employee)  :Role
  def employee(id:Int)(implicit e:ExecutionContext) :Future[Employee]
  def role(employee:Employee)(implicit e:ExecutionContext) : Future[Role]
}
/* This is test code that fakes some delays. Don't sleep on threads on production code! */
object DAO extends EmployeeGrabbedBabber{
  private def delay[T,V](f:(T)=>V,millis:Int)(t:T)(implicit ec: ExecutionContext):Future[V] = {
    Future{
      Thread.sleep(millis)
      f(t)
    }
  }

  def rawEmployee(id:Int) = new Employee(id,"Bob"+id)
  def rawRole(e:Employee) = new Role(s"{whatever ${e.name} does", "Accounting")

  def employee(id:Int)(implicit e:ExecutionContext) = delay(rawEmployee _,200)(id)(e)
  def role(employee:Employee)(implicit e:ExecutionContext) = delay(rawRole _ ,100)(employee)(e)
}