Test valid state transitions with scalacheck

[Pablo Fernandez]

Suppose I have this class:

case class Receipt(id: Long, state: String) {
  def transitionTo(newState: String) = {
    if (!canTransitionTo(newState)) {
       throw new IllegalStateExcetion(s"cant transition from $state to $newState")
    }
    this.copy(state = newState)
  }
}

I'd like to test the logic in canTransitionTo (not included here for the sake of simplicity) with scalachecks Commands but I'm having a bit of trouble on how to begin. Any ideas?

(I've posted this same question is on stackoverflow, just in case someone wants the extra points)