import scala.concurrent._
import scala.concurrent.duration._
import ExecutionContext.Implicits.global
import scala.language.postfixOps 
import scala.language.reflectiveCalls

lazy val f = Future {
  import CW8b._

  assert(sread(Map(), 2) == 0)
  assert(sread(Map(2 -> 1), 2) == 1)
  assert(write(Map(), 1, 2) == Map(1 -> 2))
  assert(write(Map(1 -> 0), 1, 2) == Map(1 -> 2))
}

Await.result(f, 120 second)