Example4Test.scala

override protected def beforeAll(): Unit = {
  super.beforeAll()
  transactor = Transactor(
    (),
    (_: Unit) => Resource.pure(null),
    KleisliInterpreter[IO](
      Blocker.liftExecutionContext(ExecutionContext.global))
      .ConnectionInterpreter,
    Strategy.void
  )
}

def newStubDaoConstantPoints(points: Int, 
                             updatedPoints: AtomicInteger): Dao = new Dao {
  override def currentPoints(userId: UUID): ConnectionIO[Int] = 
    points.pure[ConnectionIO]
  override def updatePoints(userId: UUID, value: Int): ConnectionIO[Unit] = 
    Sync[ConnectionIO].delay(updatedPoints.set(value))
}