pekko/akka-distributed-data/src/test/scala/akka/cluster/ddata/FlagSpec.scala

/**
 * Copyright (C) 2009-2016 Lightbend Inc. <http://www.lightbend.com>
 */

package akka.cluster.ddata

import akka.cluster.ddata.Replicator.Changed
import org.scalatest.Matchers
import org.scalatest.WordSpec

class FlagSpec extends WordSpec with Matchers {

  "A Flag" must {

    "be able to switch on once" in {
      val f1 = Flag()
      val f2 = f1.switchOn
      val f3 = f2.switchOn
      f1.enabled should be(false)
      f2.enabled should be(true)
      f3.enabled should be(true)
    }

    "merge by picking true" in {
      val f1 = Flag()
      val f2 = f1.switchOn
      val m1 = f1 merge f2
      m1.enabled should be(true)
      val m2 = f2 merge f1
      m2.enabled should be(true)
    }

    "have unapply extractor" in {
      val f1 = Flag.empty.switchOn
      val Flag(value1) = f1
      val value2: Boolean = value1
      Changed(FlagKey("key"))(f1) match {
        case c @ Changed(FlagKey("key")) ⇒
          val Flag(value3) = c.dataValue
          val value4: Boolean = value3
          value4 should be(true)
      }
    }
  }
}