Added test for testing cluster node transitioning from UP -> LEAVING.

Signed-off-by: Jonas Bonér <jonas@jonasboner.com>

akka-cluster/src/multi-jvm/scala/akka/cluster/NodeLeaving.scala

@@ -0,0 +1,71 @@
+/**
+ *  Copyright (C) 2009-2012 Typesafe Inc. <http://www.typesafe.com>
+ */
+package akka.cluster
+
+import scala.collection.immutable.SortedSet
+import org.scalatest.BeforeAndAfter
+import com.typesafe.config.ConfigFactory
+import akka.remote.testkit.MultiNodeConfig
+import akka.remote.testkit.MultiNodeSpec
+import akka.testkit._
+
+object NodeLeavingMultiJvmSpec extends MultiNodeConfig {
+  val first = role("first")
+  val second = role("second")
+  val third = role("third")
+
+  commonConfig(
+    debugConfig(on = false)
+    .withFallback(ConfigFactory.parseString("""
+        akka.cluster.unreachable-nodes-reaper-frequency = 30000 # turn "off" reaping to unreachable node set
+      """))
+    .withFallback(MultiNodeClusterSpec.clusterConfig))
+}
+
+class NodeLeavingMultiJvmNode1 extends NodeLeavingSpec
+class NodeLeavingMultiJvmNode2 extends NodeLeavingSpec
+class NodeLeavingMultiJvmNode3 extends NodeLeavingSpec
+
+abstract class NodeLeavingSpec extends MultiNodeSpec(NodeLeavingMultiJvmSpec)
+  with MultiNodeClusterSpec with ImplicitSender with BeforeAndAfter {
+  import NodeLeavingMultiJvmSpec._
+
+  override def initialParticipants = 3
+
+  lazy val firstAddress = node(first).address
+  lazy val secondAddress = node(second).address
+  lazy val thirdAddress = node(third).address
+
+  "A node that is LEAVING a non-singleton cluster" must {
+
+    "be marked as LEAVING in the converged membership table" taggedAs LongRunningTest in {
+
+      runOn(first) {
+        cluster.self
+      }
+      testConductor.enter("first-started")
+
+      runOn(second, third) {
+        cluster.join(firstAddress)
+      }
+      awaitUpConvergence(numberOfMembers = 3)
+      testConductor.enter("rest-started")
+
+      runOn(first) {
+        cluster.leave(secondAddress)
+      }
+      testConductor.enter("second-left")
+
+      runOn(first, third) {
+        awaitCond(cluster.latestGossip.members.exists(_.status == MemberStatus.Leaving))
+
+        val hasLeft = cluster.latestGossip.members.find(_.status == MemberStatus.Leaving)
+        hasLeft must be('defined)
+        hasLeft.get.address must be(secondAddress)
+      }
+
+      testConductor.enter("finished")
+    }
+  }
+}