Add Java API class UntypedActorWithStash. Add tests for Stash Java API.

akka-actor-tests/src/test/java/akka/actor/StashJavaAPI.java

@@ -0,0 +1,36 @@
+package akka.actor;
+
+import akka.actor.ActorSystem;
+import akka.japi.Creator;
+import akka.testkit.AkkaSpec;
+import com.typesafe.config.ConfigFactory;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class StashJavaAPI {
+
+    private static ActorSystem system;
+
+    @BeforeClass
+	public static void beforeAll() {
+	system = ActorSystem.create("StashJavaAPI", ConfigFactory.parseString(ActorWithStashSpec.testConf()));
+    }
+
+    @AfterClass
+	public static void afterAll() {
+	system.shutdown();
+	system = null;
+    }
+
+    @Test
+	public void mustBeAbleToUseStash() {
+	ActorRef ref = system.actorOf(new Props(StashJavaAPITestActor.class).withDispatcher("my-dispatcher"));
+	ref.tell("Hello", ref);
+	ref.tell("Hello", ref);
+	ref.tell(new Object());
+    }
+
+}