-import akka.actor.ActorRef;
-import akka.actor.Props;
-import akka.actor.Terminated;
-import akka.testkit.JavaTestKit;
-import akka.testkit.TestActorRef;
-import com.google.common.util.concurrent.ListeningExecutorService;
-import com.google.common.util.concurrent.MoreExecutors;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import java.util.Collections;
+import java.util.concurrent.TimeUnit;