opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/SnapshotTest.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.raft;
   9
  10 import static org.junit.Assert.assertArrayEquals;
  11 import static org.junit.Assert.assertEquals;
  12
  13 import java.io.FileInputStream;
  14 import java.io.FileOutputStream;
  15 import java.io.IOException;
  16 import java.io.ObjectInputStream;
  17 import java.io.ObjectOutputStream;
  18 import java.util.ArrayList;
  19 import java.util.List;
  20 import org.junit.Test;
  21 import org.opendaylight.controller.cluster.raft.MockRaftActorContext.MockPayload;
  22
  23 /**
  24  * Unit tests for Snapshot.
  25  *
  26  * @author Thomas Pantelis
  27  */
  28 public class SnapshotTest {
  29
  30     @Test
  31     public void testBackwardsCompatibleDeserializationFromLithium() throws Exception {
  32         Snapshot expSnapshot = newLithiumSnapshot();
  33         try (FileInputStream fis = new FileInputStream("src/test/resources/lithium-serialized-Snapshot")) {
  34             ObjectInputStream ois = new ObjectInputStream(fis);
  35
  36             Snapshot snapshot = (Snapshot) ois.readObject();
  37             ois.close();
  38
  39             assertEquals("lastIndex", expSnapshot.getLastIndex(), snapshot.getLastIndex());
  40             assertEquals("lastTerm", expSnapshot.getLastTerm(), snapshot.getLastTerm());
  41             assertEquals("lastAppliedIndex", expSnapshot.getLastAppliedIndex(), snapshot.getLastAppliedIndex());
  42             assertEquals("lastAppliedTerm", expSnapshot.getLastAppliedTerm(), snapshot.getLastAppliedTerm());
  43             assertEquals("unAppliedEntries size", expSnapshot.getUnAppliedEntries().size(),
  44                     snapshot.getUnAppliedEntries().size());
  45             assertArrayEquals("state", expSnapshot.getState(), snapshot.getState());
  46             assertEquals("electionTerm", 0, snapshot.getElectionTerm());
  47             assertEquals("electionVotedFor", null, snapshot.getElectionVotedFor());
  48         }
  49     }
  50
  51     private static Snapshot newLithiumSnapshot() {
  52         byte[] state = {1, 2, 3, 4, 5};
  53         List<ReplicatedLogEntry> entries = new ArrayList<>();
  54         entries.add(new ReplicatedLogImplEntry(6, 2, new MockPayload("payload")));
  55         long lastIndex = 6;
  56         long lastTerm = 2;
  57         long lastAppliedIndex = 5;
  58         long lastAppliedTerm = 1;
  59
  60         return Snapshot.create(state, entries, lastIndex, lastTerm, lastAppliedIndex, lastAppliedTerm);
  61     }
  62
  63     /**
  64      * Use this method to generate a file with a serialized Snapshot instance to be
  65      * used in tests that verify backwards compatible de-serialization.
  66      */
  67     @SuppressWarnings("unused")
  68     private static void generateSerializedFile(Snapshot snapshot, String fileName) throws IOException {
  69         FileOutputStream fos = new FileOutputStream("src/test/resources/" + fileName);
  70         ObjectOutputStream oos = new ObjectOutputStream(fos);
  71         oos.writeObject(snapshot);
  72         fos.close();
  73     }
  74 }