package lsr.paxos.messages;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Arrays;
import lsr.paxos.storage.ConsensusInstance;
import org.junit.Before;
import org.junit.Test;
public class PrepareOKTest extends AbstractMessageTestCase<PrepareOK> {
private int view = 12;
private PrepareOK prepareOK;
private ConsensusInstance[] instances;
@Before
public void setUp() {
instances = new ConsensusInstance[3];
instances[0] = new ConsensusInstance(0);
instances[0].setValue(4, new byte[] {1, 2, 3});
instances[1] = new ConsensusInstance(1);
instances[0].setValue(5, new byte[] {1, 4, 3});
instances[2] = new ConsensusInstance(2);
instances[0].setValue(6, new byte[] {6, 9, 2});
prepareOK = new PrepareOK(view, instances);
}
@Test
public void shouldInitializeWithoutEpochVector() {
assertEquals(view, prepareOK.getView());
assertTrue(Arrays.equals(instances, prepareOK.getPrepared()));
assertArrayEquals(new long[] {}, prepareOK.getEpoch());
}
@Test
public void shouldInitializeWithEpochVector() {
prepareOK = new PrepareOK(view, instances, new long[] {1, 2, 3});
assertEquals(view, prepareOK.getView());
assertTrue(Arrays.equals(instances, prepareOK.getPrepared()));
assertArrayEquals(new long[] {1, 2, 3}, prepareOK.getEpoch());
}
@Test
public void shouldSerializeAndDeserializeWithoutEpochVector() throws IOException {
verifySerialization(prepareOK);
byte[] bytes = prepareOK.toByteArray();
assertEquals(bytes.length, prepareOK.byteSize());
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
DataInputStream dis = new DataInputStream(bis);
MessageType type = MessageType.values()[dis.readByte()];
PrepareOK deserializedPrepare = new PrepareOK(dis);
assertEquals(MessageType.PrepareOK, type);
compare(prepareOK, deserializedPrepare);
assertEquals(0, dis.available());
}
@Test
public void shouldSerializeWithEpochVector() throws IOException {
prepareOK = new PrepareOK(view, instances, new long[] {1, 2, 3});
verifySerialization(prepareOK);
byte[] bytes = prepareOK.toByteArray();
assertEquals(bytes.length, prepareOK.byteSize());
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
DataInputStream dis = new DataInputStream(bis);
MessageType type = MessageType.values()[dis.readByte()];
PrepareOK deserializedPrepare = new PrepareOK(dis);
assertEquals(MessageType.PrepareOK, type);
compare(prepareOK, deserializedPrepare);
assertEquals(0, dis.available());
}
@Test
public void shouldReturnCorrectMessageType() {
assertEquals(MessageType.PrepareOK, prepareOK.getType());
}
protected void compare(PrepareOK expected, PrepareOK actual) {
assertEquals(expected.getView(), actual.getView());
assertEquals(expected.getSentTime(), actual.getSentTime());
assertEquals(expected.getType(), actual.getType());
assertTrue(Arrays.equals(expected.getPrepared(), actual.getPrepared()));
}
}