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

   1 package org.opendaylight.controller.cluster.raft;
   2
   3 import static org.junit.Assert.assertArrayEquals;
   4 import static org.junit.Assert.assertEquals;
   5 import static org.junit.Assert.assertFalse;
   6 import static org.junit.Assert.assertTrue;
   7 import static org.mockito.Matchers.any;
   8 import static org.mockito.Matchers.anyLong;
   9 import static org.mockito.Mockito.doReturn;
  10 import static org.mockito.Mockito.doThrow;
  11 import static org.mockito.Mockito.mock;
  12 import static org.mockito.Mockito.never;
  13 import static org.mockito.Mockito.reset;
  14 import static org.mockito.Mockito.times;
  15 import static org.mockito.Mockito.verify;
  16 import akka.actor.ActorRef;
  17 import akka.japi.Procedure;
  18 import akka.persistence.SnapshotSelectionCriteria;
  19 import akka.testkit.TestActorRef;
  20 import com.google.common.collect.ImmutableMap;
  21 import java.util.Arrays;
  22 import java.util.HashMap;
  23 import org.junit.After;
  24 import org.junit.Before;
  25 import org.junit.Test;
  26 import org.mockito.ArgumentCaptor;
  27 import org.mockito.Mock;
  28 import org.mockito.MockitoAnnotations;
  29 import org.opendaylight.controller.cluster.DataPersistenceProvider;
  30 import org.opendaylight.controller.cluster.raft.SnapshotManager.LastAppliedTermInformationReader;
  31 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  32 import org.opendaylight.controller.cluster.raft.base.messages.SendInstallSnapshot;
  33 import org.opendaylight.controller.cluster.raft.behaviors.RaftActorBehavior;
  34 import org.opendaylight.controller.cluster.raft.utils.MessageCollectorActor;
  35 import org.slf4j.LoggerFactory;
  36
  37 public class SnapshotManagerTest extends AbstractActorTest {
  38
  39     @Mock
  40     private RaftActorContext mockRaftActorContext;
  41
  42     @Mock
  43     private ConfigParams mockConfigParams;
  44
  45     @Mock
  46     private ReplicatedLog mockReplicatedLog;
  47
  48     @Mock
  49     private DataPersistenceProvider mockDataPersistenceProvider;
  50
  51     @Mock
  52     private RaftActorBehavior mockRaftActorBehavior;
  53
  54     @Mock
  55     private Procedure<Void> mockProcedure;
  56
  57     private SnapshotManager snapshotManager;
  58
  59     private TestActorFactory factory;
  60
  61     private TestActorRef<MessageCollectorActor> actorRef;
  62
  63     @Before
  64     public void setUp(){
  65         MockitoAnnotations.initMocks(this);
  66
  67         doReturn(new HashMap<>()).when(mockRaftActorContext).getPeerAddresses();
  68         doReturn(mockConfigParams).when(mockRaftActorContext).getConfigParams();
  69         doReturn(10L).when(mockConfigParams).getSnapshotBatchCount();
  70         doReturn(mockReplicatedLog).when(mockRaftActorContext).getReplicatedLog();
  71         doReturn("123").when(mockRaftActorContext).getId();
  72         doReturn(mockDataPersistenceProvider).when(mockRaftActorContext).getPersistenceProvider();
  73         doReturn("123").when(mockRaftActorBehavior).getLeaderId();
  74
  75         ElectionTerm mockElectionTerm = mock(ElectionTerm.class);
  76         doReturn(mockElectionTerm).when(mockRaftActorContext).getTermInformation();
  77         doReturn(5L).when(mockElectionTerm).getCurrentTerm();
  78
  79         snapshotManager = new SnapshotManager(mockRaftActorContext, LoggerFactory.getLogger(this.getClass()));
  80         factory = new TestActorFactory(getSystem());
  81
  82         actorRef = factory.createTestActor(MessageCollectorActor.props(), factory.generateActorId("test-"));
  83         doReturn(actorRef).when(mockRaftActorContext).getActor();
  84
  85         snapshotManager.setCreateSnapshotCallable(mockProcedure);
  86     }
  87
  88     @After
  89     public void tearDown(){
  90         factory.close();
  91     }
  92
  93     @Test
  94     public void testConstruction(){
  95         assertEquals(false, snapshotManager.isCapturing());
  96     }
  97
  98     @Test
  99     public void testCaptureToInstall() throws Exception {
 100
 101         // Force capturing toInstall = true
 102         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(1, 0,
 103                 new MockRaftActorContext.MockPayload()), 0, "follower-1");
 104
 105         assertEquals(true, snapshotManager.isCapturing());
 106
 107         verify(mockProcedure).apply(null);
 108
 109         CaptureSnapshot captureSnapshot = snapshotManager.getCaptureSnapshot();
 110
 111         // LastIndex and LastTerm are picked up from the lastLogEntry
 112         assertEquals(0L, captureSnapshot.getLastIndex());
 113         assertEquals(1L, captureSnapshot.getLastTerm());
 114
 115         // Since the actor does not have any followers (no peer addresses) lastApplied will be from lastLogEntry
 116         assertEquals(0L, captureSnapshot.getLastAppliedIndex());
 117         assertEquals(1L, captureSnapshot.getLastAppliedTerm());
 118
 119         //
 120         assertEquals(-1L, captureSnapshot.getReplicatedToAllIndex());
 121         assertEquals(-1L, captureSnapshot.getReplicatedToAllTerm());
 122         actorRef.underlyingActor().clear();
 123     }
 124
 125     @Test
 126     public void testCapture() throws Exception {
 127         boolean capture = snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(1,9,
 128                 new MockRaftActorContext.MockPayload()), 9);
 129
 130         assertTrue(capture);
 131
 132         assertEquals(true, snapshotManager.isCapturing());
 133
 134         verify(mockProcedure).apply(null);
 135
 136         CaptureSnapshot captureSnapshot = snapshotManager.getCaptureSnapshot();
 137
 138         // LastIndex and LastTerm are picked up from the lastLogEntry
 139         assertEquals(9L, captureSnapshot.getLastIndex());
 140         assertEquals(1L, captureSnapshot.getLastTerm());
 141
 142         // Since the actor does not have any followers (no peer addresses) lastApplied will be from lastLogEntry
 143         assertEquals(9L, captureSnapshot.getLastAppliedIndex());
 144         assertEquals(1L, captureSnapshot.getLastAppliedTerm());
 145
 146         //
 147         assertEquals(-1L, captureSnapshot.getReplicatedToAllIndex());
 148         assertEquals(-1L, captureSnapshot.getReplicatedToAllTerm());
 149
 150         actorRef.underlyingActor().clear();
 151
 152     }
 153
 154     @Test
 155     public void testCaptureWithCreateProcedureError () throws Exception {
 156         doThrow(new Exception("mock")).when(mockProcedure).apply(null);
 157
 158         boolean capture = snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(1,9,
 159                 new MockRaftActorContext.MockPayload()), 9);
 160
 161         assertFalse(capture);
 162
 163         assertEquals(false, snapshotManager.isCapturing());
 164
 165         verify(mockProcedure).apply(null);
 166     }
 167
 168     @Test
 169     public void testIllegalCapture() throws Exception {
 170         boolean capture = snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(1,9,
 171                 new MockRaftActorContext.MockPayload()), 9);
 172
 173         assertTrue(capture);
 174
 175         verify(mockProcedure).apply(null);
 176
 177         reset(mockProcedure);
 178
 179         // This will not cause snapshot capture to start again
 180         capture = snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(1,9,
 181                 new MockRaftActorContext.MockPayload()), 9);
 182
 183         assertFalse(capture);
 184
 185         verify(mockProcedure, never()).apply(null);
 186     }
 187
 188     @Test
 189     public void testPersistWhenReplicatedToAllIndexMinusOne(){
 190         doReturn(7L).when(mockReplicatedLog).getSnapshotIndex();
 191         doReturn(1L).when(mockReplicatedLog).getSnapshotTerm();
 192
 193         doReturn(ImmutableMap.builder().put("follower-1", "").build()).when(mockRaftActorContext).getPeerAddresses();
 194
 195         doReturn(8L).when(mockRaftActorContext).getLastApplied();
 196
 197         MockRaftActorContext.MockReplicatedLogEntry lastLogEntry = new MockRaftActorContext.MockReplicatedLogEntry(
 198                 3L, 9L, new MockRaftActorContext.MockPayload());
 199
 200         MockRaftActorContext.MockReplicatedLogEntry lastAppliedEntry = new MockRaftActorContext.MockReplicatedLogEntry(
 201                 2L, 8L, new MockRaftActorContext.MockPayload());
 202
 203         doReturn(lastAppliedEntry).when(mockReplicatedLog).get(8L);
 204         doReturn(Arrays.asList(lastLogEntry)).when(mockReplicatedLog).getFrom(9L);
 205
 206         // when replicatedToAllIndex = -1
 207         snapshotManager.capture(lastLogEntry, -1);
 208
 209         byte[] bytes = new byte[] {1,2,3,4,5,6,7,8,9,10};
 210         snapshotManager.persist(bytes, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 211
 212         ArgumentCaptor<Snapshot> snapshotArgumentCaptor = ArgumentCaptor.forClass(Snapshot.class);
 213         verify(mockDataPersistenceProvider).saveSnapshot(snapshotArgumentCaptor.capture());
 214
 215         Snapshot snapshot = snapshotArgumentCaptor.getValue();
 216
 217         assertEquals("getLastTerm", 3L, snapshot.getLastTerm());
 218         assertEquals("getLastIndex", 9L, snapshot.getLastIndex());
 219         assertEquals("getLastAppliedTerm", 2L, snapshot.getLastAppliedTerm());
 220         assertEquals("getLastAppliedIndex", 8L, snapshot.getLastAppliedIndex());
 221         assertArrayEquals("getState", bytes, snapshot.getState());
 222         assertEquals("getUnAppliedEntries", Arrays.asList(lastLogEntry), snapshot.getUnAppliedEntries());
 223
 224         verify(mockReplicatedLog).snapshotPreCommit(7L, 1L);
 225     }
 226
 227     @Test
 228     public void testPersistWhenReplicatedToAllIndexNotMinus(){
 229         doReturn(45L).when(mockReplicatedLog).getSnapshotIndex();
 230         doReturn(6L).when(mockReplicatedLog).getSnapshotTerm();
 231         ReplicatedLogEntry replicatedLogEntry = mock(ReplicatedLogEntry.class);
 232         doReturn(replicatedLogEntry).when(mockReplicatedLog).get(9);
 233         doReturn(6L).when(replicatedLogEntry).getTerm();
 234         doReturn(9L).when(replicatedLogEntry).getIndex();
 235
 236         // when replicatedToAllIndex != -1
 237         snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(6,9,
 238                 new MockRaftActorContext.MockPayload()), 9);
 239
 240         byte[] bytes = new byte[] {1,2,3,4,5,6,7,8,9,10};
 241         snapshotManager.persist(bytes, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 242
 243         ArgumentCaptor<Snapshot> snapshotArgumentCaptor = ArgumentCaptor.forClass(Snapshot.class);
 244         verify(mockDataPersistenceProvider).saveSnapshot(snapshotArgumentCaptor.capture());
 245
 246         Snapshot snapshot = snapshotArgumentCaptor.getValue();
 247
 248         assertEquals("getLastTerm", 6L, snapshot.getLastTerm());
 249         assertEquals("getLastIndex", 9L, snapshot.getLastIndex());
 250         assertEquals("getLastAppliedTerm", 6L, snapshot.getLastAppliedTerm());
 251         assertEquals("getLastAppliedIndex", 9L, snapshot.getLastAppliedIndex());
 252         assertArrayEquals("getState", bytes, snapshot.getState());
 253         assertEquals("getUnAppliedEntries size", 0, snapshot.getUnAppliedEntries().size());
 254
 255         verify(mockReplicatedLog).snapshotPreCommit(9L, 6L);
 256
 257         verify(mockRaftActorBehavior).setReplicatedToAllIndex(9);
 258     }
 259
 260
 261     @Test
 262     public void testPersistWhenReplicatedLogDataSizeGreaterThanThreshold(){
 263         doReturn(Integer.MAX_VALUE).when(mockReplicatedLog).dataSize();
 264
 265         // when replicatedToAllIndex = -1
 266         snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(6,9,
 267                 new MockRaftActorContext.MockPayload()), -1);
 268
 269         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 270
 271         verify(mockDataPersistenceProvider).saveSnapshot(any(Snapshot.class));
 272
 273         verify(mockReplicatedLog).snapshotPreCommit(9L, 6L);
 274     }
 275
 276     @Test
 277     public void testPersistSendInstallSnapshot(){
 278         doReturn(Integer.MAX_VALUE).when(mockReplicatedLog).dataSize();
 279
 280         // when replicatedToAllIndex = -1
 281         boolean capture = snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 282                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 283
 284         assertTrue(capture);
 285
 286         byte[] bytes = new byte[] {1,2,3,4,5,6,7,8,9,10};
 287
 288         snapshotManager.persist(bytes, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 289
 290         verify(mockDataPersistenceProvider).saveSnapshot(any(Snapshot.class));
 291
 292         verify(mockReplicatedLog).snapshotPreCommit(9L, 6L);
 293
 294         ArgumentCaptor<SendInstallSnapshot> sendInstallSnapshotArgumentCaptor
 295                 = ArgumentCaptor.forClass(SendInstallSnapshot.class);
 296
 297         verify(mockRaftActorBehavior).handleMessage(any(ActorRef.class), sendInstallSnapshotArgumentCaptor.capture());
 298
 299         SendInstallSnapshot sendInstallSnapshot = sendInstallSnapshotArgumentCaptor.getValue();
 300
 301         assertTrue(Arrays.equals(bytes, sendInstallSnapshot.getSnapshot().toByteArray()));
 302     }
 303
 304     @Test
 305     public void testCallingPersistWithoutCaptureWillDoNothing(){
 306         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 307
 308         verify(mockDataPersistenceProvider, never()).saveSnapshot(any(Snapshot.class));
 309
 310         verify(mockReplicatedLog, never()).snapshotPreCommit(9L, 6L);
 311
 312         verify(mockRaftActorBehavior, never()).handleMessage(any(ActorRef.class), any(SendInstallSnapshot.class));
 313     }
 314     @Test
 315     public void testCallingPersistTwiceWillDoNoHarm(){
 316         doReturn(Integer.MAX_VALUE).when(mockReplicatedLog).dataSize();
 317
 318         // when replicatedToAllIndex = -1
 319         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 320                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 321
 322         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 323
 324         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 325
 326         verify(mockDataPersistenceProvider).saveSnapshot(any(Snapshot.class));
 327
 328         verify(mockReplicatedLog).snapshotPreCommit(9L, 6L);
 329
 330         verify(mockRaftActorBehavior).handleMessage(any(ActorRef.class), any(SendInstallSnapshot.class));
 331     }
 332
 333     @Test
 334     public void testCommit(){
 335         doReturn(50L).when(mockDataPersistenceProvider).getLastSequenceNumber();
 336
 337         // when replicatedToAllIndex = -1
 338         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 339                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 340
 341         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 342
 343         snapshotManager.commit(100L);
 344
 345         verify(mockReplicatedLog).snapshotCommit();
 346
 347         verify(mockDataPersistenceProvider).deleteMessages(50L);
 348
 349         ArgumentCaptor<SnapshotSelectionCriteria> criteriaCaptor = ArgumentCaptor.forClass(SnapshotSelectionCriteria.class);
 350
 351         verify(mockDataPersistenceProvider).deleteSnapshots(criteriaCaptor.capture());
 352
 353         assertEquals(90, criteriaCaptor.getValue().maxSequenceNr()); // sequenceNumber = 100
 354                                                                      // config snapShotBatchCount = 10
 355                                                                      // therefore maxSequenceNumber = 90
 356     }
 357
 358     @Test
 359     public void testCommitBeforePersist(){
 360         // when replicatedToAllIndex = -1
 361         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 362                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 363
 364         snapshotManager.commit(100L);
 365
 366         verify(mockReplicatedLog, never()).snapshotCommit();
 367
 368         verify(mockDataPersistenceProvider, never()).deleteMessages(100L);
 369
 370         verify(mockDataPersistenceProvider, never()).deleteSnapshots(any(SnapshotSelectionCriteria.class));
 371
 372     }
 373
 374     @Test
 375     public void testCommitBeforeCapture(){
 376         snapshotManager.commit(100L);
 377
 378         verify(mockReplicatedLog, never()).snapshotCommit();
 379
 380         verify(mockDataPersistenceProvider, never()).deleteMessages(anyLong());
 381
 382         verify(mockDataPersistenceProvider, never()).deleteSnapshots(any(SnapshotSelectionCriteria.class));
 383
 384     }
 385
 386     @Test
 387     public void testCallingCommitMultipleTimesCausesNoHarm(){
 388         doReturn(50L).when(mockDataPersistenceProvider).getLastSequenceNumber();
 389
 390         // when replicatedToAllIndex = -1
 391         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 392                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 393
 394         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 395
 396         snapshotManager.commit(100L);
 397
 398         snapshotManager.commit(100L);
 399
 400         verify(mockReplicatedLog, times(1)).snapshotCommit();
 401
 402         verify(mockDataPersistenceProvider, times(1)).deleteMessages(50L);
 403
 404         verify(mockDataPersistenceProvider, times(1)).deleteSnapshots(any(SnapshotSelectionCriteria.class));
 405     }
 406
 407     @Test
 408     public void testRollback(){
 409         // when replicatedToAllIndex = -1
 410         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 411                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 412
 413         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 414
 415         snapshotManager.rollback();
 416
 417         verify(mockReplicatedLog).snapshotRollback();
 418     }
 419
 420
 421     @Test
 422     public void testRollbackBeforePersist(){
 423         // when replicatedToAllIndex = -1
 424         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 425                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 426
 427         snapshotManager.rollback();
 428
 429         verify(mockReplicatedLog, never()).snapshotRollback();
 430     }
 431
 432     @Test
 433     public void testRollbackBeforeCapture(){
 434         snapshotManager.rollback();
 435
 436         verify(mockReplicatedLog, never()).snapshotRollback();
 437     }
 438
 439     @Test
 440     public void testCallingRollbackMultipleTimesCausesNoHarm(){
 441         // when replicatedToAllIndex = -1
 442         snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(6, 9,
 443                 new MockRaftActorContext.MockPayload()), -1, "follower-1");
 444
 445         snapshotManager.persist(new byte[]{}, mockRaftActorBehavior, Runtime.getRuntime().totalMemory());
 446
 447         snapshotManager.rollback();
 448
 449         snapshotManager.rollback();
 450
 451         verify(mockReplicatedLog, times(1)).snapshotRollback();
 452     }
 453
 454     @Test
 455     public void testTrimLogWhenTrimIndexLessThanLastApplied() {
 456         doReturn(20L).when(mockRaftActorContext).getLastApplied();
 457
 458         ReplicatedLogEntry replicatedLogEntry = mock(ReplicatedLogEntry.class);
 459         doReturn(true).when(mockReplicatedLog).isPresent(10);
 460         doReturn(replicatedLogEntry).when((mockReplicatedLog)).get(10);
 461         doReturn(5L).when(replicatedLogEntry).getTerm();
 462
 463         long retIndex = snapshotManager.trimLog(10, mockRaftActorBehavior);
 464         assertEquals("return index", 10L, retIndex);
 465
 466         verify(mockReplicatedLog).snapshotPreCommit(10, 5);
 467         verify(mockReplicatedLog).snapshotCommit();
 468
 469         verify(mockRaftActorBehavior, never()).setReplicatedToAllIndex(anyLong());
 470     }
 471
 472     @Test
 473     public void testTrimLogWhenLastAppliedNotSet() {
 474         doReturn(-1L).when(mockRaftActorContext).getLastApplied();
 475
 476         ReplicatedLogEntry replicatedLogEntry = mock(ReplicatedLogEntry.class);
 477         doReturn(true).when(mockReplicatedLog).isPresent(10);
 478         doReturn(replicatedLogEntry).when((mockReplicatedLog)).get(10);
 479         doReturn(5L).when(replicatedLogEntry).getTerm();
 480
 481         long retIndex = snapshotManager.trimLog(10, mockRaftActorBehavior);
 482         assertEquals("return index", -1L, retIndex);
 483
 484         verify(mockReplicatedLog, never()).snapshotPreCommit(anyLong(), anyLong());
 485         verify(mockReplicatedLog, never()).snapshotCommit();
 486
 487         verify(mockRaftActorBehavior, never()).setReplicatedToAllIndex(anyLong());
 488     }
 489
 490     @Test
 491     public void testTrimLogWhenLastAppliedZero() {
 492         doReturn(0L).when(mockRaftActorContext).getLastApplied();
 493
 494         ReplicatedLogEntry replicatedLogEntry = mock(ReplicatedLogEntry.class);
 495         doReturn(true).when(mockReplicatedLog).isPresent(10);
 496         doReturn(replicatedLogEntry).when((mockReplicatedLog)).get(10);
 497         doReturn(5L).when(replicatedLogEntry).getTerm();
 498
 499         long retIndex = snapshotManager.trimLog(10, mockRaftActorBehavior);
 500         assertEquals("return index", -1L, retIndex);
 501
 502         verify(mockReplicatedLog, never()).snapshotPreCommit(anyLong(), anyLong());
 503         verify(mockReplicatedLog, never()).snapshotCommit();
 504
 505         verify(mockRaftActorBehavior, never()).setReplicatedToAllIndex(anyLong());
 506     }
 507
 508     @Test
 509     public void testTrimLogWhenTrimIndexNotPresent() {
 510         doReturn(20L).when(mockRaftActorContext).getLastApplied();
 511
 512         doReturn(false).when(mockReplicatedLog).isPresent(10);
 513
 514         long retIndex = snapshotManager.trimLog(10, mockRaftActorBehavior);
 515         assertEquals("return index", -1L, retIndex);
 516
 517         verify(mockReplicatedLog, never()).snapshotPreCommit(anyLong(), anyLong());
 518         verify(mockReplicatedLog, never()).snapshotCommit();
 519
 520         // Trim index is greater than replicatedToAllIndex so should update it.
 521         verify(mockRaftActorBehavior).setReplicatedToAllIndex(10L);
 522     }
 523
 524     @Test
 525     public void testTrimLogAfterCapture(){
 526         boolean capture = snapshotManager.capture(new MockRaftActorContext.MockReplicatedLogEntry(1,9,
 527                 new MockRaftActorContext.MockPayload()), 9);
 528
 529         assertTrue(capture);
 530
 531         assertEquals(true, snapshotManager.isCapturing());
 532
 533         ReplicatedLogEntry replicatedLogEntry = mock(ReplicatedLogEntry.class);
 534         doReturn(20L).when(mockRaftActorContext).getLastApplied();
 535         doReturn(true).when(mockReplicatedLog).isPresent(10);
 536         doReturn(replicatedLogEntry).when((mockReplicatedLog)).get(10);
 537         doReturn(5L).when(replicatedLogEntry).getTerm();
 538
 539         snapshotManager.trimLog(10, mockRaftActorBehavior);
 540
 541         verify(mockReplicatedLog, never()).snapshotPreCommit(anyLong(), anyLong());
 542         verify(mockReplicatedLog, never()).snapshotCommit();
 543
 544     }
 545
 546     @Test
 547     public void testTrimLogAfterCaptureToInstall(){
 548         boolean capture = snapshotManager.captureToInstall(new MockRaftActorContext.MockReplicatedLogEntry(1,9,
 549                 new MockRaftActorContext.MockPayload()), 9, "follower-1");
 550
 551         assertTrue(capture);
 552
 553         assertEquals(true, snapshotManager.isCapturing());
 554
 555         ReplicatedLogEntry replicatedLogEntry = mock(ReplicatedLogEntry.class);
 556         doReturn(20L).when(mockRaftActorContext).getLastApplied();
 557         doReturn(true).when(mockReplicatedLog).isPresent(10);
 558         doReturn(replicatedLogEntry).when((mockReplicatedLog)).get(10);
 559         doReturn(5L).when(replicatedLogEntry).getTerm();
 560
 561         snapshotManager.trimLog(10, mockRaftActorBehavior);
 562
 563         verify(mockReplicatedLog, never()).snapshotPreCommit(10, 5);
 564         verify(mockReplicatedLog, never()).snapshotCommit();
 565
 566     }
 567
 568     @Test
 569     public void testLastAppliedTermInformationReader() {
 570
 571         LastAppliedTermInformationReader reader = new LastAppliedTermInformationReader();
 572
 573         doReturn(4L).when(mockReplicatedLog).getSnapshotTerm();
 574         doReturn(7L).when(mockReplicatedLog).getSnapshotIndex();
 575
 576         ReplicatedLogEntry lastLogEntry = new MockRaftActorContext.MockReplicatedLogEntry(6L, 9L,
 577                 new MockRaftActorContext.MockPayload());
 578
 579         // No followers and valid lastLogEntry
 580         reader.init(mockReplicatedLog, 1L, lastLogEntry, false);
 581
 582         assertEquals("getTerm", 6L, reader.getTerm());
 583         assertEquals("getIndex", 9L, reader.getIndex());
 584
 585         // No followers and null lastLogEntry
 586         reader.init(mockReplicatedLog, 1L, null, false);
 587
 588         assertEquals("getTerm", -1L, reader.getTerm());
 589         assertEquals("getIndex", -1L, reader.getIndex());
 590
 591         // Followers and valid originalIndex entry
 592         doReturn(new MockRaftActorContext.MockReplicatedLogEntry(5L, 8L,
 593                 new MockRaftActorContext.MockPayload())).when(mockReplicatedLog).get(8L);
 594         reader.init(mockReplicatedLog, 8L, lastLogEntry, true);
 595
 596         assertEquals("getTerm", 5L, reader.getTerm());
 597         assertEquals("getIndex", 8L, reader.getIndex());
 598
 599         // Followers and null originalIndex entry and valid snapshot index
 600         reader.init(mockReplicatedLog, 7L, lastLogEntry, true);
 601
 602         assertEquals("getTerm", 4L, reader.getTerm());
 603         assertEquals("getIndex", 7L, reader.getIndex());
 604
 605         // Followers and null originalIndex entry and invalid snapshot index
 606         doReturn(-1L).when(mockReplicatedLog).getSnapshotIndex();
 607         reader.init(mockReplicatedLog, 7L, lastLogEntry, true);
 608
 609         assertEquals("getTerm", -1L, reader.getTerm());
 610         assertEquals("getIndex", -1L, reader.getIndex());
 611     }
 612 }