Merge "Avoid IllegalArgument on missing source"
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / test / java / org / opendaylight / controller / cluster / datastore / TransactionProxyTest.java
index 6573308c12100914badbedc5d0296b90e096a2b7..265ec59f1cd324889627281850ffae9ed456c52a 100644 (file)
@@ -6,11 +6,10 @@ import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyString;
-import static org.mockito.Matchers.argThat;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Matchers.isA;
 import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.opendaylight.controller.cluster.datastore.TransactionProxy.TransactionType.READ_ONLY;
@@ -21,78 +20,47 @@ import akka.actor.ActorSelection;
 import akka.actor.ActorSystem;
 import akka.actor.Props;
 import akka.dispatch.Futures;
-import akka.testkit.JavaTestKit;
 import com.google.common.base.Optional;
-import com.google.common.collect.ImmutableMap;
 import com.google.common.util.concurrent.CheckedFuture;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Uninterruptibles;
-import com.typesafe.config.Config;
-import com.typesafe.config.ConfigFactory;
-import java.io.IOException;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
-import org.junit.AfterClass;
 import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
 import org.junit.Test;
-import org.mockito.ArgumentCaptor;
-import org.mockito.ArgumentMatcher;
 import org.mockito.InOrder;
-import org.mockito.Mock;
 import org.mockito.Mockito;
-import org.mockito.MockitoAnnotations;
-import org.opendaylight.controller.cluster.datastore.DatastoreContext.Builder;
 import org.opendaylight.controller.cluster.datastore.TransactionProxy.TransactionType;
+import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
+import org.opendaylight.controller.cluster.datastore.exceptions.NotInitializedException;
 import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
 import org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException;
 import org.opendaylight.controller.cluster.datastore.messages.BatchedModifications;
 import org.opendaylight.controller.cluster.datastore.messages.BatchedModificationsReply;
 import org.opendaylight.controller.cluster.datastore.messages.CloseTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.DataExists;
-import org.opendaylight.controller.cluster.datastore.messages.DataExistsReply;
-import org.opendaylight.controller.cluster.datastore.messages.DeleteData;
-import org.opendaylight.controller.cluster.datastore.messages.DeleteDataReply;
-import org.opendaylight.controller.cluster.datastore.messages.MergeData;
-import org.opendaylight.controller.cluster.datastore.messages.MergeDataReply;
-import org.opendaylight.controller.cluster.datastore.messages.ReadData;
-import org.opendaylight.controller.cluster.datastore.messages.ReadDataReply;
 import org.opendaylight.controller.cluster.datastore.messages.ReadyTransaction;
-import org.opendaylight.controller.cluster.datastore.messages.ReadyTransactionReply;
-import org.opendaylight.controller.cluster.datastore.messages.WriteData;
-import org.opendaylight.controller.cluster.datastore.messages.WriteDataReply;
-import org.opendaylight.controller.cluster.datastore.modification.AbstractModification;
 import org.opendaylight.controller.cluster.datastore.modification.DeleteModification;
 import org.opendaylight.controller.cluster.datastore.modification.MergeModification;
-import org.opendaylight.controller.cluster.datastore.modification.Modification;
 import org.opendaylight.controller.cluster.datastore.modification.WriteModification;
 import org.opendaylight.controller.cluster.datastore.shardstrategy.DefaultShardStrategy;
-import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
-import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
 import org.opendaylight.controller.cluster.datastore.utils.DoNothingActor;
-import org.opendaylight.controller.cluster.datastore.utils.MockConfiguration;
 import org.opendaylight.controller.md.cluster.datastore.model.CarsModel;
 import org.opendaylight.controller.md.cluster.datastore.model.TestModel;
 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
-import org.opendaylight.controller.protobuff.messages.transaction.ShardTransactionMessages;
 import org.opendaylight.controller.protobuff.messages.transaction.ShardTransactionMessages.CreateTransactionReply;
 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
 import scala.concurrent.Await;
 import scala.concurrent.Future;
 import scala.concurrent.Promise;
 import scala.concurrent.duration.Duration;
 
 @SuppressWarnings("resource")
-public class TransactionProxyTest {
+public class TransactionProxyTest extends AbstractTransactionProxyTest {
 
     @SuppressWarnings("serial")
     static class TestException extends RuntimeException {
@@ -102,291 +70,6 @@ public class TransactionProxyTest {
         CheckedFuture<?, ReadFailedException> invoke(TransactionProxy proxy) throws Exception;
     }
 
-    private static ActorSystem system;
-
-    private final Configuration configuration = new MockConfiguration();
-
-    @Mock
-    private ActorContext mockActorContext;
-
-    private SchemaContext schemaContext;
-
-    @Mock
-    private ClusterWrapper mockClusterWrapper;
-
-    private final String memberName = "mock-member";
-
-    private final Builder dataStoreContextBuilder = DatastoreContext.newBuilder().operationTimeoutInSeconds(2).
-            shardBatchedModificationCount(1);
-
-    @BeforeClass
-    public static void setUpClass() throws IOException {
-
-        Config config = ConfigFactory.parseMap(ImmutableMap.<String, Object>builder().
-                put("akka.actor.default-dispatcher.type",
-                        "akka.testkit.CallingThreadDispatcherConfigurator").build()).
-                withFallback(ConfigFactory.load());
-        system = ActorSystem.create("test", config);
-    }
-
-    @AfterClass
-    public static void tearDownClass() throws IOException {
-        JavaTestKit.shutdownActorSystem(system);
-        system = null;
-    }
-
-    @Before
-    public void setUp(){
-        MockitoAnnotations.initMocks(this);
-
-        schemaContext = TestModel.createTestContext();
-
-        doReturn(getSystem()).when(mockActorContext).getActorSystem();
-        doReturn(getSystem().dispatchers().defaultGlobalDispatcher()).when(mockActorContext).getClientDispatcher();
-        doReturn(memberName).when(mockActorContext).getCurrentMemberName();
-        doReturn(schemaContext).when(mockActorContext).getSchemaContext();
-        doReturn(mockClusterWrapper).when(mockActorContext).getClusterWrapper();
-        doReturn(mockClusterWrapper).when(mockActorContext).getClusterWrapper();
-        doReturn(dataStoreContextBuilder.build()).when(mockActorContext).getDatastoreContext();
-        doReturn(10).when(mockActorContext).getTransactionOutstandingOperationLimit();
-
-        ShardStrategyFactory.setConfiguration(configuration);
-    }
-
-    private ActorSystem getSystem() {
-        return system;
-    }
-
-    private CreateTransaction eqCreateTransaction(final String memberName,
-            final TransactionType type) {
-        ArgumentMatcher<CreateTransaction> matcher = new ArgumentMatcher<CreateTransaction>() {
-            @Override
-            public boolean matches(Object argument) {
-                if(CreateTransaction.SERIALIZABLE_CLASS.equals(argument.getClass())) {
-                    CreateTransaction obj = CreateTransaction.fromSerializable(argument);
-                    return obj.getTransactionId().startsWith(memberName) &&
-                            obj.getTransactionType() == type.ordinal();
-                }
-
-                return false;
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private DataExists eqSerializedDataExists() {
-        ArgumentMatcher<DataExists> matcher = new ArgumentMatcher<DataExists>() {
-            @Override
-            public boolean matches(Object argument) {
-                return DataExists.SERIALIZABLE_CLASS.equals(argument.getClass()) &&
-                       DataExists.fromSerializable(argument).getPath().equals(TestModel.TEST_PATH);
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private DataExists eqDataExists() {
-        ArgumentMatcher<DataExists> matcher = new ArgumentMatcher<DataExists>() {
-            @Override
-            public boolean matches(Object argument) {
-                return (argument instanceof DataExists) &&
-                    ((DataExists)argument).getPath().equals(TestModel.TEST_PATH);
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private ReadData eqSerializedReadData() {
-        return eqSerializedReadData(TestModel.TEST_PATH);
-    }
-
-    private ReadData eqSerializedReadData(final YangInstanceIdentifier path) {
-        ArgumentMatcher<ReadData> matcher = new ArgumentMatcher<ReadData>() {
-            @Override
-            public boolean matches(Object argument) {
-                return ReadData.SERIALIZABLE_CLASS.equals(argument.getClass()) &&
-                       ReadData.fromSerializable(argument).getPath().equals(path);
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private ReadData eqReadData() {
-        ArgumentMatcher<ReadData> matcher = new ArgumentMatcher<ReadData>() {
-            @Override
-            public boolean matches(Object argument) {
-                return (argument instanceof ReadData) &&
-                    ((ReadData)argument).getPath().equals(TestModel.TEST_PATH);
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private WriteData eqLegacyWriteData(final NormalizedNode<?, ?> nodeToWrite) {
-        ArgumentMatcher<WriteData> matcher = new ArgumentMatcher<WriteData>() {
-            @Override
-            public boolean matches(Object argument) {
-                if(ShardTransactionMessages.WriteData.class.equals(argument.getClass())) {
-                    WriteData obj = WriteData.fromSerializable(argument);
-                    return obj.getPath().equals(TestModel.TEST_PATH) && obj.getData().equals(nodeToWrite);
-                }
-
-                return false;
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private MergeData eqLegacyMergeData(final NormalizedNode<?, ?> nodeToWrite) {
-        ArgumentMatcher<MergeData> matcher = new ArgumentMatcher<MergeData>() {
-            @Override
-            public boolean matches(Object argument) {
-                if(ShardTransactionMessages.MergeData.class.equals(argument.getClass())) {
-                    MergeData obj = MergeData.fromSerializable(argument);
-                    return obj.getPath().equals(TestModel.TEST_PATH) && obj.getData().equals(nodeToWrite);
-                }
-
-                return false;
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private DeleteData eqLegacyDeleteData(final YangInstanceIdentifier expPath) {
-        ArgumentMatcher<DeleteData> matcher = new ArgumentMatcher<DeleteData>() {
-            @Override
-            public boolean matches(Object argument) {
-                return ShardTransactionMessages.DeleteData.class.equals(argument.getClass()) &&
-                       DeleteData.fromSerializable(argument).getPath().equals(expPath);
-            }
-        };
-
-        return argThat(matcher);
-    }
-
-    private Future<Object> readySerializedTxReply(String path) {
-        return Futures.successful((Object)new ReadyTransactionReply(path).toSerializable());
-    }
-
-    private Future<Object> readyTxReply(String path) {
-        return Futures.successful((Object)new ReadyTransactionReply(path));
-    }
-
-    private Future<Object> readSerializedDataReply(NormalizedNode<?, ?> data,
-            short transactionVersion) {
-        return Futures.successful(new ReadDataReply(data, transactionVersion).toSerializable());
-    }
-
-    private Future<Object> readSerializedDataReply(NormalizedNode<?, ?> data) {
-        return readSerializedDataReply(data, DataStoreVersions.CURRENT_VERSION);
-    }
-
-    private Future<ReadDataReply> readDataReply(NormalizedNode<?, ?> data) {
-        return Futures.successful(new ReadDataReply(data, DataStoreVersions.CURRENT_VERSION));
-    }
-
-    private Future<Object> dataExistsSerializedReply(boolean exists) {
-        return Futures.successful(new DataExistsReply(exists).toSerializable());
-    }
-
-    private Future<DataExistsReply> dataExistsReply(boolean exists) {
-        return Futures.successful(new DataExistsReply(exists));
-    }
-
-    private Future<BatchedModificationsReply> batchedModificationsReply(int count) {
-        return Futures.successful(new BatchedModificationsReply(count));
-    }
-
-    private Future<Object> incompleteFuture(){
-        return mock(Future.class);
-    }
-
-    private ActorSelection actorSelection(ActorRef actorRef) {
-        return getSystem().actorSelection(actorRef.path());
-    }
-
-    private void expectBatchedModifications(ActorRef actorRef, int count) {
-        doReturn(batchedModificationsReply(count)).when(mockActorContext).executeOperationAsync(
-                eq(actorSelection(actorRef)), isA(BatchedModifications.class));
-    }
-
-    private void expectBatchedModifications(int count) {
-        doReturn(batchedModificationsReply(count)).when(mockActorContext).executeOperationAsync(
-                any(ActorSelection.class), isA(BatchedModifications.class));
-    }
-
-    private void expectIncompleteBatchedModifications() {
-        doReturn(incompleteFuture()).when(mockActorContext).executeOperationAsync(
-                any(ActorSelection.class), isA(BatchedModifications.class));
-    }
-
-    private void expectReadyTransaction(ActorRef actorRef) {
-        doReturn(readySerializedTxReply(actorRef.path().toString())).when(mockActorContext).executeOperationAsync(
-                eq(actorSelection(actorRef)), isA(ReadyTransaction.SERIALIZABLE_CLASS));
-    }
-
-    private void expectFailedBatchedModifications(ActorRef actorRef) {
-        doReturn(Futures.failed(new TestException())).when(mockActorContext).executeOperationAsync(
-                eq(actorSelection(actorRef)), isA(BatchedModifications.class));
-    }
-
-    private CreateTransactionReply createTransactionReply(ActorRef actorRef, int transactionVersion){
-        return CreateTransactionReply.newBuilder()
-            .setTransactionActorPath(actorRef.path().toString())
-            .setTransactionId("txn-1")
-            .setMessageVersion(transactionVersion)
-            .build();
-    }
-
-    private ActorRef setupActorContextWithoutInitialCreateTransaction(ActorSystem actorSystem) {
-        ActorRef actorRef = actorSystem.actorOf(Props.create(DoNothingActor.class));
-        doReturn(actorSystem.actorSelection(actorRef.path())).
-                when(mockActorContext).actorSelection(actorRef.path().toString());
-
-        doReturn(Futures.successful(actorSystem.actorSelection(actorRef.path()))).
-                when(mockActorContext).findPrimaryShardAsync(eq(DefaultShardStrategy.DEFAULT_SHARD));
-
-        doReturn(false).when(mockActorContext).isPathLocal(actorRef.path().toString());
-
-        doReturn(10).when(mockActorContext).getTransactionOutstandingOperationLimit();
-
-        return actorRef;
-    }
-
-    private ActorRef setupActorContextWithInitialCreateTransaction(ActorSystem actorSystem,
-            TransactionType type, int transactionVersion) {
-        ActorRef actorRef = setupActorContextWithoutInitialCreateTransaction(actorSystem);
-
-        doReturn(Futures.successful(createTransactionReply(actorRef, transactionVersion))).when(mockActorContext).
-                executeOperationAsync(eq(actorSystem.actorSelection(actorRef.path())),
-                        eqCreateTransaction(memberName, type));
-
-        return actorRef;
-    }
-
-    private ActorRef setupActorContextWithInitialCreateTransaction(ActorSystem actorSystem, TransactionType type) {
-        return setupActorContextWithInitialCreateTransaction(actorSystem, type, DataStoreVersions.CURRENT_VERSION);
-    }
-
-
-    private void propagateReadFailedExceptionCause(CheckedFuture<?, ReadFailedException> future)
-            throws Throwable {
-
-        try {
-            future.checkedGet(5, TimeUnit.SECONDS);
-            fail("Expected ReadFailedException");
-        } catch(ReadFailedException e) {
-            throw e.getCause();
-        }
-    }
-
     @Test
     public void testRead() throws Exception {
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
@@ -705,24 +388,18 @@ public class TransactionProxyTest {
 
     @Test
     public void testWrite() throws Exception {
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
         expectBatchedModifications(actorRef, 1);
-        expectReadyTransaction(actorRef);
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
         transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
 
-        // This sends the batched modification.
-        transactionProxy.ready();
-
-        verifyOneBatchedModification(actorRef, new WriteModification(TestModel.TEST_PATH, nodeToWrite));
-
-        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                BatchedModificationsReply.class);
+        verifyOneBatchedModification(actorRef, new WriteModification(TestModel.TEST_PATH, nodeToWrite), false);
     }
 
     @Test
@@ -777,7 +454,7 @@ public class TransactionProxyTest {
         // This sends the batched modification.
         transactionProxy.ready();
 
-        verifyOneBatchedModification(actorRef, new WriteModification(TestModel.TEST_PATH, nodeToWrite));
+        verifyOneBatchedModification(actorRef, new WriteModification(TestModel.TEST_PATH, nodeToWrite), false);
 
         verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
                 BatchedModificationsReply.class);
@@ -800,73 +477,36 @@ public class TransactionProxyTest {
 
     @Test
     public void testMerge() throws Exception {
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
         expectBatchedModifications(actorRef, 1);
-        expectReadyTransaction(actorRef);
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
         transactionProxy.merge(TestModel.TEST_PATH, nodeToWrite);
 
-        // This sends the batched modification.
-        transactionProxy.ready();
-
-        verifyOneBatchedModification(actorRef, new MergeModification(TestModel.TEST_PATH, nodeToWrite));
-
-        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                BatchedModificationsReply.class);
+        verifyOneBatchedModification(actorRef, new MergeModification(TestModel.TEST_PATH, nodeToWrite), false);
     }
 
     @Test
     public void testDelete() throws Exception {
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
         expectBatchedModifications(actorRef, 1);
-        expectReadyTransaction(actorRef);
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
         transactionProxy.delete(TestModel.TEST_PATH);
 
-        // This sends the batched modification.
-        transactionProxy.ready();
-
-        verifyOneBatchedModification(actorRef, new DeleteModification(TestModel.TEST_PATH));
-
-        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                BatchedModificationsReply.class);
-    }
-
-    private void verifyCohortFutures(ThreePhaseCommitCohortProxy proxy,
-        Object... expReplies) throws Exception {
-        assertEquals("getReadyOperationFutures size", expReplies.length,
-                proxy.getCohortFutures().size());
-
-        int i = 0;
-        for( Future<ActorSelection> future: proxy.getCohortFutures()) {
-            assertNotNull("Ready operation Future is null", future);
-
-            Object expReply = expReplies[i++];
-            if(expReply instanceof ActorSelection) {
-                ActorSelection actual = Await.result(future, Duration.create(5, TimeUnit.SECONDS));
-                assertEquals("Cohort actor path", expReply, actual);
-            } else {
-                // Expecting exception.
-                try {
-                    Await.result(future, Duration.create(5, TimeUnit.SECONDS));
-                    fail("Expected exception from ready operation Future");
-                } catch(Exception e) {
-                    // Expected
-                }
-            }
-        }
+        verifyOneBatchedModification(actorRef, new DeleteModification(TestModel.TEST_PATH), false);
     }
 
     @Test
-    public void testReady() throws Exception {
+    public void testReadyWithReadWrite() throws Exception {
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
@@ -896,44 +536,57 @@ public class TransactionProxyTest {
 
         verify(mockActorContext).executeOperationAsync(eq(actorSelection(actorRef)),
                 isA(BatchedModifications.class));
+
+        verify(mockActorContext).executeOperationAsync(eq(actorSelection(actorRef)),
+                isA(ReadyTransaction.SERIALIZABLE_CLASS));
     }
 
-    private ActorRef testCompatibilityWithHeliumVersion(short version) throws Exception {
-        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(),
-                READ_WRITE, version);
+    @Test
+    public void testReadyWithWriteOnlyAndLastBatchPending() throws Exception {
+        dataStoreContextBuilder.writeOnlyTransactionOptimizationsEnabled(true);
 
-        NormalizedNode<?, ?> testNode = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
-        doReturn(readSerializedDataReply(testNode, version)).when(mockActorContext).executeOperationAsync(
-                eq(actorSelection(actorRef)), eqSerializedReadData());
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
-        doReturn(Futures.successful(new WriteDataReply().toSerializable(version))).when(mockActorContext).
-                executeOperationAsync(eq(actorSelection(actorRef)), eqLegacyWriteData(testNode));
+        expectBatchedModificationsReady(actorRef, 1);
 
-        doReturn(Futures.successful(new MergeDataReply().toSerializable(version))).when(mockActorContext).
-                executeOperationAsync(eq(actorSelection(actorRef)), eqLegacyMergeData(testNode));
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
-        doReturn(Futures.successful(new DeleteDataReply().toSerializable(version))).when(mockActorContext).
-                executeOperationAsync(eq(actorSelection(actorRef)), eqLegacyDeleteData(TestModel.TEST_PATH));
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
 
-        expectReadyTransaction(actorRef);
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
 
-        doReturn(actorRef.path().toString()).when(mockActorContext).resolvePath(eq(actorRef.path().toString()),
-                eq(actorRef.path().toString()));
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
 
-        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, READ_WRITE);
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
-        Optional<NormalizedNode<?, ?>> readOptional = transactionProxy.read(TestModel.TEST_PATH).
-                get(5, TimeUnit.SECONDS);
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures());
 
-        assertEquals("NormalizedNode isPresent", true, readOptional.isPresent());
-        assertEquals("Response NormalizedNode", testNode, readOptional.get());
+        verifyCohortFutures(proxy, getSystem().actorSelection(actorRef.path()));
+
+        List<BatchedModifications> batchedModifications = captureBatchedModifications(actorRef);
+        assertEquals("Captured BatchedModifications count", 1, batchedModifications.size());
 
-        transactionProxy.write(TestModel.TEST_PATH, testNode);
+        verifyBatchedModifications(batchedModifications.get(0), true,
+                new WriteModification(TestModel.TEST_PATH, nodeToWrite));
 
-        transactionProxy.merge(TestModel.TEST_PATH, testNode);
+        verify(mockActorContext, never()).executeOperationAsync(eq(actorSelection(actorRef)),
+                isA(ReadyTransaction.SERIALIZABLE_CLASS));
+    }
 
-        transactionProxy.delete(TestModel.TEST_PATH);
+    @Test
+    public void testReadyWithWriteOnlyAndLastBatchEmpty() throws Exception {
+        dataStoreContextBuilder.shardBatchedModificationCount(1).writeOnlyTransactionOptimizationsEnabled(true);
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        expectBatchedModificationsReady(actorRef, 1);
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
 
         DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
 
@@ -942,40 +595,32 @@ public class TransactionProxyTest {
         ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
         verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                ShardTransactionMessages.WriteDataReply.class, ShardTransactionMessages.MergeDataReply.class,
-                ShardTransactionMessages.DeleteDataReply.class);
+                BatchedModificationsReply.class);
 
         verifyCohortFutures(proxy, getSystem().actorSelection(actorRef.path()));
 
-        return actorRef;
-    }
-
-    @Test
-    public void testCompatibilityWithBaseHeliumVersion() throws Exception {
-        ActorRef actorRef = testCompatibilityWithHeliumVersion(DataStoreVersions.BASE_HELIUM_VERSION);
+        List<BatchedModifications> batchedModifications = captureBatchedModifications(actorRef);
+        assertEquals("Captured BatchedModifications count", 2, batchedModifications.size());
 
-        verify(mockActorContext).resolvePath(eq(actorRef.path().toString()),
-                eq(actorRef.path().toString()));
-    }
+        verifyBatchedModifications(batchedModifications.get(0), false,
+                new WriteModification(TestModel.TEST_PATH, nodeToWrite));
 
-    @Test
-    public void testCompatibilityWithHeliumR1Version() throws Exception {
-        ActorRef actorRef = testCompatibilityWithHeliumVersion(DataStoreVersions.HELIUM_1_VERSION);
+        verifyBatchedModifications(batchedModifications.get(1), true);
 
-        verify(mockActorContext, Mockito.never()).resolvePath(eq(actorRef.path().toString()),
-                eq(actorRef.path().toString()));
+        verify(mockActorContext, never()).executeOperationAsync(eq(actorSelection(actorRef)),
+                isA(ReadyTransaction.SERIALIZABLE_CLASS));
     }
 
     @Test
     public void testReadyWithRecordingOperationFailure() throws Exception {
+        dataStoreContextBuilder.shardBatchedModificationCount(1).writeOnlyTransactionOptimizationsEnabled(true);
+
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
         expectFailedBatchedModifications(actorRef);
 
-        expectReadyTransaction(actorRef);
-
         doReturn(false).when(mockActorContext).isPathLocal(actorRef.path().toString());
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
@@ -995,15 +640,13 @@ public class TransactionProxyTest {
 
     @Test
     public void testReadyWithReplyFailure() throws Exception {
+        dataStoreContextBuilder.writeOnlyTransactionOptimizationsEnabled(true);
+
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
-        expectBatchedModifications(actorRef, 1);
-
-        doReturn(Futures.failed(new TestException())).when(mockActorContext).
-                executeOperationAsync(eq(actorSelection(actorRef)),
-                        isA(ReadyTransaction.SERIALIZABLE_CLASS));
+        expectFailedBatchedModifications(actorRef);
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
@@ -1015,17 +658,11 @@ public class TransactionProxyTest {
 
         ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
-        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                BatchedModificationsReply.class);
-
         verifyCohortFutures(proxy, TestException.class);
     }
 
-    @Test
-    public void testReadyWithInitialCreateTransactionFailure() throws Exception {
-
-        doReturn(Futures.failed(new PrimaryNotFoundException("mock"))).when(
-                mockActorContext).findPrimaryShardAsync(anyString());
+    private void testWriteOnlyTxWithFindPrimaryShardFailure(Exception toThrow) throws Exception {
+        doReturn(Futures.failed(toThrow)).when(mockActorContext).findPrimaryShardAsync(anyString());
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
@@ -1043,20 +680,36 @@ public class TransactionProxyTest {
 
         ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
-        verifyCohortFutures(proxy, PrimaryNotFoundException.class);
+        verifyCohortFutures(proxy, toThrow.getClass());
+    }
+
+    @Test
+    public void testWriteOnlyTxWithPrimaryNotFoundException() throws Exception {
+        testWriteOnlyTxWithFindPrimaryShardFailure(new PrimaryNotFoundException("mock"));
+    }
+
+    @Test
+    public void testWriteOnlyTxWithNotInitializedException() throws Exception {
+        testWriteOnlyTxWithFindPrimaryShardFailure(new NotInitializedException("mock"));
+    }
+
+    @Test
+    public void testWriteOnlyTxWithNoShardLeaderException() throws Exception {
+        testWriteOnlyTxWithFindPrimaryShardFailure(new NoShardLeaderException("mock"));
     }
 
     @Test
     public void testReadyWithInvalidReplyMessageType() throws Exception {
+        dataStoreContextBuilder.writeOnlyTransactionOptimizationsEnabled(true);
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
-        expectBatchedModifications(actorRef, 1);
+        //expectBatchedModifications(actorRef, 1);
 
         doReturn(Futures.successful(new Object())).when(mockActorContext).
                 executeOperationAsync(eq(actorSelection(actorRef)),
-                        isA(ReadyTransaction.SERIALIZABLE_CLASS));
+                        isA(BatchedModifications.class));
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
 
@@ -1114,24 +767,8 @@ public class TransactionProxyTest {
      */
     @Test
     public void testLocalTxActorRead() throws Exception {
-        ActorSystem actorSystem = getSystem();
-        ActorRef shardActorRef = actorSystem.actorOf(Props.create(DoNothingActor.class));
-
-        doReturn(actorSystem.actorSelection(shardActorRef.path())).
-            when(mockActorContext).actorSelection(shardActorRef.path().toString());
-
-        doReturn(Futures.successful(actorSystem.actorSelection(shardActorRef.path()))).
-            when(mockActorContext).findPrimaryShardAsync(eq(DefaultShardStrategy.DEFAULT_SHARD));
-
-        String actorPath = "akka.tcp://system@127.0.0.1:2550/user/tx-actor";
-        CreateTransactionReply createTransactionReply = CreateTransactionReply.newBuilder()
-            .setTransactionId("txn-1").setTransactionActorPath(actorPath).build();
-
-        doReturn(Futures.successful(createTransactionReply)).when(mockActorContext).
-            executeOperationAsync(eq(actorSystem.actorSelection(shardActorRef.path())),
-                eqCreateTransaction(memberName, READ_ONLY));
-
-        doReturn(true).when(mockActorContext).isPathLocal(actorPath);
+        setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
+        doReturn(true).when(mockActorContext).isPathLocal(anyString());
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,READ_ONLY);
 
@@ -1167,40 +804,20 @@ public class TransactionProxyTest {
 
     @Test
     public void testLocalTxActorReady() throws Exception {
-        ActorSystem actorSystem = getSystem();
-        ActorRef shardActorRef = actorSystem.actorOf(Props.create(DoNothingActor.class));
-
-        doReturn(actorSystem.actorSelection(shardActorRef.path())).
-            when(mockActorContext).actorSelection(shardActorRef.path().toString());
-
-        doReturn(Futures.successful(actorSystem.actorSelection(shardActorRef.path()))).
-            when(mockActorContext).findPrimaryShardAsync(eq(DefaultShardStrategy.DEFAULT_SHARD));
-
-        String actorPath = "akka.tcp://system@127.0.0.1:2550/user/tx-actor";
-        CreateTransactionReply createTransactionReply = CreateTransactionReply.newBuilder().
-            setTransactionId("txn-1").setTransactionActorPath(actorPath).
-            setMessageVersion(DataStoreVersions.CURRENT_VERSION).build();
-
-        doReturn(Futures.successful(createTransactionReply)).when(mockActorContext).
-            executeOperationAsync(eq(actorSystem.actorSelection(shardActorRef.path())),
-                eqCreateTransaction(memberName, WRITE_ONLY));
-
-        doReturn(true).when(mockActorContext).isPathLocal(actorPath);
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
+        doReturn(true).when(mockActorContext).isPathLocal(anyString());
 
         doReturn(batchedModificationsReply(1)).when(mockActorContext).executeOperationAsync(
                 any(ActorSelection.class), isA(BatchedModifications.class));
 
-        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, READ_WRITE);
 
         NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
         transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
 
-        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                BatchedModificationsReply.class);
-
         // testing ready
-        doReturn(readyTxReply(shardActorRef.path().toString())).when(mockActorContext).executeOperationAsync(
-            any(ActorSelection.class), isA(ReadyTransaction.class));
+        doReturn(readyTxReply(actorRef.path().toString())).when(mockActorContext).executeOperationAsync(
+            eq(actorSelection(actorRef)), isA(ReadyTransaction.class));
 
         DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
 
@@ -1208,7 +825,7 @@ public class TransactionProxyTest {
 
         ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
-        verifyCohortFutures(proxy, getSystem().actorSelection(shardActorRef.path()));
+        verifyCohortFutures(proxy, getSystem().actorSelection(actorRef.path()));
     }
 
     private static interface TransactionProxyOperation {
@@ -1278,20 +895,23 @@ public class TransactionProxyTest {
             doReturn(Futures.successful(actorSystem.actorSelection(shardActorRef.path()))).
                     when(mockActorContext).findPrimaryShardAsync(eq(DefaultShardStrategy.DEFAULT_SHARD));
         } else {
-            doReturn(Futures.failed(new Exception("not found")))
+            doReturn(Futures.failed(new PrimaryNotFoundException("test")))
                     .when(mockActorContext).findPrimaryShardAsync(eq(DefaultShardStrategy.DEFAULT_SHARD));
         }
 
-        String actorPath = "akka.tcp://system@127.0.0.1:2550/user/tx-actor";
+        ActorRef txActorRef = actorSystem.actorOf(Props.create(DoNothingActor.class));
+        String actorPath = txActorRef.path().toString();
         CreateTransactionReply createTransactionReply = CreateTransactionReply.newBuilder().
                 setTransactionId("txn-1").setTransactionActorPath(actorPath).
                 setMessageVersion(DataStoreVersions.CURRENT_VERSION).build();
 
+        doReturn(actorSystem.actorSelection(actorPath)).when(mockActorContext).actorSelection(actorPath);
+
         doReturn(Futures.successful(createTransactionReply)).when(mockActorContext).
                 executeOperationAsync(eq(actorSystem.actorSelection(shardActorRef.path())),
                         eqCreateTransaction(memberName, READ_WRITE));
 
-        doReturn(true).when(mockActorContext).isPathLocal(actorPath);
+        doReturn(true).when(mockActorContext).isPathLocal(anyString());
 
         TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, READ_WRITE);
 
@@ -1324,6 +944,7 @@ public class TransactionProxyTest {
 
     @Test
     public void testWriteThrottlingWhenShardFound(){
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         throttleOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1341,6 +962,7 @@ public class TransactionProxyTest {
     @Test
     public void testWriteThrottlingWhenShardNotFound(){
         // Confirm that there is no throttling when the Shard is not found
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         completeOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1359,6 +981,7 @@ public class TransactionProxyTest {
 
     @Test
     public void testWriteCompletion(){
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         completeOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1375,7 +998,7 @@ public class TransactionProxyTest {
 
     @Test
     public void testMergeThrottlingWhenShardFound(){
-
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         throttleOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1392,7 +1015,7 @@ public class TransactionProxyTest {
 
     @Test
     public void testMergeThrottlingWhenShardNotFound(){
-
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         completeOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1409,6 +1032,7 @@ public class TransactionProxyTest {
 
     @Test
     public void testMergeCompletion(){
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         completeOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1457,6 +1081,7 @@ public class TransactionProxyTest {
 
     @Test
     public void testDeleteCompletion(){
+        dataStoreContextBuilder.shardBatchedModificationCount(1);
         completeOperation(new TransactionProxyOperation() {
             @Override
             public void run(TransactionProxy transactionProxy) {
@@ -1613,13 +1238,11 @@ public class TransactionProxyTest {
         }, 2, true);
     }
 
-    @Test
-    public void testModificationOperationBatching() throws Throwable {
+    private void testModificationOperationBatching(TransactionType type) throws Exception {
         int shardBatchedModificationCount = 3;
-        doReturn(dataStoreContextBuilder.shardBatchedModificationCount(shardBatchedModificationCount).build()).
-                when(mockActorContext).getDatastoreContext();
+        dataStoreContextBuilder.shardBatchedModificationCount(shardBatchedModificationCount);
 
-        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), type);
 
         expectBatchedModifications(actorRef, shardBatchedModificationCount);
 
@@ -1646,7 +1269,7 @@ public class TransactionProxyTest {
         YangInstanceIdentifier deletePath1 = TestModel.TEST_PATH;
         YangInstanceIdentifier deletePath2 = TestModel.OUTER_LIST_PATH;
 
-        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, READ_WRITE);
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, type);
 
         transactionProxy.write(writePath1, writeNode1);
         transactionProxy.write(writePath2, writeNode2);
@@ -1663,24 +1286,46 @@ public class TransactionProxyTest {
         List<BatchedModifications> batchedModifications = captureBatchedModifications(actorRef);
         assertEquals("Captured BatchedModifications count", 3, batchedModifications.size());
 
-        verifyBatchedModifications(batchedModifications.get(0), new WriteModification(writePath1, writeNode1),
+        verifyBatchedModifications(batchedModifications.get(0), false, new WriteModification(writePath1, writeNode1),
                 new WriteModification(writePath2, writeNode2), new DeleteModification(deletePath1));
 
-        verifyBatchedModifications(batchedModifications.get(1), new MergeModification(mergePath1, mergeNode1),
+        verifyBatchedModifications(batchedModifications.get(1), false, new MergeModification(mergePath1, mergeNode1),
                 new MergeModification(mergePath2, mergeNode2), new WriteModification(writePath3, writeNode3));
 
-        verifyBatchedModifications(batchedModifications.get(2), new MergeModification(mergePath3, mergeNode3),
+        boolean optimizedWriteOnly = type == WRITE_ONLY && dataStoreContextBuilder.build().isWriteOnlyTransactionOptimizationsEnabled();
+        verifyBatchedModifications(batchedModifications.get(2), optimizedWriteOnly, new MergeModification(mergePath3, mergeNode3),
                 new DeleteModification(deletePath2));
 
-        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
-                BatchedModificationsReply.class, BatchedModificationsReply.class, BatchedModificationsReply.class);
+        if(optimizedWriteOnly) {
+            verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                    BatchedModificationsReply.class, BatchedModificationsReply.class);
+        } else {
+            verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                    BatchedModificationsReply.class, BatchedModificationsReply.class, BatchedModificationsReply.class);
+        }
+    }
+
+    @Test
+    public void testReadWriteModificationOperationBatching() throws Throwable {
+        testModificationOperationBatching(READ_WRITE);
+    }
+
+    @Test
+    public void testWriteOnlyModificationOperationBatching() throws Throwable {
+        testModificationOperationBatching(WRITE_ONLY);
+    }
+
+    @Test
+    public void testOptimizedWriteOnlyModificationOperationBatching() throws Throwable {
+        dataStoreContextBuilder.writeOnlyTransactionOptimizationsEnabled(true);
+        testModificationOperationBatching(WRITE_ONLY);
     }
 
     @Test
     public void testModificationOperationBatchingWithInterleavedReads() throws Throwable {
+
         int shardBatchedModificationCount = 10;
-        doReturn(dataStoreContextBuilder.shardBatchedModificationCount(shardBatchedModificationCount).build()).
-                when(mockActorContext).getDatastoreContext();
+        dataStoreContextBuilder.shardBatchedModificationCount(shardBatchedModificationCount);
 
         ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
 
@@ -1736,13 +1381,13 @@ public class TransactionProxyTest {
         List<BatchedModifications> batchedModifications = captureBatchedModifications(actorRef);
         assertEquals("Captured BatchedModifications count", 3, batchedModifications.size());
 
-        verifyBatchedModifications(batchedModifications.get(0), new WriteModification(writePath1, writeNode1),
+        verifyBatchedModifications(batchedModifications.get(0), false, new WriteModification(writePath1, writeNode1),
                 new WriteModification(writePath2, writeNode2));
 
-        verifyBatchedModifications(batchedModifications.get(1), new MergeModification(mergePath1, mergeNode1),
+        verifyBatchedModifications(batchedModifications.get(1), false, new MergeModification(mergePath1, mergeNode1),
                 new MergeModification(mergePath2, mergeNode2));
 
-        verifyBatchedModifications(batchedModifications.get(2), new DeleteModification(deletePath));
+        verifyBatchedModifications(batchedModifications.get(2), false, new DeleteModification(deletePath));
 
         InOrder inOrder = Mockito.inOrder(mockActorContext);
         inOrder.verify(mockActorContext).executeOperationAsync(
@@ -1766,49 +1411,4 @@ public class TransactionProxyTest {
         verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
                 BatchedModificationsReply.class, BatchedModificationsReply.class, BatchedModificationsReply.class);
     }
-
-    private List<BatchedModifications> captureBatchedModifications(ActorRef actorRef) {
-        ArgumentCaptor<BatchedModifications> batchedModificationsCaptor =
-                ArgumentCaptor.forClass(BatchedModifications.class);
-        verify(mockActorContext, Mockito.atLeastOnce()).executeOperationAsync(
-                eq(actorSelection(actorRef)), batchedModificationsCaptor.capture());
-
-        List<BatchedModifications> batchedModifications = filterCaptured(
-                batchedModificationsCaptor, BatchedModifications.class);
-        return batchedModifications;
-    }
-
-    private <T> List<T> filterCaptured(ArgumentCaptor<T> captor, Class<T> type) {
-        List<T> captured = new ArrayList<>();
-        for(T c: captor.getAllValues()) {
-            if(type.isInstance(c)) {
-                captured.add(c);
-            }
-        }
-
-        return captured;
-    }
-
-    private void verifyOneBatchedModification(ActorRef actorRef, Modification expected) {
-        List<BatchedModifications> batchedModifications = captureBatchedModifications(actorRef);
-        assertEquals("Captured BatchedModifications count", 1, batchedModifications.size());
-
-        verifyBatchedModifications(batchedModifications.get(0), expected);
-    }
-
-    private void verifyBatchedModifications(Object message, Modification... expected) {
-        assertEquals("Message type", BatchedModifications.class, message.getClass());
-        BatchedModifications batchedModifications = (BatchedModifications)message;
-        assertEquals("BatchedModifications size", expected.length, batchedModifications.getModifications().size());
-        for(int i = 0; i < batchedModifications.getModifications().size(); i++) {
-            Modification actual = batchedModifications.getModifications().get(i);
-            assertEquals("Modification type", expected[i].getClass(), actual.getClass());
-            assertEquals("getPath", ((AbstractModification)expected[i]).getPath(),
-                    ((AbstractModification)actual).getPath());
-            if(actual instanceof WriteModification) {
-                assertEquals("getData", ((WriteModification)expected[i]).getData(),
-                        ((WriteModification)actual).getData());
-            }
-        }
-    }
 }