Fix test case mis-spelling.
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / test / java / org / opendaylight / controller / cluster / datastore / TransactionProxyTest.java
index f654e3aced738ef0c85a6400babe901d9c98d3ea..7407897dfac504872e37d35c374397369a8c5576 100644 (file)
 package org.opendaylight.controller.cluster.datastore;
 
 import akka.actor.ActorRef;
+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.util.concurrent.ListenableFuture;
-import junit.framework.Assert;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.util.concurrent.CheckedFuture;
+import com.typesafe.config.Config;
+import com.typesafe.config.ConfigFactory;
+import org.junit.AfterClass;
 import org.junit.Before;
+import org.junit.BeforeClass;
 import org.junit.Test;
+import org.mockito.ArgumentMatcher;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.opendaylight.controller.cluster.datastore.TransactionProxy.TransactionType;
+import org.opendaylight.controller.cluster.datastore.exceptions.PrimaryNotFoundException;
+import org.opendaylight.controller.cluster.datastore.exceptions.TimeoutException;
 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.PrimaryFound;
+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.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.MessageCollectorActor;
-import org.opendaylight.controller.cluster.datastore.utils.MockActorContext;
-import org.opendaylight.controller.cluster.datastore.utils.MockClusterWrapper;
 import org.opendaylight.controller.cluster.datastore.utils.MockConfiguration;
 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.CreateTransactionReply;
 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
 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.duration.Duration;
+import java.io.IOException;
 import java.util.List;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+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.Mockito.argThat;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.isA;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.opendaylight.controller.cluster.datastore.TransactionProxy.TransactionType.READ_ONLY;
+import static org.opendaylight.controller.cluster.datastore.TransactionProxy.TransactionType.READ_WRITE;
+import static org.opendaylight.controller.cluster.datastore.TransactionProxy.TransactionType.WRITE_ONLY;
+
+@SuppressWarnings("resource")
+public class TransactionProxyTest {
+
+    @SuppressWarnings("serial")
+    static class TestException extends RuntimeException {
+    }
 
-public class TransactionProxyTest extends AbstractActorTest {
+    static interface Invoker {
+        CheckedFuture<?, ReadFailedException> invoke(TransactionProxy proxy) throws Exception;
+    }
+
+    private static ActorSystem system;
 
     private final Configuration configuration = new MockConfiguration();
 
-    private final ActorContext testContext =
-        new ActorContext(getSystem(), getSystem().actorOf(Props.create(DoNothingActor.class)), new MockClusterWrapper(), configuration );
+    @Mock
+    private ActorContext mockActorContext;
+
+    private SchemaContext schemaContext;
+
+    @Mock
+    private ClusterWrapper mockClusterWrapper;
+
+    String memberName = "mock-member";
+
+    @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);
+    }
 
-    private ExecutorService transactionExecutor =
-        Executors.newSingleThreadExecutor();
+    @AfterClass
+    public static void tearDownClass() throws IOException {
+        JavaTestKit.shutdownActorSystem(system);
+        system = null;
+    }
 
     @Before
     public void setUp(){
+        MockitoAnnotations.initMocks(this);
+
+        schemaContext = TestModel.createTestContext();
+
+        DatastoreContext dataStoreContext = DatastoreContext.newBuilder().build();
+
+        doReturn(getSystem()).when(mockActorContext).getActorSystem();
+        doReturn(memberName).when(mockActorContext).getCurrentMemberName();
+        doReturn(schemaContext).when(mockActorContext).getSchemaContext();
+        doReturn(mockClusterWrapper).when(mockActorContext).getClusterWrapper();
+        doReturn(mockClusterWrapper).when(mockActorContext).getClusterWrapper();
+        doReturn(dataStoreContext).when(mockActorContext).getDatastoreContext();
+
         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) {
+                CreateTransaction obj = CreateTransaction.fromSerializable(argument);
+                return obj.getTransactionId().startsWith(memberName) &&
+                       obj.getTransactionType() == type.ordinal();
+            }
+        };
+
+        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() {
+        ArgumentMatcher<ReadData> matcher = new ArgumentMatcher<ReadData>() {
+            @Override
+            public boolean matches(Object argument) {
+                return ReadData.SERIALIZABLE_CLASS.equals(argument.getClass()) &&
+                       ReadData.fromSerializable(argument).getPath().equals(TestModel.TEST_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 eqSerializedWriteData(final NormalizedNode<?, ?> nodeToWrite) {
+        ArgumentMatcher<WriteData> matcher = new ArgumentMatcher<WriteData>() {
+            @Override
+            public boolean matches(Object argument) {
+                if(!WriteData.SERIALIZABLE_CLASS.equals(argument.getClass())) {
+                    return false;
+                }
+
+                WriteData obj = WriteData.fromSerializable(argument, schemaContext);
+                return obj.getPath().equals(TestModel.TEST_PATH) &&
+                       obj.getData().equals(nodeToWrite);
+            }
+        };
+
+        return argThat(matcher);
+    }
+
+    private WriteData eqWriteData(final NormalizedNode<?, ?> nodeToWrite) {
+        ArgumentMatcher<WriteData> matcher = new ArgumentMatcher<WriteData>() {
+            @Override
+            public boolean matches(Object argument) {
+                if(argument instanceof WriteData) {
+                    WriteData obj = (WriteData) argument;
+                    return obj.getPath().equals(TestModel.TEST_PATH) &&
+                        obj.getData().equals(nodeToWrite);
+                }
+                return false;
+            }
+        };
+
+        return argThat(matcher);
+    }
+
+    private MergeData eqSerializedMergeData(final NormalizedNode<?, ?> nodeToWrite) {
+        ArgumentMatcher<MergeData> matcher = new ArgumentMatcher<MergeData>() {
+            @Override
+            public boolean matches(Object argument) {
+                if(!MergeData.SERIALIZABLE_CLASS.equals(argument.getClass())) {
+                    return false;
+                }
+
+                MergeData obj = MergeData.fromSerializable(argument, schemaContext);
+                return obj.getPath().equals(TestModel.TEST_PATH) &&
+                       obj.getData().equals(nodeToWrite);
+            }
+        };
+
+        return argThat(matcher);
+    }
+
+    private MergeData eqMergeData(final NormalizedNode<?, ?> nodeToWrite) {
+        ArgumentMatcher<MergeData> matcher = new ArgumentMatcher<MergeData>() {
+            @Override
+            public boolean matches(Object argument) {
+                if(argument instanceof MergeData) {
+                    MergeData obj = ((MergeData) argument);
+                    return obj.getPath().equals(TestModel.TEST_PATH) &&
+                        obj.getData().equals(nodeToWrite);
+                }
+
+               return false;
+            }
+        };
+
+        return argThat(matcher);
+    }
+
+    private DeleteData eqSerializedDeleteData() {
+        ArgumentMatcher<DeleteData> matcher = new ArgumentMatcher<DeleteData>() {
+            @Override
+            public boolean matches(Object argument) {
+                return DeleteData.SERIALIZABLE_CLASS.equals(argument.getClass()) &&
+                       DeleteData.fromSerializable(argument).getPath().equals(TestModel.TEST_PATH);
+            }
+        };
+
+        return argThat(matcher);
+    }
+
+        private DeleteData eqDeleteData() {
+        ArgumentMatcher<DeleteData> matcher = new ArgumentMatcher<DeleteData>() {
+            @Override
+            public boolean matches(Object argument) {
+                return argument instanceof DeleteData &&
+                    ((DeleteData)argument).getPath().equals(TestModel.TEST_PATH);
+            }
+        };
+
+        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) {
+        return Futures.successful(new ReadDataReply(schemaContext, data).toSerializable());
+    }
+
+    private Future<ReadDataReply> readDataReply(NormalizedNode<?, ?> data) {
+        return Futures.successful(new ReadDataReply(schemaContext, data));
+    }
+
+    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<Object> writeSerializedDataReply() {
+        return Futures.successful(new WriteDataReply().toSerializable());
+    }
+
+    private Future<WriteDataReply> writeDataReply() {
+        return Futures.successful(new WriteDataReply());
+    }
+
+    private Future<Object> mergeSerializedDataReply() {
+        return Futures.successful(new MergeDataReply().toSerializable());
+    }
+
+    private Future<MergeDataReply> mergeDataReply() {
+        return Futures.successful(new MergeDataReply());
+    }
+
+    private Future<Object> deleteSerializedDataReply() {
+        return Futures.successful(new DeleteDataReply().toSerializable());
+    }
+
+    private Future<DeleteDataReply> deleteDataReply() {
+        return Futures.successful(new DeleteDataReply());
+    }
+
+    private ActorSelection actorSelection(ActorRef actorRef) {
+        return getSystem().actorSelection(actorRef.path());
+    }
+
+    private CreateTransactionReply createTransactionReply(ActorRef actorRef, int transactionVersion){
+        return CreateTransactionReply.newBuilder()
+            .setTransactionActorPath(actorRef.path().toString())
+            .setTransactionId("txn-1")
+            .setMessageVersion(transactionVersion)
+            .build();
+    }
+
+    private ActorRef setupActorContextWithInitialCreateTransaction(ActorSystem actorSystem, TransactionType type, int transactionVersion) {
+        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(Futures.successful(createTransactionReply(actorRef, transactionVersion))).when(mockActorContext).
+                executeOperationAsync(eq(actorSystem.actorSelection(actorRef.path())),
+                        eqCreateTransaction(memberName, type));
+
+        doReturn(false).when(mockActorContext).isPathLocal(actorRef.path().toString());
+
+        return actorRef;
+    }
+
+    private ActorRef setupActorContextWithInitialCreateTransaction(ActorSystem actorSystem, TransactionType type) {
+        return setupActorContextWithInitialCreateTransaction(actorSystem, type, CreateTransaction.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 {
-        final Props props = Props.create(DoNothingActor.class);
-        final ActorRef actorRef = getSystem().actorOf(props);
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
+
+        doReturn(readSerializedDataReply(null)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        Optional<NormalizedNode<?, ?>> readOptional = transactionProxy.read(
+                TestModel.TEST_PATH).get(5, TimeUnit.SECONDS);
+
+        assertEquals("NormalizedNode isPresent", false, readOptional.isPresent());
+
+        NormalizedNode<?, ?> expectedNode = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(readSerializedDataReply(expectedNode)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        readOptional = transactionProxy.read(TestModel.TEST_PATH).get(5, TimeUnit.SECONDS);
+
+        assertEquals("NormalizedNode isPresent", true, readOptional.isPresent());
+
+        assertEquals("Response NormalizedNode", expectedNode, readOptional.get());
+    }
+
+    @Test(expected = ReadFailedException.class)
+    public void testReadWithInvalidReplyMessageType() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
+
+        doReturn(Futures.successful(new Object())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
+
+        transactionProxy.read(TestModel.TEST_PATH).checkedGet(5, TimeUnit.SECONDS);
+    }
+
+    @Test(expected = TestException.class)
+    public void testReadWithAsyncRemoteOperatonFailure() throws Throwable {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
+
+        doReturn(Futures.failed(new TestException())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
+
+        propagateReadFailedExceptionCause(transactionProxy.read(TestModel.TEST_PATH));
+    }
+
+    private void testExceptionOnInitialCreateTransaction(Exception exToThrow, Invoker invoker)
+            throws Throwable {
+        ActorRef actorRef = getSystem().actorOf(Props.create(DoNothingActor.class));
+
+        if (exToThrow instanceof PrimaryNotFoundException) {
+            doReturn(Futures.failed(exToThrow)).when(mockActorContext).findPrimaryShardAsync(anyString());
+        } else {
+            doReturn(Futures.successful(getSystem().actorSelection(actorRef.path()))).
+                    when(mockActorContext).findPrimaryShardAsync(anyString());
+        }
+
+        doReturn(Futures.failed(exToThrow)).when(mockActorContext).executeOperationAsync(
+                any(ActorSelection.class), any());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, READ_ONLY);
+
+        propagateReadFailedExceptionCause(invoker.invoke(transactionProxy));
+    }
+
+    private void testReadWithExceptionOnInitialCreateTransaction(Exception exToThrow) throws Throwable {
+        testExceptionOnInitialCreateTransaction(exToThrow, new Invoker() {
+            @Override
+            public CheckedFuture<?, ReadFailedException> invoke(TransactionProxy proxy) throws Exception {
+                return proxy.read(TestModel.TEST_PATH);
+            }
+        });
+    }
+
+    @Test(expected = PrimaryNotFoundException.class)
+    public void testReadWhenAPrimaryNotFoundExceptionIsThrown() throws Throwable {
+        testReadWithExceptionOnInitialCreateTransaction(new PrimaryNotFoundException("test"));
+    }
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(actorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(actorRef));
-        actorContext.setExecuteRemoteOperationResponse("message");
+    @Test(expected = TimeoutException.class)
+    public void testReadWhenATimeoutExceptionIsThrown() throws Throwable {
+        testReadWithExceptionOnInitialCreateTransaction(new TimeoutException("test",
+                new Exception("reason")));
+    }
 
+    @Test(expected = TestException.class)
+    public void testReadWhenAnyOtherExceptionIsThrown() throws Throwable {
+        testReadWithExceptionOnInitialCreateTransaction(new TestException());
+    }
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+    @Test(expected = TestException.class)
+    public void testReadWithPriorRecordingOperationFailure() throws Throwable {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
 
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
-        ListenableFuture<Optional<NormalizedNode<?, ?>>> read =
-            transactionProxy.read(TestModel.TEST_PATH);
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
 
-        Optional<NormalizedNode<?, ?>> normalizedNodeOptional = read.get();
+        doReturn(Futures.failed(new TestException())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedDeleteData());
 
-        Assert.assertFalse(normalizedNodeOptional.isPresent());
+        doReturn(readSerializedDataReply(null)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
 
-        actorContext.setExecuteRemoteOperationResponse(new ReadDataReply(
-            TestModel.createTestContext(),ImmutableNodes.containerNode(TestModel.TEST_QNAME)).toSerializable());
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
 
-        read = transactionProxy.read(TestModel.TEST_PATH);
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
 
-        normalizedNodeOptional = read.get();
+        transactionProxy.delete(TestModel.TEST_PATH);
 
-        Assert.assertTrue(normalizedNodeOptional.isPresent());
+        try {
+            propagateReadFailedExceptionCause(transactionProxy.read(TestModel.TEST_PATH));
+        } finally {
+            verify(mockActorContext, times(0)).executeOperationAsync(
+                    eq(actorSelection(actorRef)), eqSerializedReadData());
+        }
     }
 
     @Test
-    public void testReadWhenANullIsReturned() throws Exception {
-        final Props props = Props.create(DoNothingActor.class);
-        final ActorRef actorRef = getSystem().actorOf(props);
+    public void testReadWithPriorRecordingOperationSuccessful() throws Throwable {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
+
+        NormalizedNode<?, ?> expectedNode = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(expectedNode));
+
+        doReturn(readSerializedDataReply(expectedNode)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
+
+        transactionProxy.write(TestModel.TEST_PATH, expectedNode);
+
+        Optional<NormalizedNode<?, ?>> readOptional = transactionProxy.read(
+                TestModel.TEST_PATH).get(5, TimeUnit.SECONDS);
+
+        assertEquals("NormalizedNode isPresent", true, readOptional.isPresent());
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(actorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(actorRef));
-        actorContext.setExecuteRemoteOperationResponse("message");
+        assertEquals("Response NormalizedNode", expectedNode, readOptional.get());
+    }
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+    @Test(expected=IllegalStateException.class)
+    public void testReadPreConditionCheck() {
 
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
 
-        ListenableFuture<Optional<NormalizedNode<?, ?>>> read =
-            transactionProxy.read(TestModel.TEST_PATH);
+        transactionProxy.read(TestModel.TEST_PATH);
+    }
 
-        Optional<NormalizedNode<?, ?>> normalizedNodeOptional = read.get();
+    @Test(expected=IllegalArgumentException.class)
+    public void testInvalidCreateTransactionReply() throws Throwable {
+        ActorRef actorRef = getSystem().actorOf(Props.create(DoNothingActor.class));
 
-        Assert.assertFalse(normalizedNodeOptional.isPresent());
+        doReturn(getSystem().actorSelection(actorRef.path())).when(mockActorContext).
+            actorSelection(actorRef.path().toString());
 
-        actorContext.setExecuteRemoteOperationResponse(new ReadDataReply(
-           TestModel.createTestContext(), null).toSerializable());
+        doReturn(Futures.successful(getSystem().actorSelection(actorRef.path()))).
+            when(mockActorContext).findPrimaryShardAsync(eq(DefaultShardStrategy.DEFAULT_SHARD));
 
-        read = transactionProxy.read(TestModel.TEST_PATH);
+        doReturn(Futures.successful(new Object())).when(mockActorContext).executeOperationAsync(
+            eq(getSystem().actorSelection(actorRef.path())), eqCreateTransaction(memberName, READ_ONLY));
 
-        normalizedNodeOptional = read.get();
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, READ_ONLY);
 
-        Assert.assertFalse(normalizedNodeOptional.isPresent());
+        propagateReadFailedExceptionCause(transactionProxy.read(TestModel.TEST_PATH));
     }
 
     @Test
-    public void testWrite() throws Exception {
-        final Props props = Props.create(MessageCollectorActor.class);
-        final ActorRef actorRef = getSystem().actorOf(props);
+    public void testExists() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(actorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(actorRef));
-        actorContext.setExecuteRemoteOperationResponse("message");
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+        doReturn(dataExistsSerializedReply(false)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedDataExists());
 
-        transactionProxy.write(TestModel.TEST_PATH,
-            ImmutableNodes.containerNode(TestModel.NAME_QNAME));
+        Boolean exists = transactionProxy.exists(TestModel.TEST_PATH).checkedGet();
+
+        assertEquals("Exists response", false, exists);
+
+        doReturn(dataExistsSerializedReply(true)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedDataExists());
+
+        exists = transactionProxy.exists(TestModel.TEST_PATH).checkedGet();
+
+        assertEquals("Exists response", true, exists);
+    }
 
-        Object messages = testContext
-            .executeLocalOperation(actorRef, "messages",
-                ActorContext.ASK_DURATION);
+    @Test(expected = PrimaryNotFoundException.class)
+    public void testExistsWhenAPrimaryNotFoundExceptionIsThrown() throws Throwable {
+        testExceptionOnInitialCreateTransaction(new PrimaryNotFoundException("test"), new Invoker() {
+            @Override
+            public CheckedFuture<?, ReadFailedException> invoke(TransactionProxy proxy) throws Exception {
+                return proxy.exists(TestModel.TEST_PATH);
+            }
+        });
+    }
+
+    @Test(expected = ReadFailedException.class)
+    public void testExistsWithInvalidReplyMessageType() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
+
+        doReturn(Futures.successful(new Object())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedDataExists());
 
-        Assert.assertNotNull(messages);
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
+
+        transactionProxy.exists(TestModel.TEST_PATH).checkedGet(5, TimeUnit.SECONDS);
+    }
 
-        Assert.assertTrue(messages instanceof List);
+    @Test(expected = TestException.class)
+    public void testExistsWithAsyncRemoteOperatonFailure() throws Throwable {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
 
-        List<Object> listMessages = (List<Object>) messages;
+        doReturn(Futures.failed(new TestException())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedDataExists());
 
-        Assert.assertEquals(1, listMessages.size());
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
 
-        Assert.assertEquals(WriteData.SERIALIZABLE_CLASS, listMessages.get(0).getClass());
+        propagateReadFailedExceptionCause(transactionProxy.exists(TestModel.TEST_PATH));
     }
 
-    private Object createPrimaryFound(ActorRef actorRef) {
-        return new PrimaryFound(actorRef.path().toString()).toSerializable();
+    @Test(expected = TestException.class)
+    public void testExistsWithPriorRecordingOperationFailure() throws Throwable {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
+
+        doReturn(Futures.failed(new TestException())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedDeleteData());
+
+        doReturn(dataExistsSerializedReply(false)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedDataExists());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        transactionProxy.delete(TestModel.TEST_PATH);
+
+        try {
+            propagateReadFailedExceptionCause(transactionProxy.exists(TestModel.TEST_PATH));
+        } finally {
+            verify(mockActorContext, times(0)).executeOperationAsync(
+                    eq(actorSelection(actorRef)), eqSerializedDataExists());
+        }
     }
 
     @Test
-    public void testMerge() throws Exception {
-        final Props props = Props.create(MessageCollectorActor.class);
-        final ActorRef actorRef = getSystem().actorOf(props);
+    public void testExistsWithPriorRecordingOperationSuccessful() throws Throwable {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(actorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(actorRef));
-        actorContext.setExecuteRemoteOperationResponse("message");
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
 
-        transactionProxy.merge(TestModel.TEST_PATH,
-            ImmutableNodes.containerNode(TestModel.NAME_QNAME));
+        doReturn(dataExistsSerializedReply(true)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedDataExists());
 
-        Object messages = testContext
-            .executeLocalOperation(actorRef, "messages",
-                ActorContext.ASK_DURATION);
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
 
-        Assert.assertNotNull(messages);
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
 
-        Assert.assertTrue(messages instanceof List);
+        Boolean exists = transactionProxy.exists(TestModel.TEST_PATH).checkedGet();
 
-        List<Object> listMessages = (List<Object>) messages;
+        assertEquals("Exists response", true, exists);
+    }
+
+    @Test(expected=IllegalStateException.class)
+    public void testExistsPreConditionCheck() {
 
-        Assert.assertEquals(1, listMessages.size());
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
 
-        Assert.assertEquals(MergeData.SERIALIZABLE_CLASS, listMessages.get(0).getClass());
+        transactionProxy.exists(TestModel.TEST_PATH);
+    }
+
+    private void verifyRecordingOperationFutures(List<Future<Object>> futures,
+            Class<?>... expResultTypes) throws Exception {
+        assertEquals("getRecordingOperationFutures size", expResultTypes.length, futures.size());
+
+        int i = 0;
+        for( Future<Object> future: futures) {
+            assertNotNull("Recording operation Future is null", future);
+
+            Class<?> expResultType = expResultTypes[i++];
+            if(Throwable.class.isAssignableFrom(expResultType)) {
+                try {
+                    Await.result(future, Duration.create(5, TimeUnit.SECONDS));
+                    fail("Expected exception from recording operation Future");
+                } catch(Exception e) {
+                    // Expected
+                }
+            } else {
+                assertEquals("Recording operation Future result type", expResultType,
+                             Await.result(future, Duration.create(5, TimeUnit.SECONDS)).getClass());
+            }
+        }
+    }
+
+    @Test
+    public void testWrite() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        verify(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
+
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                WriteDataReply.SERIALIZABLE_CLASS);
+    }
+
+    @Test(expected=IllegalStateException.class)
+    public void testWritePreConditionCheck() {
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_ONLY);
+
+        transactionProxy.write(TestModel.TEST_PATH,
+                ImmutableNodes.containerNode(TestModel.TEST_QNAME));
+    }
+
+    @Test(expected=IllegalStateException.class)
+    public void testWriteAfterReadyPreConditionCheck() {
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
+
+        transactionProxy.ready();
+
+        transactionProxy.write(TestModel.TEST_PATH,
+                ImmutableNodes.containerNode(TestModel.TEST_QNAME));
+    }
+
+    @Test
+    public void testMerge() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(mergeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedMergeData(nodeToWrite));
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
+
+        transactionProxy.merge(TestModel.TEST_PATH, nodeToWrite);
+
+        verify(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedMergeData(nodeToWrite));
+
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                MergeDataReply.SERIALIZABLE_CLASS);
     }
 
     @Test
     public void testDelete() throws Exception {
-        final Props props = Props.create(MessageCollectorActor.class);
-        final ActorRef actorRef = getSystem().actorOf(props);
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(actorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(actorRef));
-        actorContext.setExecuteRemoteOperationResponse("message");
+        doReturn(deleteSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedDeleteData());
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
 
         transactionProxy.delete(TestModel.TEST_PATH);
 
-        Object messages = testContext
-            .executeLocalOperation(actorRef, "messages",
-                ActorContext.ASK_DURATION);
+        verify(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedDeleteData());
+
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                DeleteDataReply.SERIALIZABLE_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
+                }
+            }
+        }
+    }
+
+    @Test
+    public void testReady() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(readSerializedDataReply(null)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
 
-        Assert.assertNotNull(messages);
+        doReturn(readySerializedTxReply(actorRef.path().toString())).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), isA(ReadyTransaction.SERIALIZABLE_CLASS));
 
-        Assert.assertTrue(messages instanceof List);
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
 
-        List<Object> listMessages = (List<Object>) messages;
+        transactionProxy.read(TestModel.TEST_PATH);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
+
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
 
-        Assert.assertEquals(1, listMessages.size());
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
+
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                WriteDataReply.SERIALIZABLE_CLASS);
 
-        Assert.assertEquals(DeleteData.SERIALIZABLE_CLASS, listMessages.get(0).getClass());
+        verifyCohortFutures(proxy, getSystem().actorSelection(actorRef.path()));
     }
 
     @Test
-    public void testReady() throws Exception {
-        final Props props = Props.create(DoNothingActor.class);
-        final ActorRef doNothingActorRef = getSystem().actorOf(props);
+    public void testReadyForwardCompatibility() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE, 0);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(readSerializedDataReply(null)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(doNothingActorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(doNothingActorRef));
-        actorContext.setExecuteRemoteOperationResponse(new ReadyTransactionReply(doNothingActorRef.path()).toSerializable());
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+        doReturn(readySerializedTxReply(actorRef.path().toString())).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), isA(ReadyTransaction.SERIALIZABLE_CLASS));
 
+        doReturn(actorRef.path().toString()).when(mockActorContext).resolvePath(eq(actorRef.path().toString()),
+                eq(actorRef.path().toString()));
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
 
         transactionProxy.read(TestModel.TEST_PATH);
 
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
+
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
+
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
+
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                WriteDataReply.SERIALIZABLE_CLASS);
+
+        verifyCohortFutures(proxy, getSystem().actorSelection(actorRef.path()));
+
+        verify(mockActorContext).resolvePath(eq(actorRef.path().toString()),
+                eq(actorRef.path().toString()));
+    }
+
+    @Test
+    public void testReadyWithRecordingOperationFailure() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(mergeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedMergeData(nodeToWrite));
+
+        doReturn(Futures.failed(new TestException())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
+
+        doReturn(readySerializedTxReply(actorRef.path().toString())).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), isA(ReadyTransaction.SERIALIZABLE_CLASS));
+
+        doReturn(false).when(mockActorContext).isPathLocal(actorRef.path().toString());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
+
+        transactionProxy.merge(TestModel.TEST_PATH, nodeToWrite);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
         DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
 
-        Assert.assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
 
         ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
-        Assert.assertTrue("No cohort paths returned", proxy.getCohortPaths().size() > 0);
+        verifyCohortFutures(proxy, TestException.class);
 
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                MergeDataReply.SERIALIZABLE_CLASS, TestException.class);
     }
 
     @Test
-    public void testGetIdentifier(){
-        final Props props = Props.create(DoNothingActor.class);
-        final ActorRef doNothingActorRef = getSystem().actorOf(props);
+    public void testReadyWithReplyFailure() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(mergeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedMergeData(nodeToWrite));
+
+        doReturn(Futures.failed(new TestException())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)),
+                        isA(ReadyTransaction.SERIALIZABLE_CLASS));
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteShardOperationResponse( createTransactionReply(doNothingActorRef) );
+        transactionProxy.merge(TestModel.TEST_PATH, nodeToWrite);
+
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
+
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
+
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+                MergeDataReply.SERIALIZABLE_CLASS);
 
-        Assert.assertNotNull(transactionProxy.getIdentifier());
+        verifyCohortFutures(proxy, TestException.class);
     }
 
     @Test
-    public void testClose(){
-        final Props props = Props.create(MessageCollectorActor.class);
-        final ActorRef actorRef = getSystem().actorOf(props);
+    public void testReadyWithInitialCreateTransactionFailure() throws Exception {
 
-        final MockActorContext actorContext = new MockActorContext(this.getSystem());
-        actorContext.setExecuteLocalOperationResponse(createPrimaryFound(actorRef));
-        actorContext.setExecuteShardOperationResponse(createTransactionReply(actorRef));
-        actorContext.setExecuteRemoteOperationResponse("message");
+        doReturn(Futures.failed(new PrimaryNotFoundException("mock"))).when(
+                mockActorContext).findPrimaryShardAsync(anyString());
 
-        TransactionProxy transactionProxy =
-            new TransactionProxy(actorContext,
-                TransactionProxy.TransactionType.READ_ONLY, transactionExecutor, TestModel.createTestContext());
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        transactionProxy.merge(TestModel.TEST_PATH, nodeToWrite);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        transactionProxy.delete(TestModel.TEST_PATH);
+
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
+
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
+
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
+
+        verifyCohortFutures(proxy, PrimaryNotFoundException.class);
+    }
+
+    @Test
+    public void testReadyWithInvalidReplyMessageType() throws Exception {
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), WRITE_ONLY);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(writeSerializedDataReply()).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedWriteData(nodeToWrite));
+
+        doReturn(Futures.successful(new Object())).when(mockActorContext).
+                executeOperationAsync(eq(actorSelection(actorRef)),
+                        isA(ReadyTransaction.SERIALIZABLE_CLASS));
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                WRITE_ONLY);
+
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
+
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
+
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
+
+        verifyCohortFutures(proxy, IllegalArgumentException.class);
+    }
+
+    @Test
+    public void testGetIdentifier() {
+        setupActorContextWithInitialCreateTransaction(getSystem(), READ_ONLY);
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                TransactionProxy.TransactionType.READ_ONLY);
+
+        Object id = transactionProxy.getIdentifier();
+        assertNotNull("getIdentifier returned null", id);
+        assertTrue("Invalid identifier: " + id, id.toString().startsWith(memberName));
+    }
+
+    @Test
+    public void testClose() throws Exception{
+        ActorRef actorRef = setupActorContextWithInitialCreateTransaction(getSystem(), READ_WRITE);
+
+        doReturn(readSerializedDataReply(null)).when(mockActorContext).executeOperationAsync(
+                eq(actorSelection(actorRef)), eqSerializedReadData());
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,
+                READ_WRITE);
 
         transactionProxy.read(TestModel.TEST_PATH);
 
         transactionProxy.close();
 
-        Object messages = testContext
-            .executeLocalOperation(actorRef, "messages",
-                ActorContext.ASK_DURATION);
+        verify(mockActorContext).sendOperationAsync(
+                eq(actorSelection(actorRef)), isA(CloseTransaction.SERIALIZABLE_CLASS));
+    }
+
 
-        Assert.assertNotNull(messages);
+    /**
+     * Method to test a local Tx actor. The Tx paths are matched to decide if the
+     * Tx actor is local or not. This is done by mocking the Tx actor path
+     * and the caller paths and ensuring that the paths have the remote-address format
+     *
+     * Note: Since the default akka provider for test is not a RemoteActorRefProvider,
+     * the paths returned for the actors for all the tests are not qualified remote paths.
+     * Hence are treated as non-local/remote actors. In short, all tests except
+     * few below run for remote actors
+     *
+     * @throws Exception
+     */
+    @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));
 
-        Assert.assertTrue(messages instanceof List);
+        String actorPath = "akka.tcp://system@127.0.0.1:2550/user/tx-actor";
+        CreateTransactionReply createTransactionReply = CreateTransactionReply.newBuilder()
+            .setTransactionId("txn-1")
+            .setTransactionActorPath(actorPath)
+            .build();
 
-        List<Object> listMessages = (List<Object>) messages;
+        doReturn(Futures.successful(createTransactionReply)).when(mockActorContext).
+            executeOperationAsync(eq(actorSystem.actorSelection(shardActorRef.path())),
+                eqCreateTransaction(memberName, READ_ONLY));
 
-        Assert.assertEquals(1, listMessages.size());
+        doReturn(true).when(mockActorContext).isPathLocal(actorPath);
 
-        Assert.assertTrue(listMessages.get(0).getClass().equals(CloseTransaction.SERIALIZABLE_CLASS));
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext,READ_ONLY);
+
+        // negative test case with null as the reply
+        doReturn(readDataReply(null)).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqReadData());
+
+        Optional<NormalizedNode<?, ?>> readOptional = transactionProxy.read(
+            TestModel.TEST_PATH).get(5, TimeUnit.SECONDS);
+
+        assertEquals("NormalizedNode isPresent", false, readOptional.isPresent());
+
+        // test case with node as read data reply
+        NormalizedNode<?, ?> expectedNode = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(readDataReply(expectedNode)).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqReadData());
+
+        readOptional = transactionProxy.read(TestModel.TEST_PATH).get(5, TimeUnit.SECONDS);
+
+        assertEquals("NormalizedNode isPresent", true, readOptional.isPresent());
+
+        assertEquals("Response NormalizedNode", expectedNode, readOptional.get());
+
+        // test for local data exists
+        doReturn(dataExistsReply(true)).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqDataExists());
+
+        boolean exists = transactionProxy.exists(TestModel.TEST_PATH).checkedGet();
+
+        assertEquals("Exists response", true, exists);
     }
 
-    private CreateTransactionReply createTransactionReply(ActorRef actorRef){
-        return CreateTransactionReply.newBuilder()
-            .setTransactionActorPath(actorRef.path().toString())
+    @Test
+    public void testLocalTxActorWrite() 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, WRITE_ONLY));
+
+        doReturn(true).when(mockActorContext).isPathLocal(actorPath);
+
+        NormalizedNode<?, ?> nodeToWrite = ImmutableNodes.containerNode(TestModel.TEST_QNAME);
+
+        doReturn(writeDataReply()).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqWriteData(nodeToWrite));
+
+        TransactionProxy transactionProxy = new TransactionProxy(mockActorContext, WRITE_ONLY);
+        transactionProxy.write(TestModel.TEST_PATH, nodeToWrite);
+
+        verify(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqWriteData(nodeToWrite));
+
+        //testing local merge
+        doReturn(mergeDataReply()).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqMergeData(nodeToWrite));
+
+        transactionProxy.merge(TestModel.TEST_PATH, nodeToWrite);
+
+        verify(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqMergeData(nodeToWrite));
+
+
+        //testing local delete
+        doReturn(deleteDataReply()).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), eqDeleteData());
+
+        transactionProxy.delete(TestModel.TEST_PATH);
+
+        verify(mockActorContext).executeOperationAsync(any(ActorSelection.class), eqDeleteData());
+
+        verifyRecordingOperationFutures(transactionProxy.getRecordedOperationFutures(),
+            WriteDataReply.class, MergeDataReply.class, DeleteDataReply.class);
+
+        // testing ready
+        doReturn(readyTxReply(shardActorRef.path().toString())).when(mockActorContext).executeOperationAsync(
+            any(ActorSelection.class), isA(ReadyTransaction.class));
+
+        DOMStoreThreePhaseCommitCohort ready = transactionProxy.ready();
+
+        assertTrue(ready instanceof ThreePhaseCommitCohortProxy);
+
+        ThreePhaseCommitCohortProxy proxy = (ThreePhaseCommitCohortProxy) ready;
+
+        verifyCohortFutures(proxy, getSystem().actorSelection(shardActorRef.path()));
     }
 }