private async Task OnSessionTestAsync(bool partitioned, bool sessionEnabled, int maxConcurrentCalls, ReceiveMode mode, bool autoComplete)
        {
            await ServiceBusScope.UsingTopicAsync(partitioned, sessionEnabled, async (topicName, subscriptionName) =>
            {
                TestUtility.Log($"Topic: {topicName}, MaxConcurrentCalls: {maxConcurrentCalls}, Receive Mode: {mode.ToString()}, AutoComplete: {autoComplete}");
                var topicClient        = new TopicClient(TestUtility.NamespaceConnectionString, topicName);
                var subscriptionClient = new SubscriptionClient(
                    TestUtility.NamespaceConnectionString,
                    topicClient.TopicName,
                    subscriptionName,
                    ReceiveMode.PeekLock);

                try
                {
                    var sessionHandlerOptions =
                        new SessionHandlerOptions(ExceptionReceivedHandler)
                    {
                        MaxConcurrentSessions = maxConcurrentCalls,
                        MessageWaitTimeout    = TimeSpan.FromSeconds(5),
                        AutoComplete          = true
                    };

                    var testSessionHandler = new TestSessionHandler(
                        subscriptionClient.ReceiveMode,
                        sessionHandlerOptions,
                        topicClient.InnerSender,
                        subscriptionClient.SessionPumpHost);

                    // Send messages to Session
                    await testSessionHandler.SendSessionMessages();

                    // Register handler
                    testSessionHandler.RegisterSessionHandler(sessionHandlerOptions);

                    // Verify messages were received.
                    await testSessionHandler.VerifyRun();

                    testSessionHandler.ClearData();
                }
                finally
                {
                    await subscriptionClient.CloseAsync();
                    await topicClient.CloseAsync();
                }
            });

            // test UnregisterSessionHandler can wait for message handling upto the timeout user defined.
            await ServiceBusScope.UsingTopicAsync(partitioned, sessionEnabled, async (topicName, subscriptionName) =>
            {
                TestUtility.Log($"Topic: {topicName}, MaxConcurrentCalls: {maxConcurrentCalls}, Receive Mode: {mode.ToString()}, AutoComplete: {autoComplete}");
                var topicClient        = new TopicClient(TestUtility.NamespaceConnectionString, topicName);
                var subscriptionClient = new SubscriptionClient(
                    TestUtility.NamespaceConnectionString,
                    topicClient.TopicName,
                    subscriptionName,
                    ReceiveMode.PeekLock);

                try
                {
                    var sessionHandlerOptions =
                        new SessionHandlerOptions(ExceptionReceivedHandler)
                    {
                        MaxConcurrentSessions = maxConcurrentCalls,
                        MessageWaitTimeout    = TimeSpan.FromSeconds(5),
                        AutoComplete          = true
                    };

                    var testSessionHandler = new TestSessionHandler(
                        subscriptionClient.ReceiveMode,
                        sessionHandlerOptions,
                        topicClient.InnerSender,
                        subscriptionClient.SessionPumpHost);

                    // Send messages to Session
                    await testSessionHandler.SendSessionMessages();

                    // Register handler
                    testSessionHandler.RegisterSessionHandlerAndRecordReceivedMessageCount(subscriptionClient.ReceiveMode == ReceiveMode.PeekLock, 8);

                    // Session handler set up has greater latency than message handler. Delay here to enable some processing time of the session pump.
                    await Task.Delay(TimeSpan.FromSeconds(2));

                    // UnregisterSessionHandler should wait up to the provided timeout to finish the message handling tasks
                    await testSessionHandler.UnregisterSessionHandler(TimeSpan.FromSeconds(10));
                    Assert.True(testSessionHandler.ReceivedMessageCount == maxConcurrentCalls);

                    // Reregister won't have any problems
                    testSessionHandler.RegisterSessionHandlerAndRecordReceivedMessageCount(subscriptionClient.ReceiveMode == ReceiveMode.PeekLock, 0);
                    await testSessionHandler.WaitForAllMessagesReceived(ExpectedMessageCount);
                    Assert.True(testSessionHandler.ReceivedMessageCount == ExpectedMessageCount);

                    testSessionHandler.ClearData();
                }
                finally
                {
                    await subscriptionClient.CloseAsync();
                    await topicClient.CloseAsync();
                }
            });

            // test UnregisterSessionHandler can close down in time when message handling takes longer than wait timeout user defined.
            await ServiceBusScope.UsingTopicAsync(partitioned, sessionEnabled, async (topicName, subscriptionName) =>
            {
                TestUtility.Log($"Topic: {topicName}, MaxConcurrentCalls: {maxConcurrentCalls}, Receive Mode: {mode.ToString()}, AutoComplete: {autoComplete}");
                var topicClient        = new TopicClient(TestUtility.NamespaceConnectionString, topicName);
                var subscriptionClient = new SubscriptionClient(
                    TestUtility.NamespaceConnectionString,
                    topicClient.TopicName,
                    subscriptionName,
                    ReceiveMode.PeekLock);

                try
                {
                    var sessionHandlerOptions =
                        new SessionHandlerOptions(ExceptionReceivedHandler)
                    {
                        MaxConcurrentSessions = maxConcurrentCalls,
                        MessageWaitTimeout    = TimeSpan.FromSeconds(5),
                        AutoComplete          = true
                    };

                    var testSessionHandler = new TestSessionHandler(
                        subscriptionClient.ReceiveMode,
                        sessionHandlerOptions,
                        topicClient.InnerSender,
                        subscriptionClient.SessionPumpHost);

                    // Send messages to Session
                    await testSessionHandler.SendSessionMessages();

                    // Register handler
                    testSessionHandler.RegisterSessionHandlerAndRecordReceivedMessageCount(subscriptionClient.ReceiveMode == ReceiveMode.PeekLock, 8);

                    // UnregisterSessionHandler should wait up to the provided timeout to finish the message handling tasks
                    await testSessionHandler.UnregisterSessionHandler(TimeSpan.FromSeconds(2));
                    Assert.True(testSessionHandler.ReceivedMessageCount == 0);

                    // Reregister won't have any problems
                    testSessionHandler.RegisterSessionHandlerAndRecordReceivedMessageCount(subscriptionClient.ReceiveMode == ReceiveMode.PeekLock, 0);
                    await testSessionHandler.WaitForAllMessagesReceived(ExpectedMessageCount);
                    Assert.True(testSessionHandler.ReceivedMessageCount == ExpectedMessageCount);

                    testSessionHandler.ClearData();
                }
                finally
                {
                    await subscriptionClient.CloseAsync();
                    await topicClient.CloseAsync();
                }
            });
        }
        private async Task OnSessionTestAsync(bool partitioned, bool sessionEnabled, int maxConcurrentCalls, ReceiveMode mode, bool autoComplete)
        {
            await ServiceBusScope.UsingTopicAsync(partitioned, sessionEnabled, async (topicName, subscriptionName) =>
            {
                TestUtility.Log($"Topic: {topicName}, MaxConcurrentCalls: {maxConcurrentCalls}, Receive Mode: {mode.ToString()}, AutoComplete: {autoComplete}");
                var topicClient        = new TopicClient(TestUtility.NamespaceConnectionString, topicName);
                var subscriptionClient = new SubscriptionClient(
                    TestUtility.NamespaceConnectionString,
                    topicClient.TopicName,
                    subscriptionName,
                    ReceiveMode.PeekLock);

                try
                {
                    var sessionHandlerOptions =
                        new SessionHandlerOptions(ExceptionReceivedHandler)
                    {
                        MaxConcurrentSessions = maxConcurrentCalls,
                        MessageWaitTimeout    = TimeSpan.FromSeconds(5),
                        AutoComplete          = true
                    };

                    var testSessionHandler = new TestSessionHandler(
                        subscriptionClient.ReceiveMode,
                        sessionHandlerOptions,
                        topicClient.InnerSender,
                        subscriptionClient.SessionPumpHost);

                    // Send messages to Session
                    await testSessionHandler.SendSessionMessages();

                    // Register handler
                    testSessionHandler.RegisterSessionHandler(sessionHandlerOptions);

                    // Verify messages were received.
                    await testSessionHandler.VerifyRun();

                    testSessionHandler.ClearData();
                }
                finally
                {
                    await subscriptionClient.CloseAsync();
                    await topicClient.CloseAsync();
                }
            });

            // test UnregisterSessionHandler can wait for message handling upto the timeout user defined.
            await ServiceBusScope.UsingTopicAsync(partitioned, sessionEnabled, async (topicName, subscriptionName) =>
            {
                TestUtility.Log($"Topic: {topicName}, MaxConcurrentCalls: {maxConcurrentCalls}, Receive Mode: {mode.ToString()}, AutoComplete: {autoComplete}");
                var topicClient        = new TopicClient(TestUtility.NamespaceConnectionString, topicName);
                var subscriptionClient = new SubscriptionClient(
                    TestUtility.NamespaceConnectionString,
                    topicClient.TopicName,
                    subscriptionName,
                    ReceiveMode.PeekLock);

                try
                {
                    var sessionHandlerOptions =
                        new SessionHandlerOptions(ExceptionReceivedHandler)
                    {
                        MaxConcurrentSessions = maxConcurrentCalls,
                        MessageWaitTimeout    = TimeSpan.FromSeconds(5),
                        AutoComplete          = true
                    };

                    var testSessionHandler = new TestSessionHandler(
                        subscriptionClient.ReceiveMode,
                        sessionHandlerOptions,
                        topicClient.InnerSender,
                        subscriptionClient.SessionPumpHost);

                    // Send messages to Session
                    await testSessionHandler.SendSessionMessages();

                    // Register handler
                    var count = 0;
                    testSessionHandler.RegisterSessionHandler(
                        async(session, message, token) =>
                    {
                        await Task.Delay(TimeSpan.FromSeconds(8));
                        TestUtility.Log($"Received Session: {session.SessionId} message: SequenceNumber: {message.SystemProperties.SequenceNumber}");

                        if (subscriptionClient.ReceiveMode == ReceiveMode.PeekLock && !sessionHandlerOptions.AutoComplete)
                        {
                            await session.CompleteAsync(message.SystemProperties.LockToken);
                        }
                        Interlocked.Increment(ref count);
                    },
                        sessionHandlerOptions);

                    await Task.Delay(TimeSpan.FromSeconds(2));
                    // UnregisterSessionHandler should wait up to the provided timeout to finish the message handling tasks
                    await testSessionHandler.UnregisterSessionHandler(TimeSpan.FromSeconds(10));
                    Assert.True(count == maxConcurrentCalls);

                    testSessionHandler.ClearData();
                }
                finally
                {
                    await subscriptionClient.CloseAsync();
                    await topicClient.CloseAsync();
                }
            });

            // test UnregisterSessionHandler can close down in time when message handling takes longer than wait timeout user defined.
            await ServiceBusScope.UsingTopicAsync(partitioned, sessionEnabled, async (topicName, subscriptionName) =>
            {
                TestUtility.Log($"Topic: {topicName}, MaxConcurrentCalls: {maxConcurrentCalls}, Receive Mode: {mode.ToString()}, AutoComplete: {autoComplete}");
                var topicClient        = new TopicClient(TestUtility.NamespaceConnectionString, topicName);
                var subscriptionClient = new SubscriptionClient(
                    TestUtility.NamespaceConnectionString,
                    topicClient.TopicName,
                    subscriptionName,
                    ReceiveMode.PeekLock);

                try
                {
                    var sessionHandlerOptions =
                        new SessionHandlerOptions(ExceptionReceivedHandler)
                    {
                        MaxConcurrentSessions = maxConcurrentCalls,
                        MessageWaitTimeout    = TimeSpan.FromSeconds(5),
                        AutoComplete          = true
                    };

                    var testSessionHandler = new TestSessionHandler(
                        subscriptionClient.ReceiveMode,
                        sessionHandlerOptions,
                        topicClient.InnerSender,
                        subscriptionClient.SessionPumpHost);

                    // Send messages to Session
                    await testSessionHandler.SendSessionMessages();

                    // Register handler
                    var count = 0;
                    testSessionHandler.RegisterSessionHandler(
                        async(session, message, token) =>
                    {
                        await Task.Delay(TimeSpan.FromSeconds(8));
                        TestUtility.Log($"Received Session: {session.SessionId} message: SequenceNumber: {message.SystemProperties.SequenceNumber}");

                        if (subscriptionClient.ReceiveMode == ReceiveMode.PeekLock && !sessionHandlerOptions.AutoComplete)
                        {
                            await session.CompleteAsync(message.SystemProperties.LockToken);
                        }
                        Interlocked.Increment(ref count);
                    },
                        sessionHandlerOptions);

                    await Task.Delay(TimeSpan.FromSeconds(2));
                    // UnregisterSessionHandler should wait up to the provided timeout to finish the message handling tasks
                    await testSessionHandler.UnregisterSessionHandler(TimeSpan.FromSeconds(2));
                    Assert.True(count == 0);

                    testSessionHandler.ClearData();
                }
                finally
                {
                    await subscriptionClient.CloseAsync();
                    await topicClient.CloseAsync();
                }
            });
        }