### Question:
AmqpChannel implements AmqpChannelView { @Override public String getTransactionType() { String transactionType = "unidentified"; if (transaction instanceof AutoCommitTransaction) { transactionType = "AutoCommit"; } else if (transaction instanceof LocalTransaction) { transactionType = "LocalTransaction"; } else if (transaction instanceof DistributedTransaction) { transactionType = "DistributedTransaction"; } return transactionType; } AmqpChannel(AmqpServerConfiguration configuration,
                       Broker broker,
                       int channelId,
                       AmqpMetricManager metricManager,
                       AmqpConnectionHandler connection); void declareExchange(String exchangeName, String exchangeType, boolean passive, boolean durable); void deleteExchange(String exchangeName, boolean ifUnused); void declareQueue(ShortString queue, boolean passive,
                             boolean durable, boolean autoDelete); void bind(ShortString queue, ShortString exchange,
                     ShortString routingKey, FieldTable arguments); void unbind(ShortString queue, ShortString exchange, ShortString routingKey); AmqpConsumer consume(ShortString queueName, ShortString consumerTag, boolean exclusive,
                               ChannelHandlerContext ctx); void close(); void cancelConsumer(ShortString consumerTag); InMemoryMessageAggregator getMessageAggregator(); void acknowledge(long deliveryTag, boolean multiple); int getNextConsumerTag(); long getNextDeliveryTag(); @Override int getChannelId(); @Override int getConsumerCount(); @Override int getUnackedMessageCount(); @Override int getDeliveryPendingMessageCount(); @Override String getTransactionType(); @Override int getPrefetchCount(); @Override long getCreatedTime(); void recordMessageDelivery(long deliveryTag, AckData ackData); void reject(long deliveryTag, boolean requeue); Collection<AckData> recover(); void requeueAll(); int getConnectionId(); void setFlow(boolean active); boolean isReady(); @Override boolean isClosed(); @Override boolean isFlowEnabled(); ChannelFlowManager getFlowManager(); void hold(AmqpDeliverMessage deliverMessage); List<AmqpDeliverMessage> getPendingMessages(); void setPrefetchCount(int prefetchCount); AmqpDeliverMessage createDeliverMessage(Message message, ShortString consumerTag, String queueName); void setLocalTransactional(); void setDistributedTransactional(); void commit(); void rollback(); boolean isNonTransactional(); void startDtx(Xid xid, boolean join, boolean resume); void endDtx(Xid xid, boolean fail, boolean suspend); void prepare(Xid xid); void commit(Xid xid, boolean onePhase); void rollback(Xid xid); void forget(Xid xid); void setTimeout(Xid xid, long timeout); static final String DELIVERY_TAG_FIELD_NAME; static final String CHANNEL_ID_FIELD_NAME; }### Answer:
@Test public void testGetTransactionType() throws Exception { Assert.assertEquals(amqpChannel.getTransactionType(), "AutoCommit"); amqpChannel.setLocalTransactional(); Assert.assertEquals(amqpChannel.getTransactionType(), "LocalTransaction"); amqpChannel.setDistributedTransactional(); Assert.assertEquals(amqpChannel.getTransactionType(), "DistributedTransaction"); }