ARTEMIS-2135 Test multiple core consumers receiving amqp messages

This test can verify an issue fixed by the commit:
7a463f038a (ARTEMIS-2096)

The issue was reported later by users where messages
sent by amqp clients are having their body size
randomly being zero when received by multiple core
consumers.

This was also fixed on commit  48e0fc8f42 but that
was exclusively on 2.6.x branch.

tests/integration-tests/src/test/java/org/apache/activemq/artemis/tests/integration/amqp/interop/AmqpCoreTest.java

@@ -0,0 +1,134 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.activemq.artemis.tests.integration.amqp.interop;
+
+import org.apache.activemq.artemis.api.core.RoutingType;
+import org.apache.activemq.artemis.api.core.client.ClientConsumer;
+import org.apache.activemq.artemis.api.core.client.ClientMessage;
+import org.apache.activemq.artemis.api.core.client.ClientSession;
+import org.apache.activemq.artemis.api.core.client.MessageHandler;
+import org.apache.activemq.artemis.jms.client.ActiveMQSession;
+import org.apache.activemq.artemis.junit.Wait;
+import org.apache.activemq.artemis.tests.integration.amqp.JMSClientTestSupport;
+import org.apache.qpid.jms.JmsConnectionFactory;
+import org.apache.qpid.jms.JmsTopic;
+import org.junit.Test;
+
+import javax.jms.Connection;
+import javax.jms.ConnectionFactory;
+import javax.jms.MessageProducer;
+import javax.jms.Session;
+
+public class AmqpCoreTest extends JMSClientTestSupport {
+
+   @Override
+   protected String getConfiguredProtocols() {
+      return "AMQP,OPENWIRE,CORE";
+   }
+
+   @Override
+   public void setUp() throws Exception {
+      super.setUp();
+   }
+
+   @Test
+   public void testMultipleCoreReceiving() throws Exception {
+
+      Connection coreJmsConn = this.createCoreConnection();
+
+      final int total = 100;
+
+      try {
+         Session session = coreJmsConn.createSession(false, Session.AUTO_ACKNOWLEDGE);
+         ClientSession coreSession = ((ActiveMQSession) session).getCoreSession();
+         coreSession.createQueue("exampleQueueAddress", RoutingType.MULTICAST, "exampleQueue1");
+         coreSession.createQueue("exampleQueueAddress", RoutingType.MULTICAST, "exampleQueue2");
+         coreSession.createQueue("exampleQueueAddress", RoutingType.MULTICAST, "exampleQueue3");
+
+         ClientConsumer consumer1 = coreSession.createConsumer("exampleQueue1");
+         CoreMessageHandler handler1 = new CoreMessageHandler(1);
+         consumer1.setMessageHandler(handler1);
+         ClientConsumer consumer2 = coreSession.createConsumer("exampleQueue2");
+         CoreMessageHandler handler2 = new CoreMessageHandler(2);
+         consumer2.setMessageHandler(handler2);
+         CoreMessageHandler handler3 = new CoreMessageHandler(3);
+         ClientConsumer consumer3 = coreSession.createConsumer("exampleQueue3");
+         consumer3.setMessageHandler(handler3);
+
+         sendAmqpMessages("exampleQueueAddress", total);
+
+         assertTrue("not enough message received: " + handler1.getNumMsg() + " expected: " + total, handler1.waitForMessages(total));
+         assertTrue("not enough message received: " + handler2.getNumMsg() + " expected: " + total, handler2.waitForMessages(total));
+         assertTrue("not enough message received: " + handler3.getNumMsg() + " expected: " + total, handler3.waitForMessages(total));
+
+
+      } finally {
+         coreJmsConn.close();
+      }
+   }
+
+   private void sendAmqpMessages(String address, int total) throws Exception {
+      ConnectionFactory cfAMQP = new JmsConnectionFactory("amqp://127.0.0.1:" + AMQP_PORT);
+      Connection connectionAMQP = cfAMQP.createConnection();
+      try {
+         connectionAMQP.start();
+         Session sessionAMQP = connectionAMQP.createSession(false, Session.AUTO_ACKNOWLEDGE);
+         MessageProducer sender = sessionAMQP.createProducer(new JmsTopic(address));
+
+         for (int i = 0; i < total; i++) {
+            sender.send(sessionAMQP.createTextMessage("hello"));
+         }
+      } finally {
+         connectionAMQP.close();
+      }
+   }
+
+   private class CoreMessageHandler implements MessageHandler {
+      int id;
+      int numMsg = 0;
+      volatile boolean zeroLen = false;
+
+      CoreMessageHandler(int id) {
+         this.id = id;
+      }
+
+      @Override
+      public void onMessage(ClientMessage message) {
+         System.out.println("received: " + message.getBodySize());
+         if (message.getBodySize() == 0) {
+            System.out.println("xxx found zero len message!");
+            zeroLen = true;
+         }
+         addMessage(message);
+      }
+
+      private synchronized void addMessage(ClientMessage message) {
+         numMsg++;
+         System.out.println("[receiver " + id + "] recieved: " + numMsg);
+      }
+
+      public synchronized boolean waitForMessages(int num) throws Exception {
+         assertFalse(zeroLen);
+         return Wait.waitFor(() -> numMsg == num, 30000);
+      }
+
+      public int getNumMsg() {
+         return numMsg;
+      }
+   }
+
+}