content: /*
   * 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.transport.mqtt;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  import static org.mockito.Mockito.times;
  
  import java.io.IOException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  
  import org.apache.activemq.broker.BrokerService;
  import org.apache.activemq.command.Command;
  import org.apache.activemq.command.ConnectionInfo;
  import org.apache.activemq.command.ProducerInfo;
  import org.apache.activemq.command.RemoveInfo;
  import org.apache.activemq.command.Response;
  import org.apache.activemq.transport.mqtt.strategy.MQTTSubscriptionStrategy;
  import org.fusesource.mqtt.codec.CONNACK;
  import org.fusesource.mqtt.codec.CONNECT;
  import org.fusesource.mqtt.codec.MQTTFrame;
  import org.junit.Before;
  import org.junit.Test;
  import org.mockito.ArgumentCaptor;
  import org.mockito.Mockito;
  
  /**
   * Tests for various usage scenarios of the protocol converter
   */
  public class MQTTProtocolConverterTest {
  
      private MQTTTransport transport;
      private BrokerService broker;
  
      @Before
      public void setUp() throws Exception {
          transport = Mockito.mock(MQTTTransport.class);
          broker = Mockito.mock(BrokerService.class);
      }
  
      @Test
      public void testConnectWithInvalidProtocolVersionToLow() throws IOException {
          doTestConnectWithInvalidProtocolVersion(2);
      }
  
      @Test
      public void testConnectWithInvalidProtocolVersionToHigh() throws IOException {
          doTestConnectWithInvalidProtocolVersion(5);
      }
  
      private void doTestConnectWithInvalidProtocolVersion(int version) throws IOException {
          MQTTProtocolConverter converter = new MQTTProtocolConverter(transport, broker);
  
          CONNECT connect = Mockito.mock(CONNECT.class);
  
          Mockito.when(connect.version()).thenReturn(version);
  
          converter.onMQTTConnect(connect);
          ArgumentCaptor<IOException> capturedException = ArgumentCaptor.forClass(IOException.class);
          Mockito.verify(transport).onException(capturedException.capture());
  
          assertTrue(capturedException.getValue().getMessage().contains("version"));
  
          ArgumentCaptor<MQTTFrame> capturedFrame = ArgumentCaptor.forClass(MQTTFrame.class);
          Mockito.verify(transport).sendToMQTT(capturedFrame.capture());
  
          MQTTFrame response = capturedFrame.getValue();
          assertEquals(CONNACK.TYPE, response.messageType());
  
          CONNACK connAck = new CONNACK().decode(response);
          assertEquals(CONNACK.Code.CONNECTION_REFUSED_UNACCEPTED_PROTOCOL_VERSION, connAck.code());
      }
  
      @Test
      public void testConcurrentOnTransportError() throws Exception {
          MQTTProtocolConverter converter = new MQTTProtocolConverter(transport, broker);
          converter.setSubsciptionStrategy(Mockito.mock(MQTTSubscriptionStrategy.class));
  
          CONNECT connect = Mockito.mock(CONNECT.class);
  
          Mockito.when(connect.version()).thenReturn(3);
          Mockito.when(connect.cleanSession()).thenReturn(true);
  
          converter.onMQTTConnect(connect);
  
          ArgumentCaptor<ConnectionInfo> connectionInfoArgumentCaptor = ArgumentCaptor.forClass(ConnectionInfo.class);
          Mockito.verify(transport).sendToActiveMQ(connectionInfoArgumentCaptor.capture());
  
          ConnectionInfo connectInfo = connectionInfoArgumentCaptor.getValue();
          Response ok = new Response();
          ok.setCorrelationId(connectInfo.getCommandId());
          converter.onActiveMQCommand(ok);
  
          ArgumentCaptor<Command> producerInfoArgumentCaptor = ArgumentCaptor.forClass(Command.class);
          Mockito.verify(transport, times(3)).sendToActiveMQ(producerInfoArgumentCaptor.capture());
  
          ProducerInfo producerInfo = (ProducerInfo) producerInfoArgumentCaptor.getValue();
          ok = new Response();
          ok.setCorrelationId(producerInfo.getCommandId());
          converter.onActiveMQCommand(ok);
  
          ExecutorService executorService = Executors.newCachedThreadPool();
          for (int i=0; i<10; i++) {
              executorService.submit(new Runnable() {
                  @Override
                  public void run() {
                      converter.onTransportError();
                  }
              });
          }
  
          executorService.shutdown();
          executorService.awaitTermination(10, TimeUnit.SECONDS);
  
          ArgumentCaptor<RemoveInfo> removeInfo = ArgumentCaptor.forClass(RemoveInfo.class);
          Mockito.verify(transport, times(4)).sendToActiveMQ(removeInfo.capture());
  
      }
  }
  