DefaultChannelManagerTest.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * Licensed 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.kaaproject.kaa.client.channel;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import org.kaaproject.kaa.client.bootstrap.BootstrapManager;
import org.kaaproject.kaa.client.channel.connectivity.ConnectivityChecker;
import org.kaaproject.kaa.client.channel.failover.DefaultFailoverManager;
import org.kaaproject.kaa.client.channel.failover.FailoverManager;
import org.kaaproject.kaa.client.channel.failover.FailoverStatus;
import org.kaaproject.kaa.client.channel.failover.strategies.DefaultFailoverStrategy;
import org.kaaproject.kaa.client.channel.failover.strategies.FailoverStrategy;
import org.kaaproject.kaa.client.channel.impl.ChannelRuntimeException;
import org.kaaproject.kaa.client.channel.impl.DefaultChannelManager;
import org.kaaproject.kaa.client.context.ExecutorContext;
import org.kaaproject.kaa.common.TransportType;
import org.kaaproject.kaa.common.endpoint.security.KeyUtil;
import org.mockito.Mockito;

import java.security.NoSuchAlgorithmException;
import java.security.spec.InvalidKeySpecException;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

public class DefaultChannelManagerTest {

  private static final ExecutorContext CONTEXT = Mockito.mock(ExecutorContext.class);

  private static final Map<TransportType, ChannelDirection> SUPPORTED_TYPES = new HashMap<TransportType, ChannelDirection>();

  static {
    SUPPORTED_TYPES.put(TransportType.PROFILE, ChannelDirection.BIDIRECTIONAL);
    SUPPORTED_TYPES.put(TransportType.CONFIGURATION, ChannelDirection.UP);
    SUPPORTED_TYPES.put(TransportType.NOTIFICATION, ChannelDirection.BIDIRECTIONAL);
    SUPPORTED_TYPES.put(TransportType.USER, ChannelDirection.BIDIRECTIONAL);
    SUPPORTED_TYPES.put(TransportType.EVENT, ChannelDirection.DOWN);

    Mockito.when(CONTEXT.getScheduledExecutor()).thenReturn(Executors.newScheduledThreadPool(1));
  }

  @Test(expected = ChannelRuntimeException.class)
  public void testNullBootstrapServer() {
    new DefaultChannelManager(Mockito.mock(BootstrapManager.class), null, null, null);
  }

  @Test(expected = ChannelRuntimeException.class)
  public void testEmptyBootstrapServer() {
    new DefaultChannelManager(Mockito.mock(BootstrapManager.class), new HashMap<TransportProtocolId, List<TransportConnectionInfo>>(), null, null);
  }

  @Test(expected = ChannelRuntimeException.class)
  public void testEmptyBootstrapManager() {
    new DefaultChannelManager(null, null, null, null);
  }

  @Test
  public void testAddHttpLpChannel() throws NoSuchAlgorithmException, InvalidKeySpecException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = new HashMap<>();
    bootststrapServers.put(TransportProtocolIdConstants.HTTP_TRANSPORT_ID, Collections.singletonList(IpTransportInfoTest.createTestServerInfo(
            ServerType.BOOTSTRAP, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9889, KeyUtil.generateKeyPair().getPublic())));
    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);

    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(SUPPORTED_TYPES);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel.getServerType()).thenReturn(ServerType.OPERATIONS);
    Mockito.when(channel.getId()).thenReturn("mock_channel");

    KaaInternalChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);
    FailoverManager failoverManager = Mockito.spy(new DefaultFailoverManager(channelManager, CONTEXT));
    channelManager.setFailoverManager(failoverManager);
    channelManager.addChannel(channel);
    channelManager.addChannel(channel);

    TransportConnectionInfo server = IpTransportInfoTest.createTestServerInfo(
            ServerType.OPERATIONS, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9999, KeyUtil.generateKeyPair().getPublic());
    channelManager.onTransportConnectionInfoUpdated(server);
    Mockito.verify(failoverManager, Mockito.times(1)).onServerChanged(Mockito.any(TransportConnectionInfo.class));

//        assertEquals(channel, channelManager.getChannelByTransportType(TransportType.PROFILE));
    assertEquals(channel, channelManager.getChannel("mock_channel"));
    assertEquals(channel, channelManager.getChannels().get(0));
    channelManager.removeChannel(channel);
//        assertNull(channelManager.getChannelByTransportType(TransportType.PROFILE));
    assertNull(channelManager.getChannel("mock_channel"));
    assertTrue(channelManager.getChannels().isEmpty());

    channelManager.addChannel(channel);
    Mockito.verify(failoverManager, Mockito.times(2)).onServerChanged(Mockito.any(TransportConnectionInfo.class));
    Mockito.verify(channel, Mockito.times(2)).setServer(server);
    channelManager.clearChannelList();
    assertTrue(channelManager.getChannels().isEmpty());
  }

  @Test
  public void testAddBootstrapChannel() throws NoSuchAlgorithmException, InvalidKeySpecException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = new HashMap<>();
    TransportConnectionInfo server = IpTransportInfoTest.createTestServerInfo(
            ServerType.BOOTSTRAP, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9889, KeyUtil.generateKeyPair().getPublic());
    bootststrapServers.put(TransportProtocolIdConstants.HTTP_TRANSPORT_ID, Collections.singletonList(server));

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);

    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(SUPPORTED_TYPES);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel.getServerType()).thenReturn(ServerType.BOOTSTRAP);
    Mockito.when(channel.getId()).thenReturn("mock_channel");

    KaaChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);
    FailoverManager failoverManager = Mockito.spy(new DefaultFailoverManager(channelManager, CONTEXT));
    channelManager.setFailoverManager(failoverManager);

    channelManager.addChannel(channel);

    Mockito.verify(failoverManager, Mockito.times(1)).onServerChanged(Mockito.any(TransportConnectionInfo.class));
//        assertEquals(channel, channelManager.getChannelByTransportType(TransportType.PROFILE));
    assertEquals(channel, channelManager.getChannel("mock_channel"));
    assertEquals(channel, channelManager.getChannels().get(0));
    channelManager.removeChannel(channel);
//        assertNull(channelManager.getChannelByTransportType(TransportType.PROFILE));
    assertNull(channelManager.getChannel("mock_channel"));
    assertTrue(channelManager.getChannels().isEmpty());

    channelManager.addChannel(channel);
    Mockito.verify(channel, Mockito.times(2)).setServer(server);
  }

  @Test
  public void testOperationServerFailed() throws NoSuchAlgorithmException, InvalidKeySpecException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();
    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);

    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(SUPPORTED_TYPES);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel.getId()).thenReturn("mock_channel");

    KaaInternalChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);
    channelManager.addChannel(channel);

    TransportConnectionInfo opServer = IpTransportInfoTest.createTestServerInfo(
            ServerType.OPERATIONS, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9999, KeyUtil.generateKeyPair().getPublic());
    channelManager.onTransportConnectionInfoUpdated(opServer);

    channelManager.onServerFailed(opServer, FailoverStatus.NO_CONNECTIVITY);
    Mockito.verify(bootstrapManager, Mockito.times(1))
        .useNextOperationsServer(TransportProtocolIdConstants.HTTP_TRANSPORT_ID, FailoverStatus.NO_CONNECTIVITY);
  }

  @Test
  public void testBootstrapServerFailed() throws NoSuchAlgorithmException, InvalidKeySpecException {
    final Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = new HashMap<>();
    bootststrapServers.put(TransportProtocolIdConstants.HTTP_TRANSPORT_ID, Arrays.asList(
        IpTransportInfoTest.createTestServerInfo(
                ServerType.BOOTSTRAP, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9889, KeyUtil.generateKeyPair().getPublic()),
        IpTransportInfoTest.createTestServerInfo(
                ServerType.BOOTSTRAP, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost2", 9889, KeyUtil.generateKeyPair().getPublic())));
    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);

    final KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(SUPPORTED_TYPES);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel.getServerType()).thenReturn(ServerType.BOOTSTRAP);
    Mockito.when(channel.getId()).thenReturn("mock_channel");

    ExecutorContext context = Mockito.mock(ExecutorContext.class);
    Mockito.when(context.getScheduledExecutor()).thenReturn(Executors.newScheduledThreadPool(1));
    KaaChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, context, null);

    FailoverStrategy failoverStrategy = new DefaultFailoverStrategy(1, 1, 1, TimeUnit.MILLISECONDS);
    FailoverManager failoverManager = Mockito.spy(new DefaultFailoverManager(channelManager, CONTEXT, failoverStrategy, 1, TimeUnit.MILLISECONDS));
    channelManager.setFailoverManager(failoverManager);

    channelManager.addChannel(channel);

    Mockito.verify(failoverManager, Mockito.times(1)).onServerChanged(Mockito.any(TransportConnectionInfo.class));

    channelManager.onServerFailed(bootststrapServers.get(TransportProtocolIdConstants.HTTP_TRANSPORT_ID).get(0),
        FailoverStatus.CURRENT_BOOTSTRAP_SERVER_NA);
    new Thread(new Runnable() {
      @Override
      public void run() {
        Mockito.verify(channel, Mockito.timeout(100).times(1)).setServer(bootststrapServers.get(TransportProtocolIdConstants.HTTP_TRANSPORT_ID).get(1));
      }
    });
    Mockito.verify(failoverManager, Mockito.times(1)).onFailover(FailoverStatus.CURRENT_BOOTSTRAP_SERVER_NA);
  }

  @Test
  public void testSingleBootstrapServerFailed() throws NoSuchAlgorithmException, InvalidKeySpecException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = new HashMap<>();
    bootststrapServers.put(TransportProtocolIdConstants.HTTP_TRANSPORT_ID, Arrays.asList(
        IpTransportInfoTest.createTestServerInfo(
                ServerType.BOOTSTRAP, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9889, KeyUtil.generateKeyPair().getPublic())));
    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);

    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(SUPPORTED_TYPES);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel.getServerType()).thenReturn(ServerType.BOOTSTRAP);
    Mockito.when(channel.getId()).thenReturn("mock_channel");

    KaaChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, CONTEXT, null);
    FailoverManager failoverManager = Mockito.spy(new DefaultFailoverManager(channelManager, CONTEXT));
    channelManager.setFailoverManager(failoverManager);

    channelManager.addChannel(channel);

    Mockito.verify(failoverManager, Mockito.times(1)).onServerChanged(Mockito.any(TransportConnectionInfo.class));

    channelManager.onServerFailed(bootststrapServers.get(TransportProtocolIdConstants.HTTP_TRANSPORT_ID).get(0),
        FailoverStatus.CURRENT_BOOTSTRAP_SERVER_NA);
  }

  @Test
  public void testRemoveHttpLpChannel() throws NoSuchAlgorithmException, InvalidKeySpecException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();
    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);

    Map<TransportType, ChannelDirection> typesForChannel2 = new HashMap<>(SUPPORTED_TYPES);
    typesForChannel2.remove(TransportType.USER);
    KaaDataChannel channel1 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel1.getSupportedTransportTypes()).thenReturn(typesForChannel2);
    Mockito.when(channel1.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel1.getServerType()).thenReturn(ServerType.OPERATIONS);
    Mockito.when(channel1.getId()).thenReturn("mock_channel");

    KaaDataChannel channel2 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel2.getSupportedTransportTypes()).thenReturn(SUPPORTED_TYPES);
    Mockito.when(channel2.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.HTTP_TRANSPORT_ID);
    Mockito.when(channel2.getServerType()).thenReturn(ServerType.OPERATIONS);
    Mockito.when(channel2.getId()).thenReturn("mock_channel2");

    KaaDataChannel channel3 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel3.getSupportedTransportTypes()).thenReturn(typesForChannel2);
    Mockito.when(channel3.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel3.getServerType()).thenReturn(ServerType.OPERATIONS);
    Mockito.when(channel3.getId()).thenReturn("mock_tcp_channel3");


    KaaInternalChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    FailoverManager failoverManager = Mockito.spy(new DefaultFailoverManager(channelManager, CONTEXT));
    channelManager.setFailoverManager(failoverManager);

    channelManager.addChannel(channel1);
    channelManager.addChannel(channel2);

    TransportConnectionInfo opServer = IpTransportInfoTest.createTestServerInfo(
            ServerType.OPERATIONS, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9999, KeyUtil.generateKeyPair().getPublic());
    channelManager.onTransportConnectionInfoUpdated(opServer);

    TransportConnectionInfo opServer2 = IpTransportInfoTest.createTestServerInfo(
            ServerType.OPERATIONS, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9889, KeyUtil.generateKeyPair().getPublic());

    channelManager.onTransportConnectionInfoUpdated(opServer2);

    Mockito.verify(channel1, Mockito.times(1)).setServer(opServer);
    Mockito.verify(channel2, Mockito.times(1)).setServer(opServer2);

//        assertEquals(channel2, channelManager.getChannelByTransportType(TransportType.PROFILE));

    channelManager.removeChannel(channel2);

    TransportConnectionInfo opServer3 = IpTransportInfoTest.createTestServerInfo(
            ServerType.OPERATIONS, TransportProtocolIdConstants.TCP_TRANSPORT_ID, "localhost", 9009, KeyUtil.generateKeyPair().getPublic());
    channelManager.addChannel(channel3);
    channelManager.onTransportConnectionInfoUpdated(opServer3);

    Mockito.verify(channel3, Mockito.times(1)).setServer(opServer3);

//        assertEquals(channel3, channelManager.getChannelByTransportType(TransportType.PROFILE));
//        assertNull(channelManager.getChannelByTransportType(TransportType.USER));
  }

  @Test
  public void testConnectivityChecker() throws NoSuchAlgorithmException, InvalidKeySpecException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    TransportProtocolId type = TransportProtocolIdConstants.TCP_TRANSPORT_ID;
    KaaDataChannel channel1 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel1.getTransportProtocolId()).thenReturn(type);
    Mockito.when(channel1.getId()).thenReturn("Channel1");
    KaaDataChannel channel2 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel2.getTransportProtocolId()).thenReturn(type);
    Mockito.when(channel2.getId()).thenReturn("Channel2");

    channelManager.addChannel(channel1);
    channelManager.addChannel(channel2);

    ConnectivityChecker checker = Mockito.mock(ConnectivityChecker.class);

    channelManager.setConnectivityChecker(checker);

    Mockito.verify(channel1, Mockito.times(1)).setConnectivityChecker(checker);
    Mockito.verify(channel2, Mockito.times(1)).setConnectivityChecker(checker);

    KaaDataChannel channel3 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel3.getTransportProtocolId()).thenReturn(type);
    Mockito.when(channel3.getId()).thenReturn("Channel3");

    channelManager.addChannel(channel3);
    Mockito.verify(channel3, Mockito.times(1)).setConnectivityChecker(checker);
  }

  @Test
  public void testUpdateForSpecifiedTransport() throws NoSuchAlgorithmException, InvalidKeySpecException, KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.BIDIRECTIONAL);
    types.put(TransportType.LOGGING, ChannelDirection.UP);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel.getId()).thenReturn("channel1");

    KaaDataChannel channel2 = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel2.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel2.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel2.getId()).thenReturn("channel2");

    channelManager.addChannel(channel2);
//        assertEquals(channel2, channelManager.getChannelByTransportType(TransportType.LOGGING));
//        assertEquals(channel2, channelManager.getChannelByTransportType(TransportType.CONFIGURATION));

    channelManager.setChannel(TransportType.LOGGING, channel);
    channelManager.setChannel(TransportType.LOGGING, null);

//        assertEquals(channel, channelManager.getChannelByTransportType(TransportType.LOGGING));
//        assertEquals(channel2, channelManager.getChannelByTransportType(TransportType.CONFIGURATION));

    channelManager.removeChannel(channel2.getId());
//        assertEquals(channel, channelManager.getChannelByTransportType(TransportType.CONFIGURATION));
  }

  @Test(expected = KaaInvalidChannelException.class)
  public void testNegativeUpdateForSpecifiedTransport() throws NoSuchAlgorithmException, InvalidKeySpecException,
      KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.DOWN);
    types.put(TransportType.LOGGING, ChannelDirection.UP);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);

    channelManager.setChannel(TransportType.CONFIGURATION, channel);
  }

  @Test
  public void testShutdown() throws NoSuchAlgorithmException, InvalidKeySpecException, KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.BIDIRECTIONAL);
    types.put(TransportType.LOGGING, ChannelDirection.UP);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel.getId()).thenReturn("channel1");

    channelManager.addChannel(channel);

    channelManager.shutdown();
    channelManager.onServerFailed(null, FailoverStatus.BOOTSTRAP_SERVERS_NA);
    channelManager.onTransportConnectionInfoUpdated(null);
    channelManager.addChannel(null);
    channelManager.setChannel(null, null);
    channelManager.setConnectivityChecker(null);
    Mockito.verify(channel, Mockito.times(1)).shutdown();
  }

  @Test
  public void testPauseAfterAdd() throws NoSuchAlgorithmException, InvalidKeySpecException, KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.BIDIRECTIONAL);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel.getId()).thenReturn("channel1");

    channelManager.addChannel(channel);

    channelManager.pause();
    channelManager.pause();
    Mockito.verify(channel, Mockito.times(1)).pause();
  }

  @Test
  public void testPauseBeforeAdd() throws NoSuchAlgorithmException, InvalidKeySpecException, KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.BIDIRECTIONAL);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel.getId()).thenReturn("channel1");

    channelManager.pause();
    channelManager.addChannel(channel);
    Mockito.verify(channel, Mockito.times(1)).pause();
  }

  @Test
  public void testPauseBeforeSet() throws NoSuchAlgorithmException, InvalidKeySpecException, KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.BIDIRECTIONAL);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel.getId()).thenReturn("channel1");

    channelManager.pause();
    channelManager.setChannel(TransportType.CONFIGURATION, channel);
    Mockito.verify(channel, Mockito.times(1)).pause();
  }

  @Test
  public void testResume() throws NoSuchAlgorithmException, InvalidKeySpecException, KaaInvalidChannelException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = getDefaultBootstrapServers();

    BootstrapManager bootstrapManager = Mockito.mock(BootstrapManager.class);
    DefaultChannelManager channelManager = new DefaultChannelManager(bootstrapManager, bootststrapServers, null, null);

    Map<TransportType, ChannelDirection> types = new HashMap<TransportType, ChannelDirection>();
    types.put(TransportType.CONFIGURATION, ChannelDirection.BIDIRECTIONAL);
    KaaDataChannel channel = Mockito.mock(KaaDataChannel.class);
    Mockito.when(channel.getTransportProtocolId()).thenReturn(TransportProtocolIdConstants.TCP_TRANSPORT_ID);
    Mockito.when(channel.getSupportedTransportTypes()).thenReturn(types);
    Mockito.when(channel.getId()).thenReturn("channel1");

    channelManager.pause();
    channelManager.addChannel(channel);
    channelManager.resume();
    Mockito.verify(channel, Mockito.times(1)).pause();
    Mockito.verify(channel, Mockito.times(1)).resume();
  }

  private Map<TransportProtocolId, List<TransportConnectionInfo>> getDefaultBootstrapServers() throws NoSuchAlgorithmException {
    Map<TransportProtocolId, List<TransportConnectionInfo>> bootststrapServers = new HashMap<>();
    TransportConnectionInfo server = IpTransportInfoTest.createTestServerInfo(
            ServerType.BOOTSTRAP, TransportProtocolIdConstants.HTTP_TRANSPORT_ID, "localhost", 9889, KeyUtil.generateKeyPair().getPublic());
    bootststrapServers.put(TransportProtocolIdConstants.HTTP_TRANSPORT_ID, Collections.singletonList(server));
    return bootststrapServers;
  }

}