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   1 /**
   2  * Copyright (c) 2010-2022 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.network.internal.dhcp;
  14
  15 import static org.hamcrest.CoreMatchers.*;
  16 import static org.hamcrest.MatcherAssert.assertThat;
  17 import static org.junit.jupiter.api.Assumptions.assumeTrue;
  18 import static org.mockito.ArgumentMatchers.eq;
  19 import static org.mockito.Mockito.*;
  20
  21 import java.io.IOException;
  22 import java.net.InetAddress;
  23 import java.net.SocketException;
  24
  25 import org.eclipse.jdt.annotation.NonNullByDefault;
  26 import org.junit.jupiter.api.Test;
  27 import org.openhab.binding.network.internal.dhcp.DHCPPacket.BadPacketException;
  28
  29 /**
  30  * Tests cases for DHCP related functionality
  31  *
  32  * @author David Graeff - Initial contribution
  33  */
  34 @NonNullByDefault
  35 public class DHCPTest {
  36     @Test
  37     public void testService() throws SocketException {
  38         String testIP = "10.1.2.3";
  39         IPRequestReceivedCallback dhcpListener = mock(IPRequestReceivedCallback.class);
  40
  41         // if this is not the case this test is not very useful, we don't always have the static field under control.
  42         assumeTrue(DHCPListenService.instance == null);
  43         DHCPListenService.register(testIP, dhcpListener);
  44         assertThat(DHCPListenService.instance, is(notNullValue()));
  45         DHCPListenService.unregister(testIP);
  46         assertThat(DHCPListenService.instance, is(nullValue()));
  47     }
  48
  49     @Test
  50     public void testReceivePacketCallback() throws BadPacketException, IOException {
  51         String testIP = "10.1.2.3";
  52         InetAddress testAddress = InetAddress.getByName(testIP);
  53         IPRequestReceivedCallback dhcpListener = mock(IPRequestReceivedCallback.class);
  54         DHCPPacketListenerServer s = new DHCPPacketListenerServer(dhcpListener);
  55         s.receivePacket(new DHCPPacket(new byte[] { DHCPPacket.DHCPREQUEST }, testAddress.getAddress()), testAddress);
  56         // Test case if DHCP packet does not contain a DHO_DHCP_REQUESTED_ADDRESS option.
  57         // The destination IP should be deducted by the UDP address in this case
  58         s.receivePacket(new DHCPPacket(new byte[] { DHCPPacket.DHCPREQUEST }, null), testAddress);
  59         verify(dhcpListener, times(2)).dhcpRequestReceived(eq(testIP));
  60     }
  61 }