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   1 /**
   2  * Copyright (c) 2010-2021 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.junit.jupiter.api.Test;
  26 import org.openhab.binding.network.internal.dhcp.DHCPPacket.BadPacketException;
  27
  28 /**
  29  * Tests cases for DHCP related functionality
  30  *
  31  * @author David Graeff - Initial contribution
  32  */
  33 public class DHCPTest {
  34     @Test
  35     public void testService() throws SocketException {
  36         String testIP = "10.1.2.3";
  37         IPRequestReceivedCallback dhcpListener = mock(IPRequestReceivedCallback.class);
  38
  39         // if this is not the case this test is not very useful, we don't always have the static field under control.
  40         assumeTrue(DHCPListenService.instance == null);
  41         DHCPListenService.register(testIP, dhcpListener);
  42         assertThat(DHCPListenService.instance, is(notNullValue()));
  43         DHCPListenService.unregister(testIP);
  44         assertThat(DHCPListenService.instance, is(nullValue()));
  45     }
  46
  47     @Test
  48     public void testReceivePacketCallback() throws BadPacketException, IOException {
  49         String testIP = "10.1.2.3";
  50         InetAddress testAddress = InetAddress.getByName(testIP);
  51         IPRequestReceivedCallback dhcpListener = mock(IPRequestReceivedCallback.class);
  52         DHCPPacketListenerServer s = new DHCPPacketListenerServer(dhcpListener);
  53         s.receivePacket(new DHCPPacket(new byte[] { DHCPPacket.DHCPREQUEST }, testAddress.getAddress()), testAddress);
  54         // Test case if DHCP packet does not contain a DHO_DHCP_REQUESTED_ADDRESS option.
  55         // The destination IP should be deducted by the UDP address in this case
  56         s.receivePacket(new DHCPPacket(new byte[] { DHCPPacket.DHCPREQUEST }, null), testAddress);
  57         verify(dhcpListener, times(2)).dhcpRequestReceived(eq(testIP));
  58     }
  59 }