diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/DdPacketTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/DdPacketTest.java
new file mode 100644
index 0000000..6b7ead0
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/DdPacketTest.java
@@ -0,0 +1,449 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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.onosproject.ospf.protocol.ospfpacket.types;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.protocol.lsa.LsaHeader;
+import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader;
+import org.onosproject.ospf.protocol.ospfpacket.OspfPacketHeader;
+import org.onosproject.ospf.protocol.util.OspfPacketType;
+
+import java.util.List;
+import java.util.Vector;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+/**
+ * Unit test class for OspfRouterId.
+ */
+public class DdPacketTest {
+
+    private byte[] packet;
+    private byte[] result2;
+    private DdPacket ddPacket;
+    private Vector<LsaHeader> lsaHeaderList = new Vector<LsaHeader>();
+    private int result;
+    private long result1;
+    private OpaqueLsaHeader opqueHeader;
+    private OpaqueLsaHeader opqueHeader1;
+    private List<LsaHeader> header;
+    private OspfPacketHeader ospfPacketHeader;
+    private ChannelBuffer channelBuffer;
+    private LsaHeader lsaHeader;
+    private long result3;
+    private OspfPacketType ospfPacketType;
+
+    @Before
+    public void setUp() throws Exception {
+        ddPacket = new DdPacket();
+        ddPacket.setAuthType(1);
+        ddPacket.setOspftype(2);
+        ddPacket.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        ddPacket.setAreaId(Ip4Address.valueOf("10.226.165.100"));
+        ddPacket.setChecksum(201);
+        ddPacket.setAuthentication(2);
+        ddPacket.setOspfPacLength(48);
+        ddPacket.setOspfVer(2);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        ddPacket = null;
+        lsaHeaderList.clear();
+        opqueHeader = null;
+        opqueHeader1 = null;
+        header = null;
+        ospfPacketHeader = null;
+        channelBuffer = null;
+        lsaHeader = null;
+        ospfPacketType = null;
+    }
+
+    /**
+     * Tests isOpaqueCapable() getter method.
+     */
+    @Test
+    public void testIsOpaqueCapable() throws Exception {
+        ddPacket.setIsOpaqueCapable(true);
+        assertThat(ddPacket.isOpaqueCapable(), is(true));
+    }
+
+    /**
+     * Tests isOpaqueCapable() setter method.
+     */
+    @Test
+    public void testSetIsOpaqueCapable() throws Exception {
+        ddPacket.setIsOpaqueCapable(true);
+        assertThat(ddPacket.isOpaqueCapable(), is(true));
+    }
+
+    /**
+     * Tests ims() getter method.
+     */
+    @Test
+    public void testGetIms() throws Exception {
+        ddPacket.setIms(1);
+        result = ddPacket.ims();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(1));
+    }
+
+    /**
+     * Tests ims() setter method.
+     */
+    @Test
+    public void testSetIms() throws Exception {
+        ddPacket.setIms(1);
+        result = ddPacket.ims();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(1));
+    }
+
+    /**
+     * Tests isMaster() getter method.
+     */
+    @Test
+    public void testGetIsMaster() throws Exception {
+        ddPacket.setIsMaster(2);
+        result = ddPacket.isMaster();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(2));
+    }
+
+    /**
+     * Tests isMaster() setter method.
+     */
+    @Test
+    public void testSetIsMaster() throws Exception {
+        ddPacket.setIsMaster(2);
+        result = ddPacket.isMaster();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(2));
+    }
+
+    /**
+     * Tests isInitialize() getter method.
+     */
+    @Test
+    public void testGetIsInitialize() throws Exception {
+        ddPacket.setIsInitialize(3);
+        result = ddPacket.isInitialize();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(3));
+    }
+
+    /**
+     * Tests isInitialize() setter method.
+     */
+    @Test
+    public void testSetIsInitialize() throws Exception {
+        ddPacket.setIsInitialize(3);
+        int result = ddPacket.isInitialize();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(3));
+    }
+
+    /**
+     * Tests isMore() getter method.
+     */
+    @Test
+    public void testGetIsMore() throws Exception {
+        ddPacket.setIsMore(4);
+        result = ddPacket.isMore();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(4));
+    }
+
+    /**
+     * Tests isMore() setter method.
+     */
+    @Test
+    public void testSetIsMore() throws Exception {
+        ddPacket.setIsMore(4);
+        int result = ddPacket.isMore();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(4));
+    }
+
+    /**
+     * Tests imtu() getter method.
+     */
+    @Test
+    public void testGetImtu() throws Exception {
+        ddPacket.setImtu(5);
+        result = ddPacket.imtu();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(5));
+    }
+
+    /**
+     * Tests imtu() setter method.
+     */
+    @Test
+    public void testSetImtu() throws Exception {
+        ddPacket.setImtu(5);
+        result = ddPacket.imtu();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(5));
+    }
+
+    /**
+     * Tests options() getter method.
+     */
+    @Test
+    public void testGetOptions() throws Exception {
+        ddPacket.setOptions(2);
+        result = ddPacket.options();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(2));
+    }
+
+    /**
+     * Tests options() setter method.
+     */
+    @Test
+    public void testSetOptions() throws Exception {
+        ddPacket.setOptions(2);
+        result = ddPacket.options();
+        Assert.assertNotNull(result);
+        Assert.assertEquals(2, result);
+    }
+
+    /**
+     * Tests sequenceNo() getter method.
+     */
+    @Test
+    public void testGetSequenceno() throws Exception {
+        ddPacket.setSequenceNo(2020);
+        result1 = ddPacket.sequenceNo();
+        assertThat(result1, is(notNullValue()));
+        assertThat(result1, is(2020L));
+    }
+
+    /**
+     * Tests sequenceNo() setter method.
+     */
+    @Test
+    public void testSetSequenceno() throws Exception {
+        ddPacket.setSequenceNo(2020);
+        result3 = ddPacket.sequenceNo();
+        assertThat(result3, is(notNullValue()));
+        assertThat(result3, is(2020L));
+    }
+
+    /**
+     * Tests getLsaHeaderList() getter method.
+     */
+    @Test
+    public void testGetLsaHeaderList() throws Exception {
+        ddPacket.addLsaHeader(createLsaHeader());
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(9);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(9);
+        opqueHeader.setOpaqueType(9);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(2);
+        ddPacket.setIsOpaqueCapable(true);
+        ddPacket.addLsaHeader(opqueHeader);
+        opqueHeader1 = new OpaqueLsaHeader();
+        opqueHeader1.setLsType(10);
+        opqueHeader1.setLsPacketLen(48);
+        opqueHeader1.setLsCheckSum(10);
+        opqueHeader1.setAge(4);
+        opqueHeader1.setOpaqueId(9);
+        opqueHeader1.setOpaqueType(9);
+        opqueHeader1.setLsSequenceNo(250);
+        opqueHeader1.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader1.setOptions(66);
+        ddPacket.addLsaHeader(opqueHeader1);
+        header = ddPacket.getLsaHeaderList();
+        assertThat(header, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsaHeaderList() setter method.
+     */
+    @Test
+    public void testSetLsaHeaderList() throws Exception {
+        ddPacket.addLsaHeader(createLsaHeader());
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(9);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(9);
+        opqueHeader.setOpaqueType(9);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(66);
+        ddPacket.addLsaHeader(opqueHeader);
+        opqueHeader1 = new OpaqueLsaHeader();
+        opqueHeader1.setLsType(10);
+        opqueHeader1.setLsPacketLen(48);
+        opqueHeader1.setLsCheckSum(10);
+        opqueHeader1.setAge(4);
+        opqueHeader1.setOpaqueId(9);
+        opqueHeader1.setOpaqueType(9);
+        opqueHeader1.setLsSequenceNo(250);
+        opqueHeader1.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader1.setOptions(2);
+        ddPacket.addLsaHeader(opqueHeader1);
+        header = ddPacket.getLsaHeaderList();
+        assertThat(header.contains(createLsaHeader()), is(true));
+    }
+
+    /**
+     * Tests addLsaHeader() method.
+     */
+    @Test
+    public void testAddLsaHeader() throws Exception {
+        ddPacket.addLsaHeader(createLsaHeader());
+        assertThat(ddPacket, is(notNullValue()));
+    }
+
+    /**
+     * Tests ospfMessageType() getter method.
+     */
+    @Test
+    public void testGetOspfMessageType() throws Exception {
+        ospfPacketType = ddPacket.ospfMessageType();
+        assertThat(ospfPacketType, is(notNullValue()));
+        assertThat(ospfPacketType, is(OspfPacketType.DD));
+    }
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test
+    public void testReadFrom() throws Exception {
+        ospfPacketHeader = new OspfPacketHeader();
+        ospfPacketHeader.setAreaId(Ip4Address.valueOf("1.1.1.1"));
+        ospfPacketHeader.setAuthentication(0);
+        ospfPacketHeader.setAuthType(0);
+        ospfPacketHeader.setChecksum(12345);
+        ospfPacketHeader.setDestinationIp(Ip4Address.valueOf("10.10.10.10"));
+        ospfPacketHeader.setOspfPacLength(56);
+        ospfPacketHeader.setOspftype(2);
+        ospfPacketHeader.setOspfVer(2);
+        ospfPacketHeader.setRouterId(Ip4Address.valueOf("2.2.2.2"));
+        ospfPacketHeader.setSourceIp(Ip4Address.valueOf("3.3.3.3"));
+        ddPacket.setIsOpaqueCapable(true);
+        ddPacket.setOptions(66);
+        ddPacket = new DdPacket(ospfPacketHeader);
+        packet = createByteForDdPacket();
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        ddPacket.readFrom(channelBuffer);
+        assertThat(ddPacket, is(notNullValue()));
+        assertThat(ddPacket.ospfMessageType(), is(OspfPacketType.DD));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test
+    public void testAsBytes() throws Exception {
+        result2 = ddPacket.asBytes();
+        assertThat(result2, is(notNullValue()));
+    }
+
+    /**
+     * Tests getDdHeaderAsByteArray() method.
+     */
+    @Test
+    public void testGetDdHeaderAsByteArray() throws Exception {
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(9);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(9);
+        opqueHeader.setOpaqueType(9);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(66);
+        ddPacket.addLsaHeader(opqueHeader);
+        opqueHeader1 = new OpaqueLsaHeader();
+        opqueHeader1.setLsType(10);
+        opqueHeader1.setLsPacketLen(48);
+        opqueHeader1.setLsCheckSum(10);
+        opqueHeader1.setAge(4);
+        opqueHeader1.setOpaqueId(9);
+        opqueHeader1.setOpaqueType(9);
+        opqueHeader1.setLsSequenceNo(250);
+        opqueHeader1.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader1.setOptions(2);
+        ddPacket.addLsaHeader(opqueHeader1);
+        result2 = ddPacket.getDdHeaderAsByteArray();
+        assertThat(result2, is(notNullValue()));
+    }
+
+    /**
+     * Tests getDdBodyAsByteArray() method.
+     */
+    @Test
+    public void testGetDdBodyAsByteArray() throws Exception {
+        lsaHeader = createLsaHeader();
+        ddPacket.addLsaHeader(lsaHeader);
+        result2 = ddPacket.getDdBodyAsByteArray();
+        assertThat(result2, is(notNullValue()));
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        assertThat(ddPacket.toString(), is(notNullValue()));
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private LsaHeader createLsaHeader() {
+        lsaHeader = new LsaHeader();
+        lsaHeader.setAge(10);
+        lsaHeader.setLinkStateId("10.226.165.164");
+        lsaHeader.setLsCheckSum(222);
+        lsaHeader.setLsPacketLen(48);
+        lsaHeader.setLsSequenceNo(2020);
+        lsaHeader.setLsType(2);
+        lsaHeader.setOptions(2);
+        lsaHeader.setAdvertisingRouter(Ip4Address.valueOf("10.226.165.165"));
+        return lsaHeader;
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private byte[] createByteForDdPacket() {
+        byte[] ddPacket = {5, -36, 66, 1, 65, 119, -87, 126, 0, 23, 2, 1, 10, 10,
+                10, 10, 10, 10, 10, 10, -128, 0, 0, 6, -69, 26, 0, 36};
+
+        return ddPacket;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/HelloPacketTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/HelloPacketTest.java
new file mode 100644
index 0000000..8d8b0f6
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/HelloPacketTest.java
@@ -0,0 +1,325 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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.onosproject.ospf.protocol.ospfpacket.types;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.protocol.ospfpacket.OspfPacketHeader;
+import org.onosproject.ospf.protocol.util.OspfPacketType;
+
+import java.util.Vector;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Unit test class for HelloPacket.
+ */
+public class HelloPacketTest {
+
+    private boolean result1;
+    private OspfPacketType ospfPacketType;
+    private OspfPacketHeader ospfPacketHeader;
+    private HelloPacket helloPacket;
+    private Vector<String> neighborAddress = new Vector();
+    private Ip4Address result;
+    private int result2;
+    private byte[] packet;
+    private ChannelBuffer channelBuffer;
+    private byte[] result3;
+
+    @Before
+    public void setUp() throws Exception {
+        helloPacket = new HelloPacket();
+        helloPacket.setAuthType(1);
+        helloPacket.setOspftype(2);
+        helloPacket.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        helloPacket.setAreaId(Ip4Address.valueOf("10.226.165.100"));
+        helloPacket.setChecksum(201);
+        helloPacket.setAuthentication(2);
+        helloPacket.setOspfPacLength(48);
+        helloPacket.setOspfVer(2);
+
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        helloPacket = null;
+        result = null;
+        ospfPacketType = null;
+        ospfPacketHeader = null;
+        packet = null;
+        channelBuffer = null;
+        result3 = null;
+    }
+
+    /**
+     * Tests networkMask() getter method.
+     */
+    @Test
+    public void testGetNetworkMask() throws Exception {
+        helloPacket.setNetworkMask(Ip4Address.valueOf("10.226.165.164"));
+        result = helloPacket.networkMask();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(Ip4Address.valueOf("10.226.165.164")));
+    }
+
+    /**
+     * Tests networkMask() setter method.
+     */
+    @Test
+    public void testSetNetworkMask() throws Exception {
+        helloPacket.setNetworkMask(Ip4Address.valueOf("10.226.165.164"));
+        result = helloPacket.networkMask();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(Ip4Address.valueOf("10.226.165.164")));
+    }
+
+    /**
+     * Tests bdr() setter method.
+     */
+    @Test
+    public void testSetBdr() throws Exception {
+        helloPacket.setBdr(Ip4Address.valueOf("10.226.165.166"));
+        result = helloPacket.bdr();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(Ip4Address.valueOf("10.226.165.166")));
+    }
+
+    /**
+     * Tests dr() getter method.
+     */
+    @Test
+    public void testGetDr() throws Exception {
+        helloPacket.setDr(Ip4Address.valueOf("10.226.165.167"));
+        result = helloPacket.dr();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(Ip4Address.valueOf("10.226.165.167")));
+    }
+
+    /**
+     * Tests dr() setter method.
+     */
+    @Test
+    public void testSetDr() throws Exception {
+        helloPacket.setDr(Ip4Address.valueOf("10.226.165.167"));
+        result = helloPacket.dr();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(Ip4Address.valueOf("10.226.165.167")));
+    }
+
+    /**
+     * Tests addNeighbor() method.
+     */
+    @Test
+    public void testAddNeighbor() throws Exception {
+        helloPacket.addNeighbor(Ip4Address.valueOf("10.226.165.170"));
+        result1 = helloPacket.containsNeighbour(Ip4Address.valueOf("10.226.165.170"));
+        assertThat(result1, is(true));
+    }
+
+    /**
+     * Tests containsNeighbour() method.
+     */
+    @Test
+    public void testContainsNeighbour() throws Exception {
+        helloPacket.addNeighbor(Ip4Address.valueOf("10.226.165.200"));
+        result1 = helloPacket.containsNeighbour(Ip4Address.valueOf("10.226.165.200"));
+        assertThat(result1, is(true));
+    }
+
+
+    /**
+     * Tests options() getter  method.
+     */
+    @Test
+    public void testGetOptions() throws Exception {
+        helloPacket.setOptions(10);
+        result2 = helloPacket.options();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(10));
+    }
+
+    /**
+     * Tests options() setter  method.
+     */
+    @Test
+    public void testSetOptions() throws Exception {
+        helloPacket.setOptions(11);
+        result2 = helloPacket.options();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(11));
+    }
+
+    /**
+     * Tests routerPriority() getter  method.
+     */
+    @Test
+    public void testGetRouterPriority() throws Exception {
+        helloPacket.setRouterPriority(1);
+        result2 = helloPacket.routerPriority();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(1));
+    }
+
+    /**
+     * Tests routerPriority() setter  method.
+     */
+    @Test
+    public void testSetRouterPriority() throws Exception {
+        helloPacket.setRouterPriority(2);
+        result2 = helloPacket.routerPriority();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(2));
+    }
+
+    /**
+     * Tests helloInterval() getter  method.
+     */
+    @Test
+    public void testGetHelloInterval() throws Exception {
+        helloPacket.setHelloInterval(10);
+        result2 = helloPacket.helloInterval();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(10));
+    }
+
+    /**
+     * Tests helloInterval() setter  method.
+     */
+    @Test
+    public void testSetHelloInterval() throws Exception {
+        helloPacket.setHelloInterval(10);
+        result2 = helloPacket.helloInterval();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(10));
+    }
+
+    /**
+     * Tests routerDeadInterval() getter  method.
+     */
+    @Test
+    public void testGetRouterDeadInterval() throws Exception {
+        helloPacket.setRouterDeadInterval(50);
+        result2 = helloPacket.routerDeadInterval();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(50));
+    }
+
+    /**
+     * Tests routerDeadInterval() setter  method.
+     */
+    @Test
+    public void testSetRouterDeadInterval() throws Exception {
+        helloPacket.setRouterDeadInterval(50);
+        result2 = helloPacket.routerDeadInterval();
+        assertThat(result2, is(notNullValue()));
+        assertThat(result2, is(50));
+    }
+
+    /**
+     * Tests ospfMessageType() getter  method.
+     */
+    @Test
+    public void testGetOspfMessageType() throws Exception {
+        ospfPacketType = helloPacket.ospfMessageType();
+        assertThat(ospfPacketType, is(notNullValue()));
+        assertThat(ospfPacketType, is(OspfPacketType.HELLO));
+    }
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test
+    public void testReadFrom() throws Exception {
+        ospfPacketHeader = new OspfPacketHeader();
+        ospfPacketHeader.setAreaId(Ip4Address.valueOf("1.1.1.1"));
+        ospfPacketHeader.setAuthentication(0);
+        ospfPacketHeader.setAuthType(0);
+        ospfPacketHeader.setChecksum(12345);
+        ospfPacketHeader.setDestinationIp(Ip4Address.valueOf("10.10.10.10"));
+        ospfPacketHeader.setOspfPacLength(56);
+        ospfPacketHeader.setOspftype(1);
+        ospfPacketHeader.setOspfVer(2);
+        ospfPacketHeader.setRouterId(Ip4Address.valueOf("2.2.2.2"));
+        ospfPacketHeader.setSourceIp(Ip4Address.valueOf("3.3.3.3"));
+        packet = createByteForHelloPacket();
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        helloPacket.readFrom(channelBuffer);
+        assertThat(helloPacket, is(notNullValue()));
+        assertThat(helloPacket.ospfMessageType(), is(OspfPacketType.HELLO));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test
+    public void testAsBytes() throws Exception {
+        result3 = helloPacket.asBytes();
+        assertThat(result3, is(notNullValue()));
+    }
+
+    /**
+     * Tests getHelloHeaderAsByteArray() method.
+     */
+    @Test
+    public void testGetHelloHeaderAsByteArray() throws Exception {
+        result3 = helloPacket.getHelloHeaderAsByteArray();
+        assertThat(result3, is(notNullValue()));
+    }
+
+    /**
+     * Tests getHelloBodyAsByteArray() method.
+     */
+    @Test
+    public void testGetHelloBodyAsByteArray() throws Exception {
+        neighborAddress.add("10.226.165.100");
+        result3 = helloPacket.getHelloBodyAsByteArray();
+        assertThat(result3, is(notNullValue()));
+    }
+
+    /**
+     * Tests getHelloBodyAsByteArray() method.
+     */
+    @Test
+    public void testReadHelloBody() throws Exception {
+        helloPacket.getHelloBodyAsByteArray();
+        assertThat(helloPacket, is(notNullValue()));
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        assertThat(helloPacket.toString(), is(notNullValue()));
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private byte[] createByteForHelloPacket() {
+        byte[] helloPacket = {2, 1, 0, 44, -64, -88, -86, 8, 0, 0, 0, 1, 39, 59, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, -1, -1, -1, 0, 0, 10, 2, 1, 0, 0, 0, 40, -64, -88, -86, 8, 0, 0, 0, 0};
+
+        return helloPacket;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsAcknowledgeTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsAcknowledgeTest.java
new file mode 100644
index 0000000..dd5af91
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsAcknowledgeTest.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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.onosproject.ospf.protocol.ospfpacket.types;
+
+import org.hamcrest.MatcherAssert;
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.protocol.lsa.LsaHeader;
+import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader;
+import org.onosproject.ospf.protocol.ospfpacket.OspfPacketHeader;
+import org.onosproject.ospf.protocol.util.OspfPacketType;
+
+import java.util.List;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Unit test class for LsAck.
+ */
+public class LsAcknowledgeTest {
+
+    private LsaHeader lsaHeader;
+    private LsAcknowledge lsAck;
+    private OspfPacketType ospfPacketType;
+    private OspfPacketHeader ospfPacketHeader;
+    private byte[] result;
+    private ChannelBuffer channelBuffer;
+    private OpaqueLsaHeader opaqueLsaHeader;
+
+    @Before
+    public void setUp() throws Exception {
+        lsaHeader = new LsaHeader();
+        lsAck = new LsAcknowledge();
+        lsAck.setAuthType(1);
+        lsAck.setOspftype(5);
+        lsAck.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        lsAck.setAreaId(Ip4Address.valueOf("10.226.165.100"));
+        lsAck.setChecksum(201);
+        lsAck.setAuthentication(2);
+        lsAck.setOspfPacLength(48);
+        lsAck.setOspfVer(2);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        lsaHeader = null;
+        lsAck = null;
+        ospfPacketType = null;
+        ospfPacketHeader = null;
+        result = null;
+        channelBuffer = null;
+        opaqueLsaHeader = null;
+    }
+
+    /**
+     * Tests getLinkStateHeaders() getter method.
+     */
+    @Test
+    public void testGetLinkStateHeaders() throws Exception {
+        lsaHeader = createLsaHeader();
+        lsAck.addLinkStateHeader(lsaHeader);
+        lsAck.addLinkStateHeader(lsaHeader);
+        List headers = lsAck.getLinkStateHeaders();
+        assertThat(headers.size(), is(1));
+
+    }
+
+    /**
+     * Tests addLinkStateHeader() method.
+     */
+    @Test
+    public void testAddLinkStateHeader() throws Exception {
+        lsaHeader = createLsaHeader();
+        lsAck.addLinkStateHeader(lsaHeader);
+        lsAck.addLinkStateHeader(lsaHeader);
+        assertThat(lsAck, is(notNullValue()));
+    }
+
+
+    /**
+     * Tests ospfMessageType() getter method.
+     */
+    @Test
+    public void testGetOSPFMessageType() throws Exception {
+        ospfPacketType = lsAck.ospfMessageType();
+        assertThat(ospfPacketType, is(notNullValue()));
+        assertThat(ospfPacketType, is(OspfPacketType.LSAACK));
+    }
+
+    /**
+     * Tests ospfMessageType() getter method.
+     */
+    @Test
+    public void testGetOspfMessageType() throws Exception {
+        ospfPacketType = lsAck.ospfMessageType();
+        assertThat(ospfPacketType, is(notNullValue()));
+        assertThat(ospfPacketType, is(OspfPacketType.LSAACK));
+    }
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test
+    public void testReadFrom() throws Exception {
+        ospfPacketHeader = new OspfPacketHeader();
+        ospfPacketHeader.setAreaId(Ip4Address.valueOf("1.1.1.1"));
+        ospfPacketHeader.setAuthentication(0);
+        ospfPacketHeader.setAuthType(0);
+        ospfPacketHeader.setChecksum(12345);
+        ospfPacketHeader.setDestinationIp(Ip4Address.valueOf("10.10.10.10"));
+        ospfPacketHeader.setOspfPacLength(56);
+        ospfPacketHeader.setOspftype(5);
+        ospfPacketHeader.setOspfVer(2);
+        ospfPacketHeader.setRouterId(Ip4Address.valueOf("2.2.2.2"));
+        ospfPacketHeader.setSourceIp(Ip4Address.valueOf("3.3.3.3"));
+        result = createByteForLSAck();
+        lsAck = new LsAcknowledge(ospfPacketHeader);
+        channelBuffer = ChannelBuffers.copiedBuffer(result);
+        lsAck.readFrom(channelBuffer);
+        assertThat(lsAck, is(notNullValue()));
+        assertThat(lsAck.ospfMessageType(), is(OspfPacketType.LSAACK));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test
+    public void testAsBytes() throws Exception {
+        result = lsAck.asBytes();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsAckAsByteArray() method.
+     */
+    @Test
+    public void testGetLsAckAsByteArray() throws Exception {
+        result = lsAck.getLsAckAsByteArray();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsAckBodyAsByteArray() method.
+     */
+    @Test
+    public void testGetLsAckBodyAsByteArray() throws Exception {
+        lsaHeader = createLsaHeader();
+        opaqueLsaHeader = new OpaqueLsaHeader();
+        lsAck.addLinkStateHeader(lsaHeader);
+        lsAck.addLinkStateHeader(opaqueLsaHeader);
+        result = lsAck.getLsAckBodyAsByteArray();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        MatcherAssert.assertThat(lsAck.toString(), is(notNullValue()));
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private LsaHeader createLsaHeader() {
+        lsaHeader = new LsaHeader();
+        lsaHeader.setAge(10);
+        lsaHeader.setLinkStateId("10.226.165.164");
+        lsaHeader.setLsCheckSum(222);
+        lsaHeader.setLsPacketLen(48);
+        lsaHeader.setLsSequenceNo(2020);
+        lsaHeader.setLsType(5);
+        lsaHeader.setOptions(2);
+        lsaHeader.setAdvertisingRouter(Ip4Address.valueOf("10.226.165.165"));
+        return lsaHeader;
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private byte[] createByteForLSAck() {
+        byte[] lsAckPacket = {2, 5, 0, 44, -64, -88, -86, 8, 0, 0, 0, 1, -30,
+                -12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, 16, 2, 1, -64, -88, -86,
+                2, -64, -88, -86, 2, -128, 0, 0, 1, 74, -114, 0, 48};
+
+        return lsAckPacket;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsRequestTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsRequestTest.java
new file mode 100644
index 0000000..41c9c4f
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsRequestTest.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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.onosproject.ospf.protocol.ospfpacket.types;
+
+import org.jboss.netty.buffer.ChannelBuffer;
+import org.jboss.netty.buffer.ChannelBuffers;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.protocol.ospfpacket.OspfPacketHeader;
+import org.onosproject.ospf.protocol.ospfpacket.subtype.LsRequestPacket;
+import org.onosproject.ospf.protocol.util.OspfPacketType;
+
+import java.net.UnknownHostException;
+import java.util.List;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Unit test class for LsRequest.
+ */
+public class LsRequestTest {
+
+    private LsRequest lsRequest;
+    private List<LsRequestPacket> result;
+    private OspfPacketType ospfMessageType;
+    private OspfPacketHeader ospfPacketHeader;
+    private byte[] result1;
+    private String result2;
+    private ChannelBuffer channelBuffer;
+    private LsRequestPacket lsRequestPacket;
+
+    @Before
+    public void setUp() throws Exception {
+        lsRequest = new LsRequest();
+        lsRequest.setAuthType(1);
+        lsRequest.setOspftype(3);
+        lsRequest.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        lsRequest.setAreaId(Ip4Address.valueOf("10.226.165.163"));
+        lsRequest.setChecksum(201);
+        lsRequest.setAuthentication(2);
+        lsRequest.setOspfPacLength(48);
+        lsRequest.setOspfVer(2);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        lsRequest = null;
+        result = null;
+        ospfMessageType = null;
+        ospfPacketHeader = null;
+        result1 = null;
+        channelBuffer = null;
+        lsRequestPacket = null;
+    }
+
+    /**
+     * Tests addLinkStateRequests() method.
+     */
+    @Test
+    public void testAddLinkStateRequests() throws Exception {
+        lsRequest.addLinkStateRequests(createLsRequestPacket());
+        result = lsRequest.getLinkStateRequests();
+        assertThat(result, is(notNullValue()));
+        assertThat(result.size(), is(1));
+    }
+
+    /**
+     * Tests getLinkStateRequests() method.
+     */
+    @Test
+    public void testGetLinkStateRequests() throws Exception {
+        lsRequest.addLinkStateRequests(createLsRequestPacket());
+        lsRequest.addLinkStateRequests(new LsRequestPacket());
+        result = lsRequest.getLinkStateRequests();
+        assertThat(result, is(notNullValue()));
+        assertThat(result.size(), is(2));
+    }
+
+    /**
+     * Tests ospfMessageType()getter  method.
+     */
+    @Test
+    public void testGetOspfMessageType() throws Exception {
+        ospfMessageType = lsRequest.ospfMessageType();
+        assertThat(ospfMessageType, is(notNullValue()));
+        assertThat(ospfMessageType, is(OspfPacketType.LSREQUEST));
+    }
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test
+    public void testReadFrom() throws Exception {
+        ospfPacketHeader = new OspfPacketHeader();
+        ospfPacketHeader.setAreaId(Ip4Address.valueOf("1.1.1.1"));
+        ospfPacketHeader.setAuthentication(0);
+        ospfPacketHeader.setAuthType(0);
+        ospfPacketHeader.setChecksum(12345);
+        ospfPacketHeader.setDestinationIp(Ip4Address.valueOf("10.10.10.10"));
+        ospfPacketHeader.setOspfPacLength(56);
+        ospfPacketHeader.setOspftype(3);
+        ospfPacketHeader.setOspfVer(2);
+        ospfPacketHeader.setRouterId(Ip4Address.valueOf("2.2.2.2"));
+        ospfPacketHeader.setSourceIp(Ip4Address.valueOf("3.3.3.3"));
+        lsRequest = new LsRequest(ospfPacketHeader);
+        result1 = createByteLsReqestPacket();
+        channelBuffer = ChannelBuffers.copiedBuffer(result1);
+        lsRequest.readFrom(channelBuffer);
+        assertThat(lsRequest, is(notNullValue()));
+        assertThat(lsRequest.ospfMessageType(), is(OspfPacketType.LSREQUEST));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test
+    public void testAsBytes() throws Exception {
+        result1 = lsRequest.asBytes();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsrHeaderAsByteArray() method.
+     */
+    @Test
+    public void testGetLsrHeaderAsByteArray() throws Exception {
+        result1 = lsRequest.getLsrHeaderAsByteArray();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsrBodyAsByteArray() method.
+     */
+    @Test
+    public void testGetLsrBodyAsByteArray() throws Exception {
+        lsRequest.addLinkStateRequests(createLsRequestPacket());
+        lsRequest.addLinkStateRequests(new LsRequestPacket());
+        result1 = lsRequest.getLsrBodyAsByteArray();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        result2 = lsRequest.toString();
+        assertThat(result2, is(notNullValue()));
+    }
+
+    private LsRequestPacket createLsRequestPacket() throws UnknownHostException {
+        lsRequestPacket = new LsRequestPacket();
+        lsRequestPacket.setOwnRouterId("165");
+        lsRequestPacket.setLinkStateId("10.226.165.164");
+        lsRequestPacket.setLsType(2);
+        return lsRequestPacket;
+    }
+
+    private byte[] createByteLsReqestPacket() {
+        byte[] lsRequestPacket = {2, 3, 0, 36, -64, -88, -86, 3, 0, 0, 0, 1, -67,
+                -57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -64, -88, -86, 8,
+                -64, -88, -86, 8};
+        return lsRequestPacket;
+    }
+}
\ No newline at end of file