diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/lsa/types/OpaqueLsa10Test.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/lsa/types/OpaqueLsa10Test.java
new file mode 100644
index 0000000..93254ef
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/lsa/types/OpaqueLsa10Test.java
@@ -0,0 +1,249 @@
+/*
+ * 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.lsa.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.controller.OspfLsaType;
+import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader;
+import org.onosproject.ospf.protocol.lsa.TlvHeader;
+import org.onosproject.ospf.protocol.lsa.tlvtypes.LinkTlv;
+import org.onosproject.ospf.protocol.lsa.tlvtypes.RouterTlv;
+
+
+import java.util.List;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+
+/**
+ * Unit test class for OpaqueLsa10.
+ */
+public class OpaqueLsa10Test {
+
+    private final byte[] packet = {0, 1, 0, 4, 1, 1, 1, 1, 0, 2, 0, 84, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+    private OpaqueLsa10 opaqueLsa10;
+    private TopLevelTlv tlv;
+    private OpaqueLsaHeader opqueHeader;
+    private ChannelBuffer channelBuffer;
+    private byte[] result;
+    private RouterTlv routerTlv;
+    private RouterTlv routerTlv1;
+    private LinkTlv linkTlv;
+    private LinkTlv linkTlv1;
+    private OspfLsaType ospflsaType;
+    private int result1;
+    private List result2;
+
+    @Before
+    public void setUp() throws Exception {
+        opaqueLsa10 = new OpaqueLsa10(new OpaqueLsaHeader());
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        opaqueLsa10 = null;
+        tlv = null;
+        opqueHeader = null;
+        channelBuffer = null;
+        result = null;
+        routerTlv = null;
+        routerTlv1 = null;
+        linkTlv1 = null;
+        ospflsaType = null;
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        assertThat(opaqueLsa10.toString(), is(notNullValue()));
+    }
+
+    /**
+     * Tests addValue() method.
+     */
+    @Test
+    public void testAddValue() throws Exception {
+        tlv = new RouterTlv(new TlvHeader());
+        opaqueLsa10.addValue(tlv);
+        assertThat(opaqueLsa10, is(notNullValue()));
+    }
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test(expected = Exception.class)
+    public void testReadFrom() throws Exception {
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(10);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(1);
+        opqueHeader.setOpaqueType(10);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(66);
+        opaqueLsa10 = new OpaqueLsa10(opqueHeader);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        opaqueLsa10.readFrom(channelBuffer);
+        result = opaqueLsa10.asBytes();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test(expected = Exception.class)
+    public void testAsBytes() throws Exception {
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(10);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(1);
+        opqueHeader.setOpaqueType(10);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(66);
+        opaqueLsa10 = new OpaqueLsa10(opqueHeader);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        opaqueLsa10.readFrom(channelBuffer);
+        result = opaqueLsa10.getLsaBodyAsByteArray();
+        result = opaqueLsa10.asBytes();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsaBodyAsByteArray() method.
+     */
+    @Test(expected = Exception.class)
+    public void testGetLsaBodyAsByteArray() throws Exception {
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(10);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(1);
+        opqueHeader.setOpaqueType(10);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(2);
+        opaqueLsa10 = new OpaqueLsa10(opqueHeader);
+        routerTlv = new RouterTlv(new TlvHeader());
+        linkTlv = new LinkTlv(new TlvHeader());
+        opaqueLsa10.addValue(routerTlv);
+        opaqueLsa10.addValue(linkTlv);
+        routerTlv1 = new RouterTlv(new TlvHeader());
+        linkTlv1 = new LinkTlv(new TlvHeader());
+        opaqueLsa10.addValue(routerTlv1);
+        opaqueLsa10.addValue(linkTlv1);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        opaqueLsa10.readFrom(channelBuffer);
+        result = opaqueLsa10.getLsaBodyAsByteArray();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsaBodyAsByteArray() method.
+     */
+    @Test(expected = Exception.class)
+    public void testGetLsaBodyAsByteArray1() throws Exception {
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(10);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(1);
+        opqueHeader.setOpaqueType(10);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(2);
+        opaqueLsa10 = new OpaqueLsa10(opqueHeader);
+        routerTlv = new RouterTlv(new TlvHeader());
+        opaqueLsa10.addValue(routerTlv);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        result = opaqueLsa10.getLsaBodyAsByteArray();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsaBodyAsByteArray() method.
+     */
+    @Test(expected = Exception.class)
+    public void testGetLsaBodyAsByteArray2() throws Exception {
+        opqueHeader = new OpaqueLsaHeader();
+        opqueHeader.setLsType(10);
+        opqueHeader.setLsPacketLen(48);
+        opqueHeader.setLsCheckSum(10);
+        opqueHeader.setAge(4);
+        opqueHeader.setOpaqueId(1);
+        opqueHeader.setOpaqueType(10);
+        opqueHeader.setLsSequenceNo(250);
+        opqueHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        opqueHeader.setOptions(2);
+        opaqueLsa10 = new OpaqueLsa10(opqueHeader);
+        linkTlv = new LinkTlv(new TlvHeader());
+        opaqueLsa10.addValue(linkTlv);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet);
+        opaqueLsa10.readFrom(channelBuffer);
+        result = opaqueLsa10.getLsaBodyAsByteArray();
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests getOspfLsaType() getter method.
+     */
+    @Test
+    public void testGetOspfLsaType() throws Exception {
+        opaqueLsa10.setLsType(10);
+        ospflsaType = opaqueLsa10.getOspfLsaType();
+        assertThat(ospflsaType, is(notNullValue()));
+        assertThat(ospflsaType, is(OspfLsaType.AREA_LOCAL_OPAQUE_LSA));
+    }
+
+    /**
+     * Tests hashCode() method.
+     */
+    @Test
+    public void testHashcode() throws Exception {
+
+        result1 = opaqueLsa10.hashCode();
+        assertThat(result1, is(notNullValue()));
+
+    }
+
+    /**
+     * Tests topLevelValues() method.
+     */
+    @Test
+    public void testTopLevelValues() throws Exception {
+
+        result2 = opaqueLsa10.topLevelValues();
+        assertThat(result2, is(notNullValue()));
+
+    }
+
+}
\ No newline at end of file
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/lsa/types/RouterLsaTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/lsa/types/RouterLsaTest.java
new file mode 100644
index 0000000..09a3b4d
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/lsa/types/RouterLsaTest.java
@@ -0,0 +1,266 @@
+/*
+ * 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.lsa.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.controller.OspfLsaType;
+import org.onosproject.ospf.protocol.lsa.LsaHeader;
+import org.onosproject.ospf.protocol.lsa.subtypes.OspfLsaLink;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+
+/**
+ * Unit test class for RouterLsa.
+ */
+public class RouterLsaTest {
+
+    private RouterLsa routerLsa;
+    private int result1;
+    private OspfLsaLink ospflsaLink;
+    private byte[] inputArray;
+    private LsaHeader lsaHeader;
+    private ChannelBuffer channelBuffer;
+    private byte[] result2;
+    private OspfLsaType result3;
+
+    @Before
+    public void setUp() throws Exception {
+        routerLsa = new RouterLsa();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        routerLsa = null;
+        ospflsaLink = null;
+        inputArray = null;
+        lsaHeader = null;
+        channelBuffer = null;
+        result2 = null;
+        result3 = null;
+    }
+
+
+    /**
+     * Tests virtualEndPoint() setter method.
+     */
+    @Test
+    public void testSetVirtualEndPoint() throws Exception {
+        routerLsa.setVirtualEndPoint(true);
+        assertThat(routerLsa, is(notNullValue()));
+    }
+
+
+    /**
+     * Tests isAsBoundaryRouter() setter method.
+     */
+    @Test
+    public void testSetAsBoundaryRouter() throws Exception {
+        routerLsa.setAsBoundaryRouter(true);
+        assertThat(routerLsa, is(notNullValue()));
+    }
+
+    /**
+     * Tests areaBorderRouter() setter method.
+     */
+    @Test
+    public void testSetAreaBorderRouter() throws Exception {
+        routerLsa.setAreaBorderRouter(true);
+        assertThat(routerLsa, is(notNullValue()));
+    }
+
+    /**
+     * Tests noLink() getter method.
+     */
+    @Test
+    public void testGetNoLink() throws Exception {
+        routerLsa.setNoLink(10);
+        result1 = routerLsa.noLink();
+        assertThat(result1, is(10));
+    }
+
+    /**
+     * Tests noLink() setter method.
+     */
+    @Test
+    public void testSetNoLink() throws Exception {
+        routerLsa.setNoLink(10);
+        result1 = routerLsa.noLink();
+        assertThat(result1, is(10));
+    }
+
+    /**
+     * Tests addRouterLink() method.
+     */
+    @Test
+    public void testAddRouterLink() throws Exception {
+        routerLsa.setNoLink(0);
+        ospflsaLink = createOspfLsaLink();
+        routerLsa.addRouterLink(ospflsaLink);
+        routerLsa.incrementLinkNo();
+        result1 = routerLsa.noLink();
+        assertThat(result1, is(1));
+
+    }
+
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test
+    public void testReadFrom() throws Exception {
+        ospflsaLink = createOspfLsaLink();
+        routerLsa.addRouterLink(ospflsaLink);
+        inputArray = createByteForRouterLsa();
+        lsaHeader = createLsaHeader();
+        routerLsa = new RouterLsa(lsaHeader);
+        channelBuffer = ChannelBuffers.copiedBuffer(inputArray);
+        routerLsa.readFrom(channelBuffer);
+        assertThat(routerLsa, is(notNullValue()));
+    }
+
+    /**
+     * Tests readFrom() method.
+     */
+    @Test(expected = Exception.class)
+    public void testReadFrom1() throws Exception {
+        byte[] temp = {0, 0, 0};
+        ospflsaLink = createOspfLsaLink();
+        routerLsa.addRouterLink(ospflsaLink);
+        inputArray = temp;
+        lsaHeader = createLsaHeader();
+        routerLsa = new RouterLsa(lsaHeader);
+        channelBuffer = ChannelBuffers.copiedBuffer(inputArray);
+        routerLsa.readFrom(channelBuffer);
+        assertThat(routerLsa, is(notNullValue()));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test
+    public void testAsBytes() throws Exception {
+        result2 = routerLsa.asBytes();
+        assertThat(result2, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsaBodyAsByteArray() method.
+     */
+    @Test
+    public void testGetLsaBodyAsByteArray() throws Exception {
+        routerLsa.setAreaBorderRouter(true);
+        routerLsa.setVirtualEndPoint(true);
+        routerLsa.setAreaBorderRouter(true);
+        ospflsaLink = createOspfLsaLink();
+        routerLsa.addRouterLink(ospflsaLink);
+        result2 = routerLsa.getLsaBodyAsByteArray();
+        assertThat(result2, is(notNullValue()));
+    }
+
+    /**
+     * Tests getOspfLsaType() getter method.
+     */
+    @Test
+    public void testGetOspfLsaType() throws Exception {
+        routerLsa.setLsType(1);
+        result3 = routerLsa.getOspfLsaType();
+        assertThat(result3, is(OspfLsaType.ROUTER));
+    }
+
+    /**
+     * Tests incrementLinkNo() method.
+     */
+    @Test
+    public void testIncrementLinkNo() throws Exception {
+        routerLsa.setNoLink(1);
+        routerLsa.incrementLinkNo();
+        assertThat(routerLsa.noLink(), is(2));
+    }
+
+    /**
+     * Tests lsaHeader() method.
+     */
+    @Test
+    public void testGetLsaHeader() throws Exception {
+        lsaHeader = (LsaHeader) routerLsa.lsaHeader();
+        assertThat(lsaHeader, instanceOf(RouterLsa.class));
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        assertThat(routerLsa.toString(), is(notNullValue()));
+
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private OspfLsaLink createOspfLsaLink() {
+        ospflsaLink = new OspfLsaLink();
+        ospflsaLink.setLinkId("10.226.165.164");
+        ospflsaLink.setMetric(10);
+        ospflsaLink.setTos(50);
+        ospflsaLink.setLinkType(2);
+        ospflsaLink.setLinkData("10.226.165.170");
+        return ospflsaLink;
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private byte[] createByteForRouterLsa() {
+        byte[] packet = {2, 1, 1, 52, -64, -88, 56, 1, -64, -88, 56, 1, 0, 100, 0, 100, 0, 0, 0, 0, 0, 0, 0, 0, -64,
+                -88, 56, 1, 0, 10, 1, 1, 0, 0, 0, 40, -64, -88, 56, 1, -64, -88, 56, 1, -64, -88, 56, 1, -64, -88, 56,
+                1};
+        return packet;
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private LsaHeader createLsaHeader() {
+        lsaHeader = new LsaHeader();
+        lsaHeader.setLsType(1);
+        lsaHeader.setLsPacketLen(48);
+        lsaHeader.setLsCheckSum(10);
+        lsaHeader.setAge(4);
+        lsaHeader.setLinkStateId("10.226.165.164");
+        lsaHeader.setLsSequenceNo(250);
+        lsaHeader.setAdvertisingRouter(Ip4Address.valueOf("100.226.165.165"));
+        lsaHeader.setOptions(2);
+        return lsaHeader;
+    }
+
+    /**
+     * Tests hashcode() method.
+     */
+    @Test
+    public void testHashcode() throws Exception {
+
+        result1 = routerLsa.hashCode();
+        assertThat(result1, is(notNullValue()));
+
+    }
+}
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/OspfMessageReaderTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/OspfMessageReaderTest.java
new file mode 100644
index 0000000..8b1d089
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/OspfMessageReaderTest.java
@@ -0,0 +1,104 @@
+/*
+ * 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;
+
+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 static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+/**
+ * Unit test class for OspfMessageReader.
+ */
+
+public class OspfMessageReaderTest {
+
+    private final byte[] packet1 = {1, 1, 1, 1, 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};
+    private final byte[] packet2 = {1, 1, 1, 1, 2, 2, 0, 52, -64, -88, -86, 8, 0,
+            0, 0, 1, -96, 82, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, -36, 2, 7, 65, 119,
+            -87, 126, 0, 23, 2, 1, 10, 10, 10, 10, 10, 10, 10, 10, -128, 0, 0, 6,
+            -69, 26, 0, 36};
+    private final byte[] packet3 = {1, 1, 1, 1, 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};
+    private final byte[] packet4 = {1, 1, 1, 1, 2, 4, 1, 36, -64, -88, -86, 3, 0,
+            0, 0, 1, 54, 107, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0,
+            2, 2, 1, -64, -88, -86, 3, -64, -88, -86, 3, -128, 0
+            , 0, 1, 58, -100, 0, 48, 2, 0, 0, 2, -64, -88, -86
+            , 0, -1, -1, -1, 0, 3, 0, 0, 10, -64, -88, -86, 0,
+            -1, -1, -1, 0, 3, 0, 0, 10, 0, 3, 2, 5, 80, -44,
+            16, 0, -64, -88, -86, 2, -128, 0, 0, 1, 42, 73, 0,
+            36, -1, -1, -1, -1, -128, 0, 0, 20, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 3, 2, 5, -108, 121, -85, 0, -64, -88,
+            -86, 2, -128, 0, 0, 1, 52, -91, 0, 36, -1, -1, -1,
+            0, -128, 0, 0, 20, -64, -88, -86, 1, 0, 0, 0, 0, 0,
+            3, 2, 5, -64, -126, 120, 0, -64, -88, -86, 2, -128, 0,
+            0, 1, -45, 25, 0, 36, -1, -1, -1, 0, -128, 0, 0, 20,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 2, 5, -64, -88, 0, 0,
+            -64, -88, -86, 2, -128, 0, 0, 1, 55, 8, 0, 36, -1, -1
+            , -1, 0, -128, 0, 0, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            3, 2, 5, -64, -88, 1, 0, -64, -88, -86, 2, -128, 0, 0,
+            1, 44, 18, 0, 36, -1, -1, -1, 0, -128, 0, 0, 20, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 3, 2, 5, -64, -88, -84, 0, -64,
+            -88, -86, 2, -128, 0, 0, 1, 51, 65, 0, 36, -1, -1, -1, 0,
+            -128, 0, 0, 20, -64, -88, -86, 10, 0, 0, 0, 0};
+    private final byte[] packet5 = {1, 1, 1, 1, 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};
+    private OspfMessageReader ospfMessageReader;
+    private ChannelBuffer channelBuffer;
+
+    @Before
+    public void setUp() throws Exception {
+        ospfMessageReader = new OspfMessageReader();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        ospfMessageReader = null;
+        channelBuffer = null;
+    }
+
+    /**
+     * Tests readFromBuffer() method.
+     */
+    @Test
+    public void testReadFromBuffer() throws Exception {
+        channelBuffer = ChannelBuffers.copiedBuffer(packet1);
+        ospfMessageReader.readFromBuffer(channelBuffer);
+
+        channelBuffer = ChannelBuffers.copiedBuffer(packet2);
+        ospfMessageReader.readFromBuffer(channelBuffer);
+
+        channelBuffer = ChannelBuffers.copiedBuffer(packet3);
+        ospfMessageReader.readFromBuffer(channelBuffer);
+
+        channelBuffer = ChannelBuffers.copiedBuffer(packet4);
+        ospfMessageReader.readFromBuffer(channelBuffer);
+
+        channelBuffer = ChannelBuffers.copiedBuffer(packet5);
+        ospfMessageReader.readFromBuffer(channelBuffer);
+        assertThat(ospfMessageReader, is(notNullValue()));
+
+    }
+}
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/OspfMessageWriterTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/OspfMessageWriterTest.java
new file mode 100644
index 0000000..0600ebc
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/OspfMessageWriterTest.java
@@ -0,0 +1,164 @@
+/*
+ * 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;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.Ip4Address;
+import org.onosproject.ospf.protocol.ospfpacket.types.DdPacket;
+import org.onosproject.ospf.protocol.ospfpacket.types.HelloPacket;
+import org.onosproject.ospf.protocol.ospfpacket.types.LsAcknowledge;
+import org.onosproject.ospf.protocol.ospfpacket.types.LsRequest;
+import org.onosproject.ospf.protocol.ospfpacket.types.LsUpdate;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Unit test class for OspfMessageWriter.
+ */
+public class OspfMessageWriterTest {
+
+    private OspfMessageWriter ospfMessageWriter;
+    private HelloPacket helloPacket;
+    private DdPacket ddPacket;
+    private LsAcknowledge lsAck;
+    private LsRequest lsReq;
+    private LsUpdate lsUpdate;
+
+    @Before
+    public void setUp() throws Exception {
+        ospfMessageWriter = new OspfMessageWriter();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        ospfMessageWriter = null;
+        helloPacket = null;
+        ddPacket = null;
+        lsAck = null;
+        lsReq = null;
+        lsUpdate = null;
+    }
+
+    /**
+     * Tests writeToBuffer() method.
+     */
+    @Test
+    public void testWriteToBuffer() throws Exception {
+        helloPacket = new HelloPacket();
+        helloPacket.setAuthType(1);
+        helloPacket.setOspftype(1);
+        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);
+        helloPacket.setNetworkMask(Ip4Address.valueOf("255.255.255.255"));
+        helloPacket.setOptions(2); //not setting now
+        helloPacket.setHelloInterval(10);
+        helloPacket.setRouterPriority(1);
+        helloPacket.setRouterDeadInterval(40);
+        helloPacket.setDr(Ip4Address.valueOf("1.1.1.1"));
+        helloPacket.setBdr(Ip4Address.valueOf("2.2.2.2"));
+        helloPacket.addNeighbor(Ip4Address.valueOf("8.8.8.8"));
+        helloPacket.setDestinationIp(Ip4Address.valueOf("5.5.5.5"));
+        ospfMessageWriter.writeToBuffer(helloPacket, 7, 1);
+        assertThat(ospfMessageWriter, is(notNullValue()));
+    }
+
+    @Test(expected = Exception.class)
+    public void testWriteToBuffer1() 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);
+        ospfMessageWriter.writeToBuffer(ddPacket, 1, 1);
+        assertThat(ospfMessageWriter, is(notNullValue()));
+    }
+
+    @Test(expected = Exception.class)
+    public void testWriteToBuffer2() throws Exception {
+
+        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);
+        ospfMessageWriter.writeToBuffer(lsAck, 1, 1);
+        assertThat(ospfMessageWriter, is(notNullValue()));
+    }
+
+    @Test(expected = Exception.class)
+    public void testWriteToBuffer3() throws Exception {
+        lsReq = new LsRequest();
+        lsReq.setAuthType(1);
+        lsReq.setOspftype(3);
+        lsReq.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        lsReq.setAreaId(Ip4Address.valueOf("10.226.165.100"));
+        lsReq.setChecksum(201);
+        lsReq.setAuthentication(2);
+        lsReq.setOspfPacLength(48);
+        lsReq.setOspfVer(2);
+        ospfMessageWriter.writeToBuffer(lsReq, 1, 1);
+        assertThat(ospfMessageWriter, is(notNullValue()));
+    }
+
+    @Test(expected = Exception.class)
+    public void testWriteToBuffer4() throws Exception {
+        lsUpdate = new LsUpdate();
+        lsUpdate.setAuthType(1);
+        lsUpdate.setOspftype(3);
+        lsUpdate.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        lsUpdate.setAreaId(Ip4Address.valueOf("10.226.165.100"));
+        lsUpdate.setChecksum(201);
+        lsUpdate.setAuthentication(2);
+        lsUpdate.setOspfPacLength(48);
+        lsUpdate.setOspfVer(2);
+        ospfMessageWriter.writeToBuffer(lsUpdate, 1, 1);
+        assertThat(ospfMessageWriter, is(notNullValue()));
+    }
+
+    /**
+     * Tests writeToBuffer() method.
+     */
+    @Test(expected = Exception.class)
+    public void testWriteToBuffer5() throws Exception {
+        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);
+        ospfMessageWriter.writeToBuffer(lsAck, 1, 1);
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsUpdateTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsUpdateTest.java
new file mode 100644
index 0000000..8d48099
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/ospfpacket/types/LsUpdateTest.java
@@ -0,0 +1,345 @@
+/*
+ * 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.controller.OspfLsa;
+import org.onosproject.ospf.protocol.lsa.LsaHeader;
+import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader;
+import org.onosproject.ospf.protocol.lsa.types.AsbrSummaryLsa;
+import org.onosproject.ospf.protocol.lsa.types.ExternalLsa;
+import org.onosproject.ospf.protocol.lsa.types.NetworkLsa;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa10;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa11;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa9;
+import org.onosproject.ospf.protocol.lsa.types.RouterLsa;
+import org.onosproject.ospf.protocol.lsa.types.SummaryLsa;
+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.*;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+/**
+ * Unit test class for LsUpdate.
+ */
+public class LsUpdateTest {
+
+    private final byte[] packet1 = {0, 0, 0, 2, 0, 10, 2, 1, 7, 7, 7, 7, 7, 7, 7, 7,
+            -128, 0, 0, 2, 46, -126, 0, 48, 0, 0, 0, 2, 1, 1, 1, 1, 10, 10, 10, 7, 1,
+            0, 0, 10, 10, 10, 10, 0, -1, -1, -1, 0, 3, 0, 0, 10, 0, 10, 66, 10, 1, 0,
+            0, 1, 7, 7, 7, 7, -128, 0, 0, 1, -64, 79, 0, 116, 0, 1, 0, 4, 0, 0, 0, 0,
+            0, 2, 0, 84, 0, 1, 0, 1, 1, 0, 0, 0, 0, 2, 0, 4, 10, 10, 10, 0, 0, 5, 0,
+            4, 0, 0, 0, 0, 0, 6, 0, 4, 73, -104, -106, -128, 0, 7, 0, 4, 73, -104, -106,
+            -128, 0, 8, 0, 32, 73, -104, -106, -128, 73, -104, -106, -128, 73, -104, -106,
+            -128, 73, -104, -106, -128, 73, -104, -106, -128, 73, -104, -106, -128, 73,
+            -104, -106, -128, 73, -104, -106, -128, 0, 9, 0, 4, 0, 0, 0, 0};
+    private final byte[] packet3 = {0, 0, 0, 1, 0, 100, 2, 10, 1, 0, 0, 1, 9, 9, 9, 9,
+            -128, 0, 0, 1, -7, 62, 0, -124, 0, 2, 0, 108, 0, 1, 0, 1, 2, 0, 0, 0, 0, 2,
+            0, 4, -64, -88, 7, -91, 0, 3, 0, 4, -64, -88, 7, -91, 0, 4, 0, 4, 0, 0, 0,
+            0, 0, 5, 0, 4, 0, 0, 0, 1, 0, 6, 0, 4, 0, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 0,
+            0, 8, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 4, 0, 0, 0, 0, -128, 2, 0, 4, 0,
+            0, 0, 1};
+    private final byte[] packet2 = {0, 0,
+            0, 1, 0, 1, 2, 2, -64, -88,
+            -86, 8, -64, -88, -86, 8, -128, 0, 0, 1, 55, -73, 0, 32, -1, -1, -1, 0, -64,
+            -88, -86, 3, -64, -88, -86, 8};
+    private final byte[] packet4 = {0, 0, 0, 1, 0, 100, 2, 9, 1, 0, 0, 1, 9, 9, 9, 9, -128,
+            0, 0, 1, -7, 62, 0, -124, 0, 2, 0, 108, 0, 1, 0, 1, 2, 0, 0, 0, 0, 2, 0, 4, -64,
+            -88, 7, -91, 0, 3, 0, 4, -64, -88, 7, -91, 0, 4, 0, 4, 0, 0, 0, 0, 0, 5, 0, 4, 0,
+            0, 0, 1, 0, 6, 0, 4, 0, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 0, 0, 8, 0, 32, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 9, 0, 4, 0, 0, 0, 0, -128, 2, 0, 4, 0, 0, 0, 1};
+
+    private final byte[] packet5 = {0, 0, 0, 1, 0, 100, 2, 11, 1, 0, 0, 1, 9, 9, 9, 9, -128, 0,
+            0, 1, -7, 62, 0, -124, 0, 2, 0, 108, 0, 1, 0, 1, 2, 0, 0, 0, 0, 2, 0, 4, -64, -88,
+            7, -91, 0, 3, 0, 4, -64, -88, 7, -91, 0, 4, 0, 4, 0, 0, 0, 0, 0, 5, 0, 4, 0, 0, 0,
+            1, 0, 6, 0, 4, 0, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 0, 0, 8, 0, 32, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            9, 0, 4, 0, 0, 0, 0, -128, 2, 0, 4, 0, 0, 0, 1};
+    private final byte[] packet6 = {0, 0, 0, 1, 0, 100, 2, 3, 1, 0, 0, 1, 9, 9, 9, 9, -128,
+            0, 0, 1, -7, 62, 0, -124, 0, 2, 0, 108, 0, 1, 0, 1, 2, 0, 0, 0, 0, 2, 0, 4, -64,
+            -88, 7, -91, 0, 3, 0, 4, -64, -88, 7, -91, 0, 4, 0, 4, 0, 0, 0, 0, 0, 5, 0, 4,
+            0, 0, 0, 1, 0, 6, 0, 4, 0, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 0, 0, 8, 0, 32, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 9, 0, 4, 0, 0, 0, 0, -128, 2, 0, 4, 0, 0, 0, 1};
+    private final byte[] packet7 = {0, 0, 0, 1, 0, 100, 2, 4, 1, 0, 0, 1, 9, 9, 9, 9, -128,
+            0, 0, 1, -7, 62, 0, -124, 0, 2, 0, 108, 0, 1, 0, 1, 2, 0, 0, 0, 0, 2, 0, 4, -64,
+            -88, 7, -91, 0, 3, 0, 4, -64, -88, 7, -91, 0, 4, 0, 4, 0, 0, 0, 0, 0, 5, 0, 4, 0,
+            0, 0, 1, 0, 6, 0, 4, 0, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 0, 0, 8, 0, 32, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+            0, 9, 0, 4, 0, 0, 0, 0, -128, 2, 0, 4, 0, 0, 0, 1};
+
+    private final byte[] packet8 = {0, 0, 0, 2, 1, 4, 2, 1, 5, 5, 5, 5, 5, 5, 5, 5, -128, 0, 0,
+            4, -39, -84, 0, 36, 1, 0, 0, 1, -64, -88, 7, 90, -64, -88, 7, 92, 2, 0, 0, 10, 1, 4,
+            2, 4, -34, -34, -34, -34, 5, 5, 5, 5, -128, 0, 0, 1, 31, -93, 0, 28, 0, 0, 0, 0, 0,
+            0, 0, 10};
+    private LsUpdate lsUpdate;
+    private RouterLsa ospflsa;
+    private NetworkLsa ospflsa1;
+    private SummaryLsa ospflsa2;
+    private AsbrSummaryLsa ospflsa3;
+    private ExternalLsa ospflsa4;
+    private Vector<OspfLsa> listLSA = new Vector();
+    private List lsa;
+    private int result;
+    private OspfPacketType ospfMessageType;
+    private OspfPacketHeader ospfPacketHeader;
+    private byte[] result1;
+    private ChannelBuffer channelBuffer;
+    private OpaqueLsa10 opaqueLsa10;
+    private OpaqueLsa9 opaqueLsa9;
+    private OpaqueLsa11 opaqueLsa11;
+
+    @Before
+    public void setUp() throws Exception {
+        lsUpdate = new LsUpdate();
+        ospflsa = new RouterLsa();
+        lsUpdate.setAuthType(1);
+        lsUpdate.setOspftype(2);
+        lsUpdate.setRouterId(Ip4Address.valueOf("10.226.165.164"));
+        lsUpdate.setAreaId(Ip4Address.valueOf("10.226.165.100"));
+        lsUpdate.setChecksum(201);
+        lsUpdate.setAuthentication(2);
+        lsUpdate.setOspfPacLength(48);
+        lsUpdate.setOspfVer(2);
+        ospflsa.setLsType(1);
+        lsUpdate.addLsa(ospflsa);
+        ospflsa1 = new NetworkLsa();
+        ospflsa1.setNetworkMask(Ip4Address.valueOf("10.226.165.164"));
+        ospflsa1.setLsType(2);
+        lsUpdate.addLsa(ospflsa1);
+        ospflsa2 = new SummaryLsa(new LsaHeader());
+        ospflsa2.setLsType(3);
+        lsUpdate.addLsa(ospflsa2);
+        ospflsa3 = new AsbrSummaryLsa(new LsaHeader());
+        ospflsa3.setNetworkMask(Ip4Address.valueOf("10.226.165.164"));
+        ospflsa3.setLsType(4);
+        lsUpdate.addLsa(ospflsa3);
+        ospflsa4 = new ExternalLsa(new LsaHeader());
+        ospflsa4.setLsType(5);
+        lsUpdate.addLsa(ospflsa4);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        lsUpdate = null;
+        ospflsa = null;
+        ospflsa1 = null;
+        ospflsa2 = null;
+        ospflsa3 = null;
+        ospflsa4 = null;
+        listLSA.clear();
+        lsa = null;
+        ospfMessageType = null;
+        ospfPacketHeader = null;
+        result1 = null;
+        channelBuffer = null;
+        opaqueLsa9 = null;
+        opaqueLsa10 = null;
+        opaqueLsa11 = null;
+    }
+
+    /**
+     * Tests getLsaList() getter method.
+     */
+    @Test
+    public void testGetListLsa() throws Exception {
+        lsUpdate.addLsa(ospflsa);
+        lsUpdate.addLsa(ospflsa);
+        lsa = lsUpdate.getLsaList();
+        assertThat(lsa, is(notNullValue()));
+        assertThat(lsa.size(), is(5));
+    }
+
+    /**
+     * Tests addLsa() method.
+     */
+    @Test
+    public void testAddLsa() throws Exception {
+        lsUpdate.addLsa(ospflsa);
+        assertThat(lsUpdate, is(notNullValue()));
+    }
+
+    /**
+     * Tests noLsa() getter  method.
+     */
+    @Test
+    public void testGetNoLsa() throws Exception {
+        lsUpdate.setNumberOfLsa(5);
+        result = lsUpdate.noLsa();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(5));
+    }
+
+    /**
+     * Tests noLsa() setter  method.
+     */
+    @Test
+    public void testSetNoLsa() throws Exception {
+        lsUpdate.setNumberOfLsa(5);
+        result = lsUpdate.noLsa();
+        assertThat(result, is(notNullValue()));
+        assertThat(result, is(5));
+    }
+
+    /**
+     * Tests ospfMessageType() getter  method.
+     */
+    @Test
+    public void testGetOspfMessageType() throws Exception {
+        ospfMessageType = lsUpdate.ospfMessageType();
+        assertThat(ospfMessageType, is(OspfPacketType.LSUPDATE));
+    }
+
+    /**
+     * 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(4);
+        ospfPacketHeader.setOspfVer(2);
+        ospfPacketHeader.setRouterId(Ip4Address.valueOf("2.2.2.2"));
+        ospfPacketHeader.setSourceIp(Ip4Address.valueOf("3.3.3.3"));
+        lsUpdate = new LsUpdate(ospfPacketHeader);
+        result1 = createLsUpdatePacket();
+        channelBuffer = ChannelBuffers.copiedBuffer(result1);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet1);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet2);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet3);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet4);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet5);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet6);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet7);
+        lsUpdate.readFrom(channelBuffer);
+        channelBuffer = ChannelBuffers.copiedBuffer(packet8);
+        lsUpdate.readFrom(channelBuffer);
+        assertThat(lsUpdate, is(notNullValue()));
+        assertThat(lsUpdate.ospfMessageType(), is(OspfPacketType.LSUPDATE));
+    }
+
+    /**
+     * Tests asBytes() method.
+     */
+    @Test
+    public void testAsBytes() throws Exception {
+        result1 = lsUpdate.asBytes();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsuHeaderAsByteArray() method.
+     */
+    @Test
+    public void testGetLsuHeaderAsByteArray() throws Exception {
+        result1 = lsUpdate.getLsuHeaderAsByteArray();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    /**
+     * Tests getLsuBodyAsByteArray() method.
+     */
+    @Test
+    public void testGetLsuBodyAsByteArray() throws Exception {
+        lsUpdate.setNumberOfLsa(8);
+        lsUpdate.addLsa(ospflsa3);
+        opaqueLsa9 = new OpaqueLsa9(new OpaqueLsaHeader());
+        opaqueLsa9.setLsType(9);
+        lsUpdate.addLsa(opaqueLsa9);
+        opaqueLsa10 = new OpaqueLsa10(new OpaqueLsaHeader());
+        opaqueLsa10.setLsType(10);
+        lsUpdate.addLsa(opaqueLsa10);
+        opaqueLsa11 = new OpaqueLsa11(new OpaqueLsaHeader());
+        opaqueLsa10.setLsType(11);
+        lsUpdate.addLsa(opaqueLsa11);
+        result1 = lsUpdate.getLsuBodyAsByteArray();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    @Test
+    public void testGetLsuBodyAsByteArray1() throws Exception {
+        lsUpdate.setNumberOfLsa(8);
+        opaqueLsa10 = new OpaqueLsa10(new OpaqueLsaHeader());
+        opaqueLsa10.setLsType(10);
+        lsUpdate.addLsa(opaqueLsa10);
+        assertThat(result1, is(nullValue()));
+    }
+
+    @Test
+    public void testGetLsuBodyAsByteArray2() throws Exception {
+        opaqueLsa11 = new OpaqueLsa11(new OpaqueLsaHeader());
+        opaqueLsa11.setLsType(11);
+        lsUpdate.addLsa(opaqueLsa11);
+        result1 = lsUpdate.getLsuBodyAsByteArray();
+        assertThat(result1, is(notNullValue()));
+    }
+
+    /**
+     * Tests to string method.
+     */
+    @Test
+    public void testToString() throws Exception {
+        assertThat(lsUpdate.toString(), is(notNullValue()));
+    }
+
+    /**
+     * Utility method used by junit methods.
+     */
+    private byte[] createLsUpdatePacket() {
+        byte[] lsUpdatePacket = {0, 0, 0, 7, 0, 2, 2,
+                1, -64, -88, -86, 3, -64, -88, -86, 3, -128, 0, 0, 1, 58,
+                -100, 0, 48, 2, 0, 0, 2, -64, -88, -86, 0, -1, -1, -1, 0,
+                3, 0, 0, 10, -64, -88, -86, 0, -1, -1, -1, 0, 3, 0, 0, 10
+                , 0, 3, 2, 5, 80, -44, 16, 0, -64, -88, -86, 2, -128, 0, 0
+                , 1, 42, 73, 0, 36, -1, -1, -1, -1, -128, 0, 0, 20, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 3, 2, 5, -108, 121, -85, 0, -64, -88
+                , -86, 2, -128, 0, 0, 1, 52, -91, 0, 36, -1, -1, -1, 0,
+                -128, 0, 0, 20, -64, -88, -86, 1, 0, 0, 0, 0, 0, 3, 2, 5
+                , -64, -126, 120, 0, -64, -88, -86, 2, -128, 0, 0, 1, -45,
+                25, 0, 36, -1, -1, -1, 0, -128, 0, 0, 20, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 3, 2, 5, -64, -88, 0, 0, -64, -88, -86, 2,
+                -128, 0, 0, 1, 55, 8, 0, 36, -1, -1, -1, 0, -128, 0, 0,
+                20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 2, 5, -64, -88, 1, 0,
+                -64, -88, -86, 2, -128, 0, 0, 1, 44, 18, 0, 36, -1, -1, -1, 0, -128, 0,
+                0, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 2, 5, -64, -88, -84, 0, -64, -88,
+                -86, 2, -128, 0, 0, 1, 51, 65, 0, 36, -1, -1, -1, 0, -128, 0, 0, 20, -64,
+                -88, -86, 10, 0, 0, 0, 0};
+        return lsUpdatePacket;
+    }
+}
\ No newline at end of file
diff --git a/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/util/ChecksumCalculatorTest.java b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/util/ChecksumCalculatorTest.java
new file mode 100644
index 0000000..6b17cbb
--- /dev/null
+++ b/protocols/ospf/protocol/src/test/java/org/onosproject/ospf/protocol/util/ChecksumCalculatorTest.java
@@ -0,0 +1,367 @@
+/*
+ * 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.util;
+
+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.lsa.types.AsbrSummaryLsa;
+import org.onosproject.ospf.protocol.lsa.types.ExternalLsa;
+import org.onosproject.ospf.protocol.lsa.types.NetworkLsa;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa10;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa11;
+import org.onosproject.ospf.protocol.lsa.types.OpaqueLsa9;
+import org.onosproject.ospf.protocol.lsa.types.RouterLsa;
+import org.onosproject.ospf.protocol.lsa.types.SummaryLsa;
+import org.onosproject.ospf.protocol.ospfpacket.types.DdPacket;
+import org.onosproject.ospf.protocol.ospfpacket.types.HelloPacket;
+import org.onosproject.ospf.protocol.ospfpacket.types.LsAcknowledge;
+import org.onosproject.ospf.protocol.ospfpacket.types.LsRequest;
+import org.onosproject.ospf.protocol.ospfpacket.types.LsUpdate;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.notNullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+/**
+ * Unit test class for ChecksumCalculator.
+ */
+public class ChecksumCalculatorTest {
+
+    private final int ospfChecksumPos1 = 12;
+    private final int ospfChecksumPos2 = 13;
+    private final int lsaChecksumPos1 = 16;
+    private final int lsaChecksumPos2 = 17;
+    private final byte[] updatePacket = {1, 1, 1, 1, 2, 4, 0, -96, 9, 9, 9, 9, 5, 5, 5, 5, 62, 125,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 100, 2, 10, 1, 0, 0, 1, 9, 9, 9, 9, -128,
+            0, 0, 1, -7, 62, 0, -124, 0, 2, 0, 108, 0, 1, 0, 1, 2, 0, 0, 0, 0, 2, 0, 4, -64, -88,
+            7, -91, 0, 3, 0, 4, -64, -88, 7, -91, 0, 4, 0, 4, 0, 0, 0, 0, 0, 5, 0, 4, 0, 0, 0, 1,
+            0, 6, 0, 4, 0, 0, 0, 0, 0, 7, 0, 4, 0, 0, 0, 0, 0, 8, 0, 32, 0, 0, 0, 0, 0, 0, 0,
+            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9,
+            0, 4, 0, 0, 0, 0, -128, 2, 0, 4, 0, 0, 0, 1};
+
+    private final 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};
+    private final byte[] rlsa = {14, 16, 2, 1, -64, -88, -86, 2, -64, -88, -86, 2, -128, 0,
+            0, 1, 74, -114, 0, 48, 2, 0, 0, 2, -64, -88, -86, 0, -1, -1, -1, 0, 3, 0, 0, 10,
+            -64, -88, -86, 0, -1, -1, -1, 0, 3, 0, 0, 10};
+    private ChecksumCalculator checksumCalculator;
+    private boolean validate;
+    private HelloPacket hello;
+    private LsUpdate message;
+    private DdPacket message1;
+    private LsRequest message2;
+    private RouterLsa router;
+    private LsAcknowledge lsack;
+    private ExternalLsa external;
+    private NetworkLsa external1;
+    private SummaryLsa external2;
+    private AsbrSummaryLsa external3;
+    private OpaqueLsa9 external4;
+    private OpaqueLsa10 external5;
+    private OpaqueLsa11 external6;
+    private byte[] result;
+
+    @Before
+    public void setUp() throws Exception {
+        checksumCalculator = new ChecksumCalculator();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        checksumCalculator = null;
+        hello = null;
+        message = null;
+        message1 = null;
+        message2 = null;
+        router = null;
+        lsack = null;
+        external = null;
+        external1 = null;
+        external2 = null;
+        external3 = null;
+        result = null;
+    }
+
+    /**
+     * Tests convertToSixteenBits() method.
+     */
+    @Test
+    public void testConvertToSixteenBits() throws Exception {
+        int num = checksumCalculator.convertToSixteenBits("16cdd");
+        assertThat(num, is(27870));
+    }
+
+    /**
+     * Tests isValidOspfCheckSum() method.
+     */
+    @Test
+    public void testIsValidOspfCheckSum() throws Exception {
+        hello = new HelloPacket();
+        hello.setOspfVer(2);
+        hello.setOspftype(1);
+        hello.setOspfPacLength(172);
+        hello.setRouterId(Ip4Address.valueOf("192.168.170.3"));
+        hello.setAreaId(Ip4Address.valueOf("0.0.0.1"));
+        hello.setChecksum(5537);
+        hello.setAuthType(0);
+        hello.setAuthentication(0);
+        validate = checksumCalculator.isValidOspfCheckSum(hello, ospfChecksumPos1, ospfChecksumPos2);
+        assertThat(validate, is(false));
+        lsack = new LsAcknowledge();
+        lsack.setOspfVer(2);
+        lsack.setOspftype(5);
+        lsack.setOspfPacLength(172);
+        lsack.setRouterId(Ip4Address.valueOf("192.168.170.3"));
+        lsack.setAreaId(Ip4Address.valueOf("0.0.0.1"));
+        lsack.setChecksum(37537);
+        lsack.setAuthType(0);
+        lsack.setAuthentication(0);
+        validate = checksumCalculator.isValidOspfCheckSum(lsack, ospfChecksumPos1, ospfChecksumPos2);
+        assertThat(validate, is(true));
+        message = new LsUpdate();
+        message.setOspfVer(2);
+        message.setOspftype(5);
+        message.setOspfPacLength(172);
+        message.setRouterId(Ip4Address.valueOf("192.168.170.3"));
+        message.setAreaId(Ip4Address.valueOf("0.0.0.1"));
+        message.setChecksum(37537);
+        message.setAuthType(0);
+        message.setAuthentication(0);
+        validate = checksumCalculator.isValidOspfCheckSum(message, ospfChecksumPos1, ospfChecksumPos2);
+        assertThat(validate, is(true));
+        message1 = new DdPacket();
+        message1.setOspfVer(2);
+        message1.setOspftype(5);
+        message1.setOspfPacLength(172);
+        message1.setRouterId(Ip4Address.valueOf("192.168.170.3"));
+        message1.setAreaId(Ip4Address.valueOf("0.0.0.1"));
+        message1.setChecksum(37537);
+        message1.setAuthType(0);
+        message1.setAuthentication(0);
+        validate = checksumCalculator.isValidOspfCheckSum(message1, ospfChecksumPos1, ospfChecksumPos2);
+        assertThat(validate, is(true));
+        message2 = new LsRequest();
+        message2.setOspfVer(2);
+        message2.setOspftype(5);
+        message2.setOspfPacLength(172);
+        message2.setRouterId(Ip4Address.valueOf("192.168.170.3"));
+        message2.setAreaId(Ip4Address.valueOf("0.0.0.1"));
+        message2.setChecksum(37537);
+        message2.setAuthType(0);
+        message2.setAuthentication(0);
+        validate = checksumCalculator.isValidOspfCheckSum(message2, ospfChecksumPos1, ospfChecksumPos2);
+        assertThat(validate, is(true));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test
+    public void testIsValidLsaCheckSum() throws Exception {
+        router = new RouterLsa();
+        router.setAge(1);
+        router.setOptions(2);
+        router.setLsType(1);
+        router.setLinkStateId("192.168.170.3");
+        router.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.3"));
+        router.setLsSequenceNo(2147483649L);
+        router.setLsCheckSum(49499);
+        router.setLsPacketLen(48);
+        validate = checksumCalculator.isValidLsaCheckSum(router, router.lsType(), lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(true));
+
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test
+    public void testIsValidLsaCheckSum4() throws Exception {
+        external = new ExternalLsa(new LsaHeader());
+        external.setAge(2);
+        external.setOptions(2);
+        external.setLsType(5);
+        external.setLinkStateId("80.212.16.0");
+        external.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external.setLsSequenceNo(2147483649L);
+        external.setLsCheckSum(25125);
+        external.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external, external.lsType(), lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test(expected = Exception.class)
+    public void testIsValidLsaCheckSum5() throws Exception {
+        external1 = new NetworkLsa();
+        external1.setAge(2);
+        external1.setOptions(2);
+        external1.setLsType(2);
+        external1.setLinkStateId("80.212.16.0");
+        external1.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external1.setLsSequenceNo(2147483649L);
+        external1.setLsCheckSum(25125);
+        external1.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external1, external1.lsType(),
+                                                         lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test
+    public void testIsValidLsaCheckSum6() throws Exception {
+
+        external2 = new SummaryLsa(new LsaHeader());
+        external2.setAge(2);
+        external2.setOptions(2);
+        external2.setLsType(3);
+        external2.setLinkStateId("80.212.16.0");
+        external2.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external2.setLsSequenceNo(2147483649L);
+        external2.setLsCheckSum(25125);
+        external2.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external2, external2.lsType(),
+                                                         lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test(expected = Exception.class)
+    public void testIsValidLsaCheckSum7() throws Exception {
+        external3 = new AsbrSummaryLsa(new LsaHeader());
+        external3.setAge(2);
+        external3.setOptions(2);
+        external3.setLsType(4);
+        external3.setLinkStateId("80.212.16.0");
+        external3.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external3.setLsSequenceNo(2147483649L);
+        external3.setLsCheckSum(25125);
+        external3.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external3, external3.lsType(),
+                                                         lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test(expected = Exception.class)
+    public void testIsValidLsaCheckSum1() throws Exception {
+        external4 = new OpaqueLsa9(new OpaqueLsaHeader());
+        external4.setAge(2);
+        external4.setOptions(2);
+        external4.setLsType(9);
+        external4.setLinkStateId("80.212.16.0");
+        external4.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external4.setLsSequenceNo(2147483649L);
+        external4.setLsCheckSum(25125);
+        external4.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external4, external4.lsType(),
+                                                         lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test(expected = Exception.class)
+    public void testIsValidLsaCheckSum2() throws Exception {
+        external5 = new OpaqueLsa10(new OpaqueLsaHeader());
+        external5.setAge(2);
+        external5.setOptions(2);
+        external5.setLsType(10);
+        external5.setLinkStateId("80.212.16.0");
+        external5.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external5.setLsSequenceNo(2147483649L);
+        external5.setLsCheckSum(25125);
+        external5.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external5, external5.lsType(),
+                                                         lsaChecksumPos1, lsaChecksumPos2);
+
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests isValidLsaCheckSum() method.
+     */
+    @Test(expected = Exception.class)
+    public void testIsValidLsaCheckSum3() throws Exception {
+        external6 = new OpaqueLsa11(new OpaqueLsaHeader());
+        external6.setAge(2);
+        external6.setOptions(2);
+        external6.setLsType(10);
+        external6.setLinkStateId("80.212.16.0");
+        external6.setAdvertisingRouter(Ip4Address.valueOf("192.168.170.2"));
+        external6.setLsSequenceNo(2147483649L);
+        external6.setLsCheckSum(25125);
+        external6.setLsPacketLen(36);
+        validate = checksumCalculator.isValidLsaCheckSum(external6, external6.lsType(),
+                                                         lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(validate, is(false));
+    }
+
+    /**
+     * Tests validateLsaCheckSum() method.
+     */
+    @Test
+    public void testValidateLsaCheckSum() throws Exception {
+        assertThat(checksumCalculator.validateLsaCheckSum(rlsa, lsaChecksumPos1,
+                                                          lsaChecksumPos2), is(true));
+
+    }
+
+    /**
+     * Tests validateOspfCheckSum() method.
+     */
+    @Test
+    public void testValidateOspfCheckSum() throws Exception {
+        assertThat(checksumCalculator.validateOspfCheckSum(helloPacket, ospfChecksumPos1,
+                                                           ospfChecksumPos2), is(true));
+    }
+
+    /**
+     * Tests calculateLsaChecksum() method.
+     */
+    @Test
+    public void testCalculateLsaChecksum() throws Exception {
+        result = checksumCalculator.calculateLsaChecksum(rlsa, lsaChecksumPos1, lsaChecksumPos2);
+        assertThat(result, is(notNullValue()));
+    }
+
+    /**
+     * Tests calculateOspfCheckSum() method.
+     */
+    @Test
+    public void testCalculateOspfCheckSum() throws Exception {
+        result = checksumCalculator.calculateOspfCheckSum(helloPacket, ospfChecksumPos1,
+                                                          ospfChecksumPos2);
+        assertThat(result, is(notNullValue()));
+        result = checksumCalculator.calculateOspfCheckSum(updatePacket, ospfChecksumPos1,
+                                                          ospfChecksumPos2);
+        assertThat(result, is(notNullValue()));
+    }
+}
\ No newline at end of file