diff --git a/src/test/java/org/opencord/kafka/integrations/DhcpL2RelayKafkaIntegrationTest.java b/src/test/java/org/opencord/kafka/integrations/DhcpL2RelayKafkaIntegrationTest.java
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+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.opencord.kafka.integrations;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.collect.Maps;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.onlab.packet.DHCP;
+import org.onosproject.cluster.ClusterServiceAdapter;
+import org.onosproject.net.ConnectPoint;
+import org.opencord.dhcpl2relay.DhcpAllocationInfo;
+import org.opencord.dhcpl2relay.DhcpL2RelayEvent;
+import org.opencord.dhcpl2relay.DhcpL2RelayListener;
+import org.opencord.dhcpl2relay.DhcpL2RelayService;
+import org.opencord.kafka.EventBusService;
+
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.junit.Assert.assertEquals;
+import static org.opencord.kafka.integrations.MockDeviceService.DEVICE_ID_1;
+
+/**
+ * set of unit test cases for DhcpL2RelayKafkaIntegration.
+ */
+class DhcpL2RelayKafkaIntegrationTest extends KafkaIntegrationTestBase {
+
+    private static final String DHCP_COUNTER_TOPIC = "DHCPREQUEST";
+    private DhcpL2RelayKafkaIntegration dhcpL2RelayKafkaIntegration;
+    private DhcpL2RelayListener dhcpL2RelayListener;
+
+    @BeforeEach
+    void setUp() {
+        dhcpL2RelayKafkaIntegration = new DhcpL2RelayKafkaIntegration();
+        dhcpL2RelayKafkaIntegration.clusterService = new ClusterServiceAdapter();
+        dhcpL2RelayKafkaIntegration.deviceService = new MockDeviceService();
+        dhcpL2RelayKafkaIntegration.eventBusService = new MockEventBusService();
+        dhcpL2RelayKafkaIntegration.ignore = new MockDhcpL2RelayService();
+        dhcpL2RelayKafkaIntegration.bindDhcpL2RelayService(dhcpL2RelayKafkaIntegration.ignore);
+        dhcpL2RelayKafkaIntegration.activate();
+    }
+
+    @AfterEach
+    void tearDown() {
+        dhcpL2RelayKafkaIntegration.deactivate();
+    }
+
+    @Test
+    void testDhcpL2RelayStatsUpdate() {
+        Map.Entry<String, AtomicLong> entryCounter = Maps.immutableEntry(DHCP_COUNTER_TOPIC,
+                new AtomicLong(1));
+        DhcpAllocationInfo allocationInfo = new DhcpAllocationInfo(
+                OLT_CONNECT_POINT,
+                DHCP.MsgType.DHCPREQUEST, ONU_SERIAL, OLT_MAC,
+                LOCAL_IP);
+        DhcpL2RelayEvent event = new DhcpL2RelayEvent(DhcpL2RelayEvent.Type.STATS_UPDATE,
+                allocationInfo, OLT_CONNECT_POINT, entryCounter, DHCP_COUNTER_TOPIC, null);
+        dhcpL2RelayListener.event(event);
+        assertEquals(MockEventBusService.dhcpStats, 1);
+        assertEquals(MockEventBusService.otherCounter, 0);
+    }
+
+    /**
+     * test to verify the DhcpL2RelayEvent.STATS_UPDATE event.
+     */
+    @Test
+    void testDhcpL2RelayStatsSubscriberUpdate() {
+        Map.Entry<String, AtomicLong> entryCounter = Maps.immutableEntry(DHCP_COUNTER_TOPIC, new AtomicLong(1));
+
+        DhcpAllocationInfo allocationInfo = new DhcpAllocationInfo(
+                OLT_CONNECT_POINT,
+                DHCP.MsgType.DHCPREQUEST, ONU_SERIAL, OLT_MAC,
+                LOCAL_IP);
+        DhcpL2RelayEvent event = new DhcpL2RelayEvent(DhcpL2RelayEvent.Type.STATS_UPDATE,
+                allocationInfo, OLT_CONNECT_POINT, entryCounter, DHCP_COUNTER_TOPIC, ONU_SERIAL);
+        dhcpL2RelayListener.event(event);
+        assertEquals(MockEventBusService.dhcpStats, 1);
+        assertEquals(MockEventBusService.otherCounter, 0);
+    }
+
+    /**
+     * test to verify the DhcpL2RelayEvent.UPDATE event.
+     */
+    @Test
+    void testDhcpL2RelayUpdate() {
+        ConnectPoint cp = new ConnectPoint(DEVICE_ID_1, PORT.number());
+        Map.Entry<String, AtomicLong> entryCounter = Maps.immutableEntry(DHCP_COUNTER_TOPIC, new AtomicLong(1));
+        DhcpAllocationInfo allocationInfo = new DhcpAllocationInfo(
+                new ConnectPoint(DEVICE_ID_1, PORT.number()),
+                DHCP.MsgType.DHCPREQUEST, ONU_SERIAL, OLT_MAC,
+                LOCAL_IP);
+        DhcpL2RelayEvent event = new DhcpL2RelayEvent(DhcpL2RelayEvent.Type.UPDATED,
+                allocationInfo, cp, entryCounter, DHCP_COUNTER_TOPIC, null);
+        dhcpL2RelayListener.event(event);
+        assertEquals(MockEventBusService.dhcpEvents, 1);
+        assertEquals(MockEventBusService.otherCounter, 0);
+    }
+
+    private static class MockEventBusService implements EventBusService {
+        static int dhcpStats;
+        static int dhcpEvents;
+        static int otherCounter;
+
+        MockEventBusService() {
+            dhcpStats = 0;
+            dhcpEvents = 0;
+            otherCounter = 0;
+        }
+
+        @Override
+        public void send(String topic, JsonNode data) {
+            switch (topic) {
+                case DhcpL2RelayKafkaIntegration.DHCP_STATS_TOPIC:
+                    dhcpStats++;
+                    break;
+                case DhcpL2RelayKafkaIntegration.TOPIC:
+                    dhcpEvents++;
+                    break;
+                default:
+                    otherCounter++;
+                    break;
+            }
+        }
+    }
+
+    private class MockDhcpL2RelayService implements DhcpL2RelayService {
+        @Override
+        public void addListener(DhcpL2RelayListener listener) {
+            dhcpL2RelayListener = listener;
+        }
+
+        @Override
+        public void removeListener(DhcpL2RelayListener listener) {
+            dhcpL2RelayListener = null;
+        }
+    }
+}
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