diff --git a/apps/k8s-node/app/src/test/java/org/onosproject/k8snode/impl/K8sHostManagerTest.java b/apps/k8s-node/app/src/test/java/org/onosproject/k8snode/impl/K8sHostManagerTest.java
new file mode 100644
index 0000000..3374672
--- /dev/null
+++ b/apps/k8s-node/app/src/test/java/org/onosproject/k8snode/impl/K8sHostManagerTest.java
@@ -0,0 +1,277 @@
+/*
+ * Copyright 2020-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.onosproject.k8snode.impl;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.common.util.concurrent.MoreExecutors;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.junit.TestUtils;
+import org.onlab.packet.IpAddress;
+import org.onosproject.cluster.ClusterServiceAdapter;
+import org.onosproject.cluster.LeadershipServiceAdapter;
+import org.onosproject.core.ApplicationId;
+import org.onosproject.core.CoreServiceAdapter;
+import org.onosproject.core.DefaultApplicationId;
+import org.onosproject.event.Event;
+import org.onosproject.k8snode.api.DefaultK8sHost;
+import org.onosproject.k8snode.api.K8sHost;
+import org.onosproject.k8snode.api.K8sHostEvent;
+import org.onosproject.k8snode.api.K8sHostListener;
+import org.onosproject.k8snode.api.K8sHostState;
+import org.onosproject.store.service.TestStorageService;
+
+import java.util.List;
+import java.util.Set;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.onosproject.k8snode.api.K8sHostEvent.Type.K8S_HOST_COMPLETE;
+import static org.onosproject.k8snode.api.K8sHostEvent.Type.K8S_HOST_CREATED;
+import static org.onosproject.k8snode.api.K8sHostEvent.Type.K8S_HOST_REMOVED;
+import static org.onosproject.k8snode.api.K8sHostEvent.Type.K8S_HOST_UPDATED;
+import static org.onosproject.k8snode.api.K8sHostEvent.Type.K8S_NODES_ADDED;
+import static org.onosproject.k8snode.api.K8sHostEvent.Type.K8S_NODES_REMOVED;
+import static org.onosproject.k8snode.api.K8sHostState.COMPLETE;
+import static org.onosproject.k8snode.api.K8sHostState.INIT;
+
+/**
+ * Unit tests for kubernetes host manager.
+ */
+public class K8sHostManagerTest {
+
+    private static final ApplicationId TEST_APP_ID = new DefaultApplicationId(1, "test");
+
+    private static final String ERR_SIZE = "Number of hosts did not match";
+    private static final String ERR_NOT_MATCH = "Host did not match";
+    private static final String ERR_NOT_FOUND = "Host did not exist";
+
+    private static final IpAddress HOST_IP_1 = IpAddress.valueOf("192.168.100.2");
+    private static final IpAddress HOST_IP_2 = IpAddress.valueOf("192.168.101.2");
+    private static final IpAddress HOST_IP_3 = IpAddress.valueOf("192.168.102.2");
+
+    private static final K8sHost HOST_1 = createHost(
+            HOST_IP_1,
+            INIT,
+            ImmutableSet.of("1", "2")
+    );
+
+    private static final K8sHost HOST_2 = createHost(
+            HOST_IP_2,
+            INIT,
+            ImmutableSet.of("3", "4")
+    );
+
+    private static final K8sHost HOST_3 = createHost(
+            HOST_IP_3,
+            COMPLETE,
+            ImmutableSet.of("5", "6")
+    );
+
+    private final TestK8sHostListener testListener = new TestK8sHostListener();
+
+    private K8sHostManager target;
+    private DistributedK8sHostStore hostStore;
+
+    /**
+     * Initial setup for this unit test.
+     */
+    @Before
+    public void setUp() {
+        hostStore = new DistributedK8sHostStore();
+        TestUtils.setField(hostStore, "coreService", new TestCoreService());
+        TestUtils.setField(hostStore, "storageService", new TestStorageService());
+        TestUtils.setField(hostStore, "eventExecutor", MoreExecutors.newDirectExecutorService());
+        hostStore.activate();
+
+        hostStore.createHost(HOST_2);
+        hostStore.createHost(HOST_3);
+
+        target = new K8sHostManager();
+        target.storageService = new TestStorageService();
+        target.coreService = new TestCoreService();
+        target.clusterService = new TestClusterService();
+        target.leadershipService = new TestLeadershipService();
+        target.hostStore = hostStore;
+        target.addListener(testListener);
+        target.activate();
+        testListener.events.clear();
+    }
+
+    /**
+     * Clean up unit test.
+     */
+    @After
+    public void tearDown() {
+        target.removeListener(testListener);
+        target.deactivate();
+        hostStore.deactivate();
+        hostStore = null;
+        target = null;
+    }
+
+    /**
+     * Checks if creating and removing a host work well with proper events.
+     */
+    @Test
+    public void testCreateAndRemoveHost() {
+        target.createHost(HOST_1);
+        assertEquals(ERR_SIZE, 3, target.hosts().size());
+        assertNotNull(target.host(HOST_IP_1));
+
+        target.removeHost(HOST_IP_1);
+        assertEquals(ERR_SIZE, 2, target.hosts().size());
+        assertNull(target.host(HOST_IP_1));
+
+        validateEvents(K8S_HOST_CREATED, K8S_HOST_REMOVED);
+    }
+
+    /**
+     * Checks if creating null host fails with proper exception.
+     */
+    @Test(expected = NullPointerException.class)
+    public void testCreateNullHost() {
+        target.createHost(null);
+    }
+
+    /**
+     * Checks if creating a duplicated host fails with proper exception.
+     */
+    @Test(expected = IllegalArgumentException.class)
+    public void testCreateDuplicateHost() {
+        target.createHost(HOST_1);
+        target.createHost(HOST_1);
+    }
+
+    /**
+     * Checks if removing null host fails with proper exception.
+     */
+    @Test(expected = IllegalArgumentException.class)
+    public void testRemoveNullHost() {
+        target.removeHost(null);
+    }
+
+    /**
+     * Checks if updating a host works well with proper event.
+     */
+    @Test
+    public void testUpdateHost() {
+        K8sHost updated = HOST_2.updateState(COMPLETE);
+        target.updateHost(updated);
+        validateEvents(K8S_HOST_UPDATED, K8S_HOST_COMPLETE);
+    }
+
+    /**
+     * Checks if updating a null host fails with proper exception.
+     */
+    @Test(expected = NullPointerException.class)
+    public void testUpdateNullHost() {
+        target.updateHost(null);
+    }
+
+    /**
+     * Checks if updating not existing host fails with proper exception.
+     */
+    @Test(expected = IllegalArgumentException.class)
+    public void testUpdateNotExistingHost() {
+        target.updateHost(HOST_1);
+    }
+
+    /**
+     * Checks if adding nodes into host works well with proper event.
+     */
+    @Test
+    public void testAddNodesToHost() {
+        K8sHost updated = HOST_2.updateNodeNames(ImmutableSet.of("3", "4", "5"));
+        target.updateHost(updated);
+        validateEvents(K8S_HOST_UPDATED, K8S_NODES_ADDED);
+    }
+
+    /**
+     * Checks if removing nodes from host works well with proper event.
+     */
+    @Test
+    public void testRemoveNodesFromHost() {
+        K8sHost updated = HOST_2.updateNodeNames(ImmutableSet.of("3"));
+        target.updateHost(updated);
+        validateEvents(K8S_HOST_UPDATED, K8S_NODES_REMOVED);
+    }
+
+    /**
+     * Checks if getting all hosts method returns correct set of nodes.
+     */
+    @Test
+    public void testGetAllHosts() {
+        assertEquals(ERR_SIZE, 2, target.hosts().size());
+        assertTrue(ERR_NOT_FOUND, target.hosts().contains(HOST_2));
+        assertTrue(ERR_NOT_FOUND, target.hosts().contains(HOST_3));
+    }
+
+    /**
+     * Checks if getting complete hosts method returns correct set of nodes.
+     */
+    @Test
+    public void testGetCompleteHosts() {
+        assertEquals(ERR_SIZE, 1, target.completeHosts().size());
+        assertTrue(ERR_NOT_FOUND, target.completeHosts().contains(HOST_3));
+    }
+
+    private void validateEvents(Enum... types) {
+        int i = 0;
+        assertEquals("Number of events did not match", types.length, testListener.events.size());
+        for (Event event : testListener.events) {
+            assertEquals("Incorrect event received", types[i], event.type());
+            i++;
+        }
+        testListener.events.clear();
+    }
+
+    private static class TestK8sHostListener implements K8sHostListener {
+        private List<K8sHostEvent> events = Lists.newArrayList();
+
+        @Override
+        public void event(K8sHostEvent event) {
+            events.add(event);
+        }
+    }
+
+    private static class TestCoreService extends CoreServiceAdapter {
+        @Override
+        public ApplicationId registerApplication(String name) {
+            return TEST_APP_ID;
+        }
+    }
+
+    private class TestClusterService extends ClusterServiceAdapter {
+
+    }
+
+    private static class TestLeadershipService extends LeadershipServiceAdapter {
+
+    }
+
+    private static K8sHost createHost(IpAddress hostIp, K8sHostState state, Set<String> nodeNames) {
+        return DefaultK8sHost.builder()
+                .hostIp(hostIp)
+                .nodeNames(nodeNames)
+                .state(state)
+                .build();
+    }
+}