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diff --git a/feature-pooling-messages/src/test/java/org/onap/policy/drools/pooling/state/StateTest.java b/feature-pooling-messages/src/test/java/org/onap/policy/drools/pooling/state/StateTest.java
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+++ b/feature-pooling-messages/src/test/java/org/onap/policy/drools/pooling/state/StateTest.java
@@ -0,0 +1,466 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2018, 2020 AT&T Intellectual Property. All rights reserved.
+ * Modifications Copyright (C) 2024 Nordix 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.pooling.state;
+
+import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.onap.policy.drools.pooling.CancellableScheduledTask;
+import org.onap.policy.drools.pooling.PoolingManager;
+import org.onap.policy.drools.pooling.message.BucketAssignments;
+import org.onap.policy.drools.pooling.message.Heartbeat;
+import org.onap.policy.drools.pooling.message.Identification;
+import org.onap.policy.drools.pooling.message.Leader;
+import org.onap.policy.drools.pooling.message.Offline;
+import org.onap.policy.drools.pooling.message.Query;
+
+class StateTest extends SupportBasicStateTester {
+
+    private State state;
+
+    /**
+     * Setup.
+     */
+    @BeforeEach
+    public void setUp() throws Exception {
+        super.setUp();
+
+        state = new MyState(mgr);
+    }
+
+    @Test
+    void testStatePoolingManager() {
+        /*
+         * Prove the state is attached to the manager by invoking getHost(), which
+         * delegates to the manager.
+         */
+        assertEquals(MY_HOST, state.getHost());
+    }
+
+    @Test
+    void testStateState() {
+        // allocate a new state, copying from the old state
+        state = new MyState(mgr);
+
+        /*
+         * Prove the state is attached to the manager by invoking getHost(), which
+         * delegates to the manager.
+         */
+        assertEquals(MY_HOST, state.getHost());
+    }
+
+    @Test
+    void testCancelTimers() {
+        int delay = 100;
+        int initDelay = 200;
+
+        /*
+         * Create three tasks tasks.
+         */
+
+        StateTimerTask task1 = mock(StateTimerTask.class);
+        StateTimerTask task2 = mock(StateTimerTask.class);
+        StateTimerTask task3 = mock(StateTimerTask.class);
+
+        // two tasks via schedule()
+        state.schedule(delay, task1);
+        state.schedule(delay, task2);
+
+        // one task via scheduleWithFixedDelay()
+        state.scheduleWithFixedDelay(initDelay, delay, task3);
+
+        // ensure all were scheduled, but not yet canceled
+        verify(mgr).schedule(delay, task1);
+        verify(mgr).schedule(delay, task2);
+        verify(mgr).scheduleWithFixedDelay(initDelay, delay, task3);
+
+        CancellableScheduledTask sched1 = onceSchedules.removeFirst();
+        CancellableScheduledTask sched2 = onceSchedules.removeFirst();
+        CancellableScheduledTask sched3 = repeatedSchedules.removeFirst();
+
+        verify(sched1, never()).cancel();
+        verify(sched2, never()).cancel();
+        verify(sched3, never()).cancel();
+
+        /*
+         * Cancel the timers.
+         */
+        state.cancelTimers();
+
+        // verify that all were cancelled
+        verify(sched1).cancel();
+        verify(sched2).cancel();
+        verify(sched3).cancel();
+    }
+
+    @Test
+    void testStart() {
+        assertThatCode(() -> state.start()).doesNotThrowAnyException();
+    }
+
+    @Test
+    void testGoStart() {
+        State next = mock(State.class);
+        when(mgr.goStart()).thenReturn(next);
+
+        State next2 = state.goStart();
+        assertEquals(next, next2);
+    }
+
+    @Test
+    void testGoQuery() {
+        State next = mock(State.class);
+        when(mgr.goQuery()).thenReturn(next);
+
+        State next2 = state.goQuery();
+        assertEquals(next, next2);
+    }
+
+    @Test
+    void testGoActive_WithAssignment() {
+        State act = mock(State.class);
+        State inact = mock(State.class);
+
+        when(mgr.goActive()).thenReturn(act);
+        when(mgr.goInactive()).thenReturn(inact);
+
+        String[] arr = {HOST2, PREV_HOST, MY_HOST};
+        BucketAssignments asgn = new BucketAssignments(arr);
+
+        assertEquals(act, state.goActive(asgn));
+
+        verify(mgr).startDistributing(asgn);
+    }
+
+    @Test
+    void testGoActive_WithoutAssignment() {
+        State act = mock(State.class);
+        State inact = mock(State.class);
+
+        when(mgr.goActive()).thenReturn(act);
+        when(mgr.goInactive()).thenReturn(inact);
+
+        String[] arr = {HOST2, PREV_HOST};
+        BucketAssignments asgn = new BucketAssignments(arr);
+
+        assertEquals(inact, state.goActive(asgn));
+
+        verify(mgr).startDistributing(asgn);
+    }
+
+    @Test
+    void testGoActive_NullAssignment() {
+        State act = mock(State.class);
+        State inact = mock(State.class);
+
+        when(mgr.goActive()).thenReturn(act);
+        when(mgr.goInactive()).thenReturn(inact);
+
+        assertEquals(inact, state.goActive(null));
+
+        verify(mgr, never()).startDistributing(any());
+    }
+
+    @Test
+    void testGoInactive() {
+        State next = mock(State.class);
+        when(mgr.goInactive()).thenReturn(next);
+
+        State next2 = state.goInactive();
+        assertEquals(next, next2);
+    }
+
+    @Test
+    void testProcessHeartbeat() {
+        assertNull(state.process(new Heartbeat()));
+    }
+
+    @Test
+    void testProcessIdentification() {
+        assertNull(state.process(new Identification()));
+    }
+
+    @Test
+    void testProcessLeader() {
+        String[] arr = {HOST2, HOST1};
+        BucketAssignments asgn = new BucketAssignments(arr);
+        Leader msg = new Leader(HOST1, asgn);
+
+        // should ignore it
+        assertNull(state.process(msg));
+        verify(mgr).startDistributing(asgn);
+    }
+
+    @Test
+    void testProcessLeader_Invalid() {
+        Leader msg = new Leader(PREV_HOST, null);
+
+        // should stay in the same state, and not start distributing
+        assertNull(state.process(msg));
+        verify(mgr, never()).startDistributing(any());
+        verify(mgr, never()).goActive();
+        verify(mgr, never()).goInactive();
+    }
+
+    @Test
+    void testIsValidLeader_NullAssignment() {
+        assertFalse(state.isValid(new Leader(PREV_HOST, null)));
+    }
+
+    @Test
+    void testIsValidLeader_NullSource() {
+        String[] arr = {HOST2, PREV_HOST, MY_HOST};
+        BucketAssignments asgn = new BucketAssignments(arr);
+        assertFalse(state.isValid(new Leader(null, asgn)));
+    }
+
+    @Test
+    void testIsValidLeader_EmptyAssignment() {
+        assertFalse(state.isValid(new Leader(PREV_HOST, new BucketAssignments())));
+    }
+
+    @Test
+    void testIsValidLeader_FromSelf() {
+        String[] arr = {HOST2, MY_HOST};
+        BucketAssignments asgn = new BucketAssignments(arr);
+
+        assertFalse(state.isValid(new Leader(MY_HOST, asgn)));
+    }
+
+    @Test
+    void testIsValidLeader_WrongLeader() {
+        String[] arr = {HOST2, HOST3};
+        BucketAssignments asgn = new BucketAssignments(arr);
+
+        assertFalse(state.isValid(new Leader(HOST1, asgn)));
+    }
+
+    @Test
+    void testIsValidLeader() {
+        String[] arr = {HOST2, HOST1};
+        BucketAssignments asgn = new BucketAssignments(arr);
+
+        assertTrue(state.isValid(new Leader(HOST1, asgn)));
+    }
+
+    @Test
+    void testProcessOffline() {
+        assertNull(state.process(new Offline()));
+    }
+
+    @Test
+    void testProcessQuery() {
+        assertNull(state.process(new Query()));
+    }
+
+    @Test
+    void testPublishIdentification() {
+        Identification msg = new Identification();
+        state.publish(msg);
+
+        verify(mgr).publishAdmin(msg);
+    }
+
+    @Test
+    void testPublishLeader() {
+        Leader msg = new Leader();
+        state.publish(msg);
+
+        verify(mgr).publishAdmin(msg);
+    }
+
+    @Test
+    void testPublishOffline() {
+        Offline msg = new Offline();
+        state.publish(msg);
+
+        verify(mgr).publishAdmin(msg);
+    }
+
+    @Test
+    void testPublishQuery() {
+        Query msg = new Query();
+        state.publish(msg);
+
+        verify(mgr).publishAdmin(msg);
+    }
+
+    @Test
+    void testPublishStringHeartbeat() {
+        String chnl = "channelH";
+        Heartbeat msg = new Heartbeat();
+
+        state.publish(chnl, msg);
+
+        verify(mgr).publish(chnl, msg);
+    }
+
+    @Test
+    void testStartDistributing() {
+        BucketAssignments asgn = new BucketAssignments();
+        state.startDistributing(asgn);
+
+        verify(mgr).startDistributing(asgn);
+    }
+
+    @Test
+    void testStartDistributing_NullAssignments() {
+        state.startDistributing(null);
+
+        verify(mgr, never()).startDistributing(any());
+    }
+
+    @Test
+    void testSchedule() {
+        int delay = 100;
+
+        StateTimerTask task = mock(StateTimerTask.class);
+
+        state.schedule(delay, task);
+
+        CancellableScheduledTask sched = onceSchedules.removeFirst();
+
+        // scheduled, but not canceled yet
+        verify(mgr).schedule(delay, task);
+        verify(sched, never()).cancel();
+
+        /*
+         * Ensure the state added the timer to its list by telling it to cancel its timers
+         * and then seeing if this timer was canceled.
+         */
+        state.cancelTimers();
+        verify(sched).cancel();
+    }
+
+    @Test
+    void testScheduleWithFixedDelay() {
+        int initdel = 100;
+        int delay = 200;
+
+        StateTimerTask task = mock(StateTimerTask.class);
+
+        state.scheduleWithFixedDelay(initdel, delay, task);
+
+        CancellableScheduledTask sched = repeatedSchedules.removeFirst();
+
+        // scheduled, but not canceled yet
+        verify(mgr).scheduleWithFixedDelay(initdel, delay, task);
+        verify(sched, never()).cancel();
+
+        /*
+         * Ensure the state added the timer to its list by telling it to cancel its timers
+         * and then seeing if this timer was canceled.
+         */
+        state.cancelTimers();
+        verify(sched).cancel();
+    }
+
+    @Test
+    void testMissedHeartbeat() {
+        State next = mock(State.class);
+        when(mgr.goStart()).thenReturn(next);
+
+        State next2 = state.missedHeartbeat();
+        assertEquals(next, next2);
+
+        // should continue to distribute
+        verify(mgr, never()).startDistributing(null);
+
+        Offline msg = captureAdminMessage(Offline.class);
+        assertEquals(MY_HOST, msg.getSource());
+    }
+
+    @Test
+    void testInternalTopicFailed() {
+        State next = mock(State.class);
+        when(mgr.goInactive()).thenReturn(next);
+
+        State next2 = state.internalTopicFailed();
+        assertEquals(next, next2);
+
+        // should stop distributing
+        verify(mgr).startDistributing(null);
+
+        Offline msg = captureAdminMessage(Offline.class);
+        assertEquals(MY_HOST, msg.getSource());
+    }
+
+    @Test
+    void testMakeHeartbeat() {
+        long timestamp = 30000L;
+        Heartbeat msg = state.makeHeartbeat(timestamp);
+
+        assertEquals(MY_HOST, msg.getSource());
+        assertEquals(timestamp, msg.getTimestampMs());
+    }
+
+    @Test
+    void testMakeIdentification() {
+        Identification ident = state.makeIdentification();
+        assertEquals(MY_HOST, ident.getSource());
+        assertEquals(ASGN3, ident.getAssignments());
+    }
+
+    @Test
+    void testMakeOffline() {
+        Offline msg = state.makeOffline();
+
+        assertEquals(MY_HOST, msg.getSource());
+    }
+
+    @Test
+    void testMakeQuery() {
+        Query msg = state.makeQuery();
+
+        assertEquals(MY_HOST, msg.getSource());
+    }
+
+    @Test
+    void testGetHost() {
+        assertEquals(MY_HOST, state.getHost());
+    }
+
+    @Test
+    void testGetTopic() {
+        assertEquals(MY_TOPIC, state.getTopic());
+    }
+
+    /**
+     * State used for testing purposes, with abstract methods implemented.
+     */
+    private static class MyState extends State {
+
+        public MyState(PoolingManager mgr) {
+            super(mgr);
+        }
+    }
+}