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diff --git a/appc-lifecycle-management/state-machine-lib/src/test/java/org/openecomp/appc/statemachine/impl/StateMachineImplTest.java b/appc-lifecycle-management/state-machine-lib/src/test/java/org/openecomp/appc/statemachine/impl/StateMachineImplTest.java
new file mode 100644
index 000000000..16a489aca
--- /dev/null
+++ b/appc-lifecycle-management/state-machine-lib/src/test/java/org/openecomp/appc/statemachine/impl/StateMachineImplTest.java
@@ -0,0 +1,107 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Copyright (C) 2017 Amdocs
+ * =============================================================================
+ * 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.
+ * 
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.appc.statemachine.impl;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.internal.util.reflection.Whitebox;
+import org.openecomp.appc.exceptions.InvalidInputException;
+import org.openecomp.appc.statemachine.objects.Event;
+import org.openecomp.appc.statemachine.objects.Response;
+import org.openecomp.appc.statemachine.objects.State;
+import org.openecomp.appc.statemachine.objects.StateMachineMetadata;
+import org.openecomp.appc.statemachine.objects.StateMachineResponse;
+
+public class StateMachineImplTest {
+    private StateMachineMetadata metadata;
+    private StateMachineImpl stateMachine;
+
+    private State state1 = new State("TestingState1");
+    private State state2 = new State("TestingState2");
+    private Event event1 = new Event("TestingEvent1");
+    private Event event2 = new Event("TestingEvent2");
+
+    @Before
+    public void setUp() throws Exception {
+        StateMachineMetadata.StateMachineMetadataBuilder builder =
+                new StateMachineMetadata.StateMachineMetadataBuilder();
+        builder.addEvent(event1);
+        builder.addEvent(event2);
+        builder.addState(state1);
+        builder.addState(state2);
+        builder.addState(new State("TestingState3"));
+        builder.addTransition(state1, event1, state2);
+
+        metadata = builder.build();
+
+        stateMachine = new StateMachineImpl(metadata);
+    }
+
+    @Test
+    public void testConstructor() throws Exception {
+        StateMachineImpl stateMachine = new StateMachineImpl(metadata);
+        Assert.assertEquals("Should have set internal states",
+                metadata.getStates(), Whitebox.getInternalState(stateMachine, "states"));
+        Assert.assertEquals("Should have set internal events",
+                metadata.getEvents(), Whitebox.getInternalState(stateMachine, "events"));
+    }
+
+    @Test(expected = InvalidInputException.class)
+    public void testHandleEventThrowsInvalidInputException() throws Exception {
+        stateMachine.handleEvent(null, null);
+    }
+
+    @Test
+    public void testHandleEvent() throws Exception  {
+        StateMachineResponse response = stateMachine.handleEvent(state1, event1);
+        Assert.assertEquals(Response.VALID_TRANSITION, response.getResponse());
+        Assert.assertEquals(state2, response.getNextState());
+
+        response = stateMachine.handleEvent(state2, event1);
+        Assert.assertEquals(Response.NO_TRANSITION_DEFINED, response.getResponse());
+        Assert.assertTrue(response.getNextState() == null);
+    }
+
+    @Test
+    public void testValidateInputs() {
+        Assert.assertFalse(stateMachine.validateInputs(null, null));
+        Assert.assertFalse(stateMachine.validateInputs(new State("state1"), null));
+        Assert.assertFalse(stateMachine.validateInputs(null, new Event("event1")));
+        Assert.assertFalse(stateMachine.validateInputs(new State("state1"), new Event("event1")));
+        Assert.assertFalse(stateMachine.validateInputs(state1, new Event("event1")));
+        Assert.assertFalse(stateMachine.validateInputs(new State("state1"), event1));
+        Assert.assertTrue(stateMachine.validateInputs(state1, event1));
+
+    }
+
+    @Test
+    public void testToString() throws Exception {
+        Assert.assertEquals(
+                String.format(stateMachine.toStringFormat, metadata.getStates(), metadata.getEvents()),
+                stateMachine.toString());
+    }
+
+}