Adding policy-model, model-api & engine-model

Change-Id: I56702b8f0953457d493f894d155b2a6ddc87b10c
Issue-ID: POLICY-856
Signed-off-by: waqas.ikram <waqas.ikram@ericsson.com>

4 files changed, 609 insertions, 0 deletions

diff --git a/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/concepts/TestEngineModel.java b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/concepts/TestEngineModel.java
new file mode 100644
index 000000000..86530462c
--- /dev/null
+++ b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/concepts/TestEngineModel.java
@@ -0,0 +1,187 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.model.enginemodel.concepts;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxKeyInformation;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult;
+import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult.ValidationResult;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbums;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextSchemas;
+
+/**
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class TestEngineModel {
+
+    @Test
+    public void testEnginetModel() {
+        assertNotNull(new AxEngineModel());
+        assertNotNull(new AxEngineModel(new AxArtifactKey()));
+        assertNotNull(new AxEngineModel(new AxArtifactKey(), new AxContextSchemas(), new AxKeyInformation(),
+                new AxContextAlbums()));
+        assertNotNull(new AxEngineModel(new AxArtifactKey(), new AxContextSchemas(), new AxKeyInformation(),
+                new AxContextAlbums(), AxEngineState.UNDEFINED, new AxEngineStats()));
+
+        final AxArtifactKey modelKey = new AxArtifactKey("ModelName", "0.0.1");
+        final AxArtifactKey schemasKey = new AxArtifactKey("SchemasKey", "0.0.1");
+        final AxArtifactKey albumKey = new AxArtifactKey("AlbumKey", "0.0.1");
+        final AxArtifactKey keyInfoKey = new AxArtifactKey("SchemasKey", "0.0.1");
+        final AxEngineStats stats = new AxEngineStats(new AxReferenceKey(modelKey, "EngineStats"));
+        final AxEngineStats otherStats = new AxEngineStats();
+        otherStats.setAverageExecutionTime(100);
+
+        final AxEngineModel model = new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats);
+        model.register();
+
+        try {
+            model.setKey(null);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertEquals("key may not be null", e.getMessage());
+        }
+
+        model.setKey(modelKey);
+        assertEquals("ModelName:0.0.1", model.getKey().getID());
+        assertEquals("ModelName:0.0.1", model.getKeys().get(0).getID());
+
+        final long timestamp = System.currentTimeMillis();
+        model.setTimestamp(timestamp);
+        assertEquals(timestamp, model.getTimestamp());
+        model.setTimestamp(-1);
+        assertTrue(model.getTimeStampString().matches("\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}.\\d{3}"));
+
+        try {
+            model.setState(null);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertEquals("state may not be null", e.getMessage());
+        }
+
+        for (final AxEngineState state : AxEngineState.values()) {
+            model.setState(state);
+            assertEquals(state, model.getState());
+        }
+
+        model.setState(AxEngineState.READY);
+        assertEquals(AxEngineState.READY, model.getState());
+
+        try {
+            model.setStats(null);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertEquals("stats may not be null", e.getMessage());
+        }
+
+        model.setStats(stats);
+        assertEquals(stats, model.getStats());
+
+        model.clean();
+        assertNotNull(model);
+        assertEquals("AxEngineModel:(AxEngineModel:(AxEngineModel:(key=A", model.toString().substring(0, 50));
+
+        final AxEngineModel clonedModel = new AxEngineModel(model);
+
+        assertFalse(model.hashCode() == 0);
+
+        assertTrue(model.equals(model));
+        assertTrue(model.equals(clonedModel));
+        assertFalse(model.equals("Hello"));
+        assertFalse(model.equals(new AxEngineModel(new AxArtifactKey())));
+        assertFalse(model.equals(new AxEngineModel(new AxArtifactKey(), new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        assertFalse(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(), new AxKeyInformation(keyInfoKey),
+                new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        assertFalse(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey), new AxKeyInformation(),
+                new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        assertFalse(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(), AxEngineState.READY, stats)));
+        assertFalse(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.STOPPED, stats)));
+        assertFalse(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, otherStats)));
+        model.setTimestamp(timestamp);
+        assertFalse(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        model.setTimestamp(0);
+        assertTrue(model.equals(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+
+        model.setTimestamp(-1);
+        assertEquals(0, model.compareTo(model));
+        assertEquals(0, model.compareTo(clonedModel));
+        assertNotEquals(0, model.compareTo(new AxArtifactKey()));
+        assertFalse(model.equals(new AxEngineModel(new AxArtifactKey())));
+        assertNotEquals(0, model.compareTo(new AxEngineModel(new AxArtifactKey(), new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        assertNotEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        assertNotEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        assertNotEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(), AxEngineState.READY, stats)));
+        assertNotEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.STOPPED, stats)));
+        assertNotEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, otherStats)));
+        model.setTimestamp(timestamp);
+        assertNotEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+        model.setTimestamp(0);
+        assertEquals(0, model.compareTo(new AxEngineModel(modelKey, new AxContextSchemas(schemasKey),
+                new AxKeyInformation(keyInfoKey), new AxContextAlbums(albumKey), AxEngineState.READY, stats)));
+
+        model.setTimestamp(timestamp);
+        AxValidationResult result = new AxValidationResult();
+        result = model.validate(result);
+        assertEquals(ValidationResult.VALID, result.getValidationResult());
+
+        model.setTimestamp(-1);
+        result = new AxValidationResult();
+        result = model.validate(result);
+        assertEquals(ValidationResult.INVALID, result.getValidationResult());
+
+        model.setTimestamp(timestamp);
+        result = new AxValidationResult();
+        result = model.validate(result);
+        assertEquals(ValidationResult.VALID, result.getValidationResult());
+
+        model.setState(AxEngineState.UNDEFINED);
+        result = new AxValidationResult();
+        result = model.validate(result);
+        assertEquals(ValidationResult.INVALID, result.getValidationResult());
+
+        model.setState(AxEngineState.READY);
+        result = new AxValidationResult();
+        result = model.validate(result);
+        assertEquals(ValidationResult.VALID, result.getValidationResult());
+    }
+}
diff --git a/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/concepts/TestEngineStats.java b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/concepts/TestEngineStats.java
new file mode 100644
index 000000000..f5fdcbb1f
--- /dev/null
+++ b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/concepts/TestEngineStats.java
@@ -0,0 +1,193 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.model.enginemodel.concepts;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult;
+import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult.ValidationResult;
+
+/**
+ * @author Liam Fallon (liam.fallon@ericsson.com)
+ */
+public class TestEngineStats {
+
+    @Test
+    public void testEngineStats() {
+        assertNotNull(new AxEngineStats());
+        assertNotNull(new AxEngineStats(new AxReferenceKey()));
+
+        final AxReferenceKey statsKey = new AxReferenceKey("EngineKey", "0.0.1", "EngineStats");
+        final AxEngineStats stats = new AxEngineStats(statsKey);
+
+        try {
+            stats.setKey(null);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertEquals("key may not be null", e.getMessage());
+        }
+
+        stats.setKey(statsKey);
+        assertEquals("EngineKey:0.0.1:NULL:EngineStats", stats.getKey().getID());
+        assertEquals("EngineKey:0.0.1:NULL:EngineStats", stats.getKeys().get(0).getID());
+
+        stats.setAverageExecutionTime(123.45);
+        assertEquals(new Double(123.45), new Double(stats.getAverageExecutionTime()));
+
+        stats.setEventCount(987);
+        assertEquals(987, stats.getEventCount());
+
+        final long lastExecutionTime = System.currentTimeMillis();
+        stats.setLastExecutionTime(lastExecutionTime);
+        assertEquals(lastExecutionTime, stats.getLastExecutionTime());
+
+        final long timestamp = System.currentTimeMillis();
+        stats.setTimeStamp(timestamp);
+        assertEquals(timestamp, stats.getTimeStamp());
+        assertNotNull(stats.getTimeStampString());
+
+        final long upTime = System.currentTimeMillis() - timestamp;
+        stats.setUpTime(upTime);
+        assertEquals(upTime, stats.getUpTime());
+
+        stats.engineStart();
+        assertTrue(stats.getUpTime() > -1);
+        stats.engineStop();
+        assertTrue(stats.getUpTime() >= 0);
+
+        stats.engineStop();
+
+        stats.reset();
+
+        stats.setEventCount(-2);
+        stats.executionEnter(new AxArtifactKey());
+        assertEquals(2, stats.getEventCount());
+
+        stats.setEventCount(10);
+        stats.executionEnter(new AxArtifactKey());
+        assertEquals(11, stats.getEventCount());
+
+        stats.reset();
+        stats.engineStart();
+        stats.setEventCount(4);
+        stats.executionEnter(new AxArtifactKey());
+        try {
+            Thread.sleep(10);
+        } catch (final Exception e) {
+            fail("test should not throw an exeption");
+        }
+        stats.executionExit();
+        final double avExecutionTime = stats.getAverageExecutionTime();
+        System.err.println(avExecutionTime);
+        assertTrue(avExecutionTime >= 2.0 && avExecutionTime < 3.0);
+        stats.engineStop();
+
+        AxValidationResult result = new AxValidationResult();
+        result = stats.validate(result);
+        assertEquals(ValidationResult.VALID, result.getValidationResult());
+
+        stats.setKey(new AxReferenceKey());
+        result = new AxValidationResult();
+        result = stats.validate(result);
+        assertEquals(ValidationResult.INVALID, result.getValidationResult());
+
+        stats.setKey(statsKey);
+        result = new AxValidationResult();
+        result = stats.validate(result);
+        assertEquals(ValidationResult.VALID, result.getValidationResult());
+
+        stats.clean();
+        stats.reset();
+
+        final AxEngineStats clonedStats = new AxEngineStats(stats);
+        assertEquals("AxEngineStats:(engineKey=AxReferenceKey:(parentKey", clonedStats.toString().substring(0, 50));
+
+        assertNotNull(stats.getKeys());
+
+        assertFalse(stats.hashCode() == 0);
+
+        assertTrue(stats.equals(stats));
+        assertTrue(stats.equals(clonedStats));
+        assertFalse(stats.equals(null));
+        assertFalse(stats.equals("Hello"));
+        assertFalse(stats.equals(new AxEngineStats(new AxReferenceKey())));
+
+        assertEquals(0, stats.compareTo(stats));
+        assertEquals(0, stats.compareTo(clonedStats));
+        assertNotEquals(0, stats.compareTo(new AxArtifactKey()));
+        assertNotEquals(0, stats.compareTo(null));
+        assertNotEquals(0, stats.compareTo(new AxEngineStats(new AxReferenceKey())));
+
+        stats.setTimeStamp(1);
+        assertFalse(stats.equals(new AxEngineStats(statsKey)));
+        assertNotEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+        stats.setTimeStamp(0);
+        assertTrue(stats.equals(new AxEngineStats(statsKey)));
+        assertEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+
+        stats.setEventCount(1);
+        assertFalse(stats.equals(new AxEngineStats(statsKey)));
+        assertNotEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+        stats.setEventCount(0);
+        assertTrue(stats.equals(new AxEngineStats(statsKey)));
+        assertEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+
+        stats.setLastExecutionTime(1);
+        assertFalse(stats.equals(new AxEngineStats(statsKey)));
+        assertNotEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+        stats.setLastExecutionTime(0);
+        assertTrue(stats.equals(new AxEngineStats(statsKey)));
+        assertEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+
+        stats.setAverageExecutionTime(1);
+        assertFalse(stats.equals(new AxEngineStats(statsKey)));
+        assertNotEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+        stats.setAverageExecutionTime(0);
+        assertTrue(stats.equals(new AxEngineStats(statsKey)));
+        assertEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+
+        stats.setUpTime(1);
+        assertFalse(stats.equals(new AxEngineStats(statsKey)));
+        assertNotEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+        stats.setUpTime(0);
+        assertTrue(stats.equals(new AxEngineStats(statsKey)));
+        assertEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+
+        stats.engineStart();
+        assertFalse(stats.equals(new AxEngineStats(statsKey)));
+        final AxEngineStats newStats = new AxEngineStats(statsKey);
+        newStats.setTimeStamp(stats.getTimeStamp());
+        assertFalse(stats.equals(newStats));
+        assertNotEquals(0, stats.compareTo(newStats));
+        stats.engineStop();
+        stats.reset();
+        assertTrue(stats.equals(new AxEngineStats(statsKey)));
+        assertEquals(0, stats.compareTo(new AxEngineStats(statsKey)));
+    }
+}
diff --git a/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/handling/TestApexEngineModel.java b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/handling/TestApexEngineModel.java
new file mode 100644
index 000000000..c1e6f3f37
--- /dev/null
+++ b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/handling/TestApexEngineModel.java
@@ -0,0 +1,102 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.model.enginemodel.handling;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.sql.Connection;
+import java.sql.DriverManager;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult;
+import org.onap.policy.apex.model.basicmodel.dao.DAOParameters;
+import org.onap.policy.apex.model.basicmodel.test.TestApexModel;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel;
+
+public class TestApexEngineModel {
+    private Connection connection;
+    TestApexModel<AxEngineModel> testApexModel;
+
+    @Before
+    public void setup() throws Exception {
+        Class.forName("org.apache.derby.jdbc.EmbeddedDriver").newInstance();
+        connection = DriverManager.getConnection("jdbc:derby:memory:apex_test;create=true");
+
+        testApexModel = new TestApexModel<AxEngineModel>(AxEngineModel.class, new TestApexEngineModelCreator());
+    }
+
+    @After
+    public void teardown() throws Exception {
+        connection.close();
+        new File("derby.log").delete();
+    }
+
+    @Test
+    public void testModelValid() throws Exception {
+        final AxValidationResult result = testApexModel.testApexModelValid();
+        assertTrue(result.toString().equals(VALID_MODEL_STRING));
+    }
+
+    @Test
+    public void testModelVaidateInvalidModel() throws Exception {
+        final AxValidationResult result = testApexModel.testApexModelVaidateInvalidModel();
+        assertTrue(result.toString().equals(INVALID_MODEL_STRING));
+    }
+
+    @Test
+    public void testModelVaidateMalstructured() throws Exception {
+        final AxValidationResult result = testApexModel.testApexModelVaidateMalstructured();
+        assertTrue(result.toString().equals(INVALID_MODEL_MALSTRUCTURED_STRING));
+    }
+
+    @Test
+    public void testModelWriteReadXML() throws Exception {
+        testApexModel.testApexModelWriteReadXML();
+    }
+
+    @Test
+    public void testModelWriteReadJSON() throws Exception {
+        testApexModel.testApexModelWriteReadJSON();
+    }
+
+    @Test
+    public void testModelWriteReadJPA() throws Exception {
+        final DAOParameters daoParameters = new DAOParameters();
+        daoParameters.setPluginClass("org.onap.policy.apex.model.basicmodel.dao.impl.DefaultApexDao");
+        daoParameters.setPersistenceUnit("DAOTest");
+
+        testApexModel.testApexModelWriteReadJPA(daoParameters);
+    }
+
+    private static final String VALID_MODEL_STRING = "***validation of model successful***";
+
+    private static final String INVALID_MODEL_STRING = "\n" + "***validation of model failed***\n"
+            + "AxArtifactKey:(name=AnEngine,version=0.0.1):org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel:INVALID:AxEngineModel - state is UNDEFINED\n"
+            + "********************************";
+
+    private static final String INVALID_MODEL_MALSTRUCTURED_STRING = "\n" + "***validation of model failed***\n"
+            + "AxArtifactKey:(name=AnEngine,version=0.0.1):org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel:INVALID:AxEngineModel - timestamp is not set\n"
+            + "AxArtifactKey:(name=AnEngine,version=0.0.1):org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel:INVALID:AxEngineModel - state is UNDEFINED\n"
+            + "********************************";
+}
diff --git a/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/handling/TestApexEngineModelCreator.java b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/handling/TestApexEngineModelCreator.java
new file mode 100644
index 000000000..4a4a0cc88
--- /dev/null
+++ b/model/engine-model/src/test/java/org/onap/policy/apex/model/enginemodel/handling/TestApexEngineModelCreator.java
@@ -0,0 +1,127 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * 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.
+ * 
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.apex.model.enginemodel.handling;
+
+import java.util.UUID;
+
+import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxKeyInfo;
+import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
+import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult;
+import org.onap.policy.apex.model.basicmodel.test.TestApexModelCreator;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbum;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextAlbums;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextSchema;
+import org.onap.policy.apex.model.contextmodel.concepts.AxContextSchemas;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineModel;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineState;
+import org.onap.policy.apex.model.enginemodel.concepts.AxEngineStats;
+
+public class TestApexEngineModelCreator implements TestApexModelCreator<AxEngineModel> {
+
+    @Override
+    public AxEngineModel getModel() {
+        final AxContextSchema schema0 = new AxContextSchema(new AxArtifactKey("StringType", "0.0.1"), "Java",
+                "org.onap.policy.apex.model.enginemodel.concepts.TestContextItem000");
+        final AxContextSchema schema1 = new AxContextSchema(new AxArtifactKey("MapType", "0.0.1"), "Java",
+                "org.onap.policy.apex.model.enginemodel.concepts.TestContextItem00A");
+
+        final AxContextSchemas schemas = new AxContextSchemas(new AxArtifactKey("ContextSchemas", "0.0.1"));
+        schemas.getSchemasMap().put(schema0.getKey(), schema0);
+        schemas.getSchemasMap().put(schema1.getKey(), schema1);
+
+        final AxContextAlbum album0 =
+                new AxContextAlbum(new AxArtifactKey("contextAlbum0", "0.0.1"), "APPLICATION", true, schema1.getKey());
+
+        final AxContextAlbums albums = new AxContextAlbums(new AxArtifactKey("context", "0.0.1"));
+        albums.getAlbumsMap().put(album0.getKey(), album0);
+
+        final AxEngineModel engineModel = new AxEngineModel(new AxArtifactKey("AnEngine", "0.0.1"));
+        engineModel.setSchemas(schemas);
+        engineModel.setAlbums(albums);
+        engineModel.setTimestamp(System.currentTimeMillis());
+        engineModel.setState(AxEngineState.EXECUTING);
+        engineModel.setStats(new AxEngineStats(new AxReferenceKey(engineModel.getKey(), "EngineStats"),
+                System.currentTimeMillis(), 100, 205, 200, 12345, 9876));
+        engineModel.getKeyInformation().generateKeyInfo(engineModel);
+
+        final AxValidationResult result = new AxValidationResult();
+        engineModel.validate(result);
+
+        return engineModel;
+    }
+
+    @Override
+    public AxEngineModel getInvalidModel() {
+        final AxEngineModel engineModel = getModel();
+
+        engineModel.setTimestamp(System.currentTimeMillis());
+        engineModel.setState(AxEngineState.UNDEFINED);
+        engineModel.setStats(new AxEngineStats(new AxReferenceKey(engineModel.getKey(), "EngineStats"),
+                System.currentTimeMillis(), 100, 205, 200, 12345, 9876));
+        engineModel.getKeyInformation().generateKeyInfo(engineModel);
+
+        return engineModel;
+    }
+
+    public AxEngineModel getMalstructuredModel() {
+        final AxEngineModel engineModel = getModel();
+
+        engineModel.setTimestamp(-1);
+        engineModel.setState(AxEngineState.UNDEFINED);
+
+        return engineModel;
+    }
+
+    @Override
+    public AxEngineModel getObservationModel() {
+        final AxEngineModel engineModel = getModel();
+
+        final AxContextSchema schema0 = new AxContextSchema(new AxArtifactKey("StringType", "0.0.1"), "Java",
+                "org.onap.policy.apex.model.enginemodel.concepts.TestContextItem000");
+        final AxContextSchema schema1 = new AxContextSchema(new AxArtifactKey("MapType", "0.0.1"), "Java",
+                "org.onap.policy.apex.model.enginemodel.concepts.TestContextItem00A");
+
+        engineModel.getKeyInformation().getKeyInfoMap().put(schema0.getKey(),
+                new AxKeyInfo(schema0.getKey(), UUID.fromString("00000000-0000-0000-0000-000000000001"), ""));
+        engineModel.getKeyInformation().getKeyInfoMap().put(schema1.getKey(),
+                new AxKeyInfo(schema1.getKey(), UUID.fromString("00000000-0000-0000-0000-000000000002"), ""));
+
+        return engineModel;
+    }
+
+    @Override
+    public AxEngineModel getWarningModel() {
+        final AxEngineModel engineModel = getModel();
+
+        final AxContextSchema schema0 = new AxContextSchema(new AxArtifactKey("StringType", "0.0.1"), "Java",
+                "org.onap.policy.apex.model.enginemodel.concepts.TestContextItem000");
+        final AxContextSchema schema1 = new AxContextSchema(new AxArtifactKey("MapType", "0.0.1"), "Java",
+                "org.onap.policy.apex.model.enginemodel.concepts.TestContextItem00A");
+
+        engineModel.getKeyInformation().getKeyInfoMap().put(schema0.getKey(),
+                new AxKeyInfo(schema0.getKey(), UUID.fromString("00000000-0000-0000-0000-000000000000"), ""));
+        engineModel.getKeyInformation().getKeyInfoMap().put(schema1.getKey(),
+                new AxKeyInfo(schema1.getKey(), UUID.fromString("00000000-0000-0000-0000-000000000001"), ""));
+
+        return engineModel;
+    }
+}