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diff --git a/src/test/java/org/onap/aai/modelloader/notification/TestArtifactDownloadManager.java b/src/test/java/org/onap/aai/modelloader/notification/TestArtifactDownloadManager.java
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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017-2018 European Software Marketing Ltd.
+ * ================================================================================
+ * 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.aai.modelloader.notification;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.CoreMatchers.not;
+import static org.hamcrest.collection.IsEmptyCollection.empty;
+import static org.junit.Assert.assertThat;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.onap.aai.modelloader.fixture.NotificationDataFixtureBuilder.getNotificationDataWithInvalidType;
+import static org.onap.aai.modelloader.fixture.NotificationDataFixtureBuilder.getNotificationDataWithModelQuerySpec;
+import static org.onap.aai.modelloader.fixture.NotificationDataFixtureBuilder.getNotificationDataWithOneOfEach;
+import static org.onap.aai.modelloader.fixture.NotificationDataFixtureBuilder.getNotificationDataWithOneService;
+import static org.onap.aai.modelloader.fixture.NotificationDataFixtureBuilder.getNotificationDataWithToscaCsarFile;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Properties;
+import org.hamcrest.collection.IsEmptyCollection;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Matchers;
+import org.mockito.Mockito;
+import org.mockito.internal.util.reflection.Whitebox;
+import org.onap.aai.babel.service.data.BabelArtifact;
+import org.onap.aai.modelloader.config.ModelLoaderConfig;
+import org.onap.aai.modelloader.entity.Artifact;
+import org.onap.aai.modelloader.entity.model.BabelArtifactParsingException;
+import org.onap.aai.modelloader.restclient.BabelServiceClient;
+import org.onap.aai.modelloader.restclient.BabelServiceClientException;
+import org.onap.aai.modelloader.service.BabelServiceClientFactory;
+import org.onap.aai.modelloader.service.HttpsBabelServiceClientFactory;
+import org.onap.aai.modelloader.util.ArtifactTestUtils;
+import org.onap.sdc.api.IDistributionClient;
+import org.onap.sdc.api.notification.IArtifactInfo;
+import org.onap.sdc.api.notification.INotificationData;
+import org.onap.sdc.api.results.IDistributionClientDownloadResult;
+import org.onap.sdc.impl.DistributionClientDownloadResultImpl;
+import org.onap.sdc.utils.DistributionActionResultEnum;
+
+/**
+ * Tests {@link ArtifactDownloadManager}.
+ */
+public class TestArtifactDownloadManager {
+
+    private ArtifactDownloadManager downloadManager;
+    private BabelServiceClient mockBabelClient;
+    private IDistributionClient mockDistributionClient;
+    private NotificationPublisher mockNotificationPublisher;
+    private BabelArtifactConverter mockBabelArtifactConverter;
+    private BabelServiceClientFactory mockClientFactory;
+
+    @Before
+    public void setup() throws Exception {
+        mockBabelClient = mock(BabelServiceClient.class);
+        mockDistributionClient = mock(IDistributionClient.class);
+        mockNotificationPublisher = mock(NotificationPublisher.class);
+        mockBabelArtifactConverter = mock(BabelArtifactConverter.class);
+        mockClientFactory = mock(HttpsBabelServiceClientFactory.class);
+        when(mockClientFactory.create(Mockito.any())).thenReturn(mockBabelClient);
+
+        Properties configProperties = new Properties();
+        configProperties.load(this.getClass().getClassLoader().getResourceAsStream("model-loader.properties"));
+        downloadManager = new ArtifactDownloadManager(mockDistributionClient,
+                new ModelLoaderConfig(configProperties, "."), mockClientFactory);
+
+        Whitebox.setInternalState(downloadManager, "notificationPublisher", mockNotificationPublisher);
+        Whitebox.setInternalState(downloadManager, "babelArtifactConverter", mockBabelArtifactConverter);
+    }
+
+    @After
+    public void tearDown() {
+        downloadManager = null;
+        mockDistributionClient = null;
+        mockNotificationPublisher = null;
+    }
+
+    /**
+     * Test downloading zero artifacts from SDC.
+     */
+    @Test
+    public void testDownloadWithZeroArtifacts() {
+        List<Artifact> modelFiles = new ArrayList<>();
+        List<Artifact> catalogFiles = new ArrayList<>();
+        assertThat(downloadManager.downloadArtifacts(getNotificationDataWithOneService(), new ArrayList<>(), modelFiles,
+                catalogFiles), is(true));
+        assertThat(modelFiles, is(empty()));
+        assertThat(catalogFiles, is(empty()));
+        Mockito.verifyZeroInteractions(mockBabelClient, mockDistributionClient, mockNotificationPublisher,
+                mockBabelArtifactConverter);
+    }
+
+    @Test
+    public void testArtifactDownloadFails() {
+        INotificationData data = getNotificationDataWithOneService();
+        IArtifactInfo artifact = data.getServiceArtifacts().get(0);
+        String errorMessage = "error msg";
+        when(mockDistributionClient.download(artifact)).thenReturn(
+                createDistributionClientDownloadResult(DistributionActionResultEnum.FAIL, errorMessage, null));
+        doNothing().when(mockNotificationPublisher).publishDownloadFailure(mockDistributionClient, data, artifact,
+                errorMessage);
+
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), null, null), is(false));
+
+        Mockito.verify(mockDistributionClient).download(artifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadFailure(mockDistributionClient, data, artifact,
+                errorMessage);
+
+        Mockito.verifyZeroInteractions(mockBabelClient, mockBabelArtifactConverter);
+    }
+
+    @Test
+    public void testErrorCreatingBabelClient() throws Exception {
+        when(mockClientFactory.create(Mockito.any())).thenThrow(new BabelServiceClientException(new Exception()));
+
+        INotificationData data = getNotificationDataWithToscaCsarFile();
+        IArtifactInfo artifactInfo = data.getServiceArtifacts().get(0);
+        setupValidDownloadCsarMocks(data, artifactInfo, new ArtifactTestUtils());
+        doNothing().when(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifactInfo);
+
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), null, null), is(false));
+
+        Mockito.verify(mockDistributionClient).download(artifactInfo);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifactInfo);
+        Mockito.verify(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifactInfo);
+
+        Mockito.verifyZeroInteractions(mockBabelArtifactConverter);
+    }
+
+    @Test
+    public void downloadArtifacts_invalidToscaCsarFile() throws IOException, BabelServiceClientException {
+        INotificationData data = getNotificationDataWithToscaCsarFile();
+        IArtifactInfo artifact = data.getServiceArtifacts().get(0);
+        when(mockDistributionClient.download(artifact)).thenReturn(createDistributionClientDownloadResult(
+                DistributionActionResultEnum.SUCCESS, null, "This is not a valid Tosca CSAR File".getBytes()));
+        doNothing().when(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+        when(mockBabelClient.postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString())).thenThrow(new BabelServiceClientException(""));
+        doNothing().when(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifact);
+
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), null, null), is(false));
+
+        Mockito.verify(mockDistributionClient).download(artifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+        Mockito.verify(mockBabelClient).postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString());
+        Mockito.verify(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifact);
+
+        Mockito.verifyZeroInteractions(mockBabelArtifactConverter);
+
+    }
+
+    @Test
+    public void downloadArtifacts_invalidModelQuerySpec() {
+        INotificationData data = getNotificationDataWithModelQuerySpec();
+        IArtifactInfo artifact = data.getServiceArtifacts().get(0);
+
+        List<org.onap.aai.modelloader.entity.Artifact> modelArtifacts = new ArrayList<>();
+
+        when(mockDistributionClient.download(artifact)).thenReturn(createDistributionClientDownloadResult(
+                DistributionActionResultEnum.SUCCESS, null, "This is not a valid Model Query Spec".getBytes()));
+        doNothing().when(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), modelArtifacts, null),
+                is(false));
+
+        Mockito.verify(mockDistributionClient).download(artifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+        Mockito.verify(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifact);
+
+        Mockito.verifyZeroInteractions(mockBabelClient, mockBabelArtifactConverter);
+    }
+
+    @Test
+    public void downloadArtifacts_validToscaCsarFile()
+            throws IOException, BabelServiceClientException, BabelArtifactParsingException {
+        INotificationData data = getNotificationDataWithToscaCsarFile();
+        IArtifactInfo artifactInfo = data.getServiceArtifacts().get(0);
+
+        setupValidDownloadCsarMocks(data, artifactInfo, new ArtifactTestUtils());
+
+        List<org.onap.aai.modelloader.entity.Artifact> modelArtifacts = new ArrayList<>();
+        List<org.onap.aai.modelloader.entity.Artifact> catalogFiles = new ArrayList<>();
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), modelArtifacts, catalogFiles),
+                is(true));
+        assertThat(catalogFiles.size(), is(0));
+
+        Mockito.verify(mockDistributionClient).download(artifactInfo);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifactInfo);
+        Mockito.verify(mockBabelClient).postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString());
+        Mockito.verify(mockBabelArtifactConverter).convertToModel(Matchers.any());
+        Mockito.verify(mockBabelArtifactConverter).convertToCatalog(Matchers.any());
+    }
+
+    private void setupValidDownloadCsarMocks(INotificationData data, IArtifactInfo artifactInfo,
+            ArtifactTestUtils artifactTestUtils) throws IOException, BabelServiceClientException {
+        when(mockDistributionClient.download(artifactInfo))
+                .thenReturn(createDistributionClientDownloadResult(DistributionActionResultEnum.SUCCESS, null,
+                        artifactTestUtils.loadResource("compressedArtifacts/service-VscpaasTest-csar.csar")));
+        when(mockBabelClient.postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString())).thenReturn(createBabelArtifacts());
+    }
+
+    private List<BabelArtifact> createBabelArtifacts() {
+        List<BabelArtifact> artifactList = new ArrayList<>();
+        artifactList.add(new BabelArtifact("ModelArtifact", BabelArtifact.ArtifactType.MODEL, "Some model payload"));
+        artifactList.add(new BabelArtifact("VNFCArtifact", BabelArtifact.ArtifactType.VNFCATALOG, "Some VNFC payload"));
+        return artifactList;
+    }
+
+    @Test
+    public void downloadArtifactsWithValidModelQuerySpec()
+            throws IOException, BabelServiceClientException, BabelArtifactParsingException {
+        INotificationData data = getNotificationDataWithModelQuerySpec();
+        IArtifactInfo artifact = data.getServiceArtifacts().get(0);
+        setupValidModelQuerySpecMocks(new ArtifactTestUtils(), data, artifact);
+
+        List<org.onap.aai.modelloader.entity.Artifact> modelFiles = new ArrayList<>();
+        List<org.onap.aai.modelloader.entity.Artifact> catalogFiles = new ArrayList<>();
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), modelFiles, catalogFiles),
+                is(true));
+
+        assertThat(modelFiles, is(not(IsEmptyCollection.empty())));
+        assertThat(catalogFiles, is(empty()));
+
+        Mockito.verify(mockDistributionClient).download(artifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+
+        Mockito.verifyZeroInteractions(mockBabelClient, mockBabelArtifactConverter);
+    }
+
+    private void setupValidModelQuerySpecMocks(ArtifactTestUtils artifactTestUtils, INotificationData data,
+            IArtifactInfo artifact) throws IOException {
+        when(mockDistributionClient.download(artifact))
+                .thenReturn(createDistributionClientDownloadResult(DistributionActionResultEnum.SUCCESS, null,
+                        artifactTestUtils.loadResource("models/named-query-wan-connector.xml")));
+        doNothing().when(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+    }
+
+    @Test
+    public void downloadArtifacts_validCsarAndModelFiles()
+            throws IOException, BabelServiceClientException, BabelArtifactParsingException {
+        ArtifactTestUtils artifactTestUtils = new ArtifactTestUtils();
+        INotificationData data = getNotificationDataWithOneOfEach();
+        List<IArtifactInfo> artifacts = new ArrayList<>();
+
+        IArtifactInfo serviceArtifact = data.getServiceArtifacts().get(0);
+        IArtifactInfo modelSpecArtifact = data.getResources().get(1).getArtifacts().get(0);
+
+        artifacts.add(serviceArtifact);
+        artifacts.add(modelSpecArtifact);
+
+        setupValidDownloadCsarMocks(data, serviceArtifact, artifactTestUtils);
+        setupValidModelQuerySpecMocks(artifactTestUtils, data, modelSpecArtifact);
+
+        List<org.onap.aai.modelloader.entity.Artifact> modelFiles = new ArrayList<>();
+        List<org.onap.aai.modelloader.entity.Artifact> catalogFiles = new ArrayList<>();
+        assertThat(downloadManager.downloadArtifacts(data, artifacts, modelFiles, catalogFiles), is(true));
+
+        Mockito.verify(mockDistributionClient).download(serviceArtifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, serviceArtifact);
+        Mockito.verify(mockBabelClient).postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString());
+        Mockito.verify(mockBabelArtifactConverter).convertToModel(Matchers.any());
+        Mockito.verify(mockBabelArtifactConverter).convertToCatalog(Matchers.any());
+
+        Mockito.verify(mockDistributionClient).download(modelSpecArtifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data,
+                modelSpecArtifact);
+
+        Mockito.verifyNoMoreInteractions(mockBabelClient, mockBabelArtifactConverter);
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    public void activateCallback_toscaToModelConverterHasProcessToscaArtifactsException() throws Exception {
+        ArtifactTestUtils artifactTestUtils = new ArtifactTestUtils();
+        INotificationData data = getNotificationDataWithToscaCsarFile();
+        IArtifactInfo artifactInfo = data.getServiceArtifacts().get(0);
+
+        when(mockDistributionClient.download(artifactInfo))
+                .thenReturn(createDistributionClientDownloadResult(DistributionActionResultEnum.SUCCESS, null,
+                        artifactTestUtils.loadResource("compressedArtifacts/service-VscpaasTest-csar.csar")));
+        when(mockBabelArtifactConverter.convertToModel(Mockito.anyList()))
+                .thenThrow(BabelArtifactParsingException.class);
+        doNothing().when(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifactInfo);
+        when(mockBabelClient.postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString())).thenReturn(createBabelArtifacts());
+
+        List<Artifact> modelArtifacts = new ArrayList<>();
+        List<Artifact> catalogFiles = new ArrayList<>();
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), modelArtifacts, catalogFiles),
+                is(false));
+        assertThat(modelArtifacts, is(empty()));
+        assertThat(catalogFiles, is(empty()));
+
+        Mockito.verify(mockDistributionClient).download(artifactInfo);
+        Mockito.verify(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifactInfo);
+        Mockito.verify(mockBabelClient).postArtifact(Matchers.any(), Matchers.anyString(), Matchers.anyString(),
+                Matchers.anyString());
+        Mockito.verify(mockBabelArtifactConverter).convertToModel(Matchers.any());
+    }
+
+    @Test
+    public void downloadArtifactsWithInvalidType()
+            throws IOException, BabelServiceClientException, BabelArtifactParsingException {
+        INotificationData data = getNotificationDataWithInvalidType();
+        IArtifactInfo artifact = data.getServiceArtifacts().get(0);
+
+        when(mockDistributionClient.download(artifact)).thenReturn(createDistributionClientDownloadResult(
+                DistributionActionResultEnum.SUCCESS, null, "This content does not matter.".getBytes()));
+        doNothing().when(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+
+        assertThat(downloadManager.downloadArtifacts(data, data.getServiceArtifacts(), null, new ArrayList<>()),
+                is(false));
+        Mockito.verify(mockDistributionClient).download(artifact);
+        Mockito.verify(mockNotificationPublisher).publishDownloadSuccess(mockDistributionClient, data, artifact);
+        Mockito.verify(mockNotificationPublisher).publishDeployFailure(mockDistributionClient, data, artifact);
+        Mockito.verifyZeroInteractions(mockBabelClient, mockBabelArtifactConverter);
+    }
+
+    private IDistributionClientDownloadResult createDistributionClientDownloadResult(
+            DistributionActionResultEnum status, String message, byte[] payload) {
+        DistributionClientDownloadResultImpl downloadResult = new DistributionClientDownloadResultImpl(status, message);
+        downloadResult.setArtifactPayload(payload);
+        return downloadResult;
+    }
+}