--- /dev/null
+/**
+ * Copyright 2016-2017 ZTE Corporation.
+ *
+ * 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.onap.usecaseui.server.service.lcm.impl;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.onap.usecaseui.server.bean.lcm.ServiceTemplateInput;
+import org.onap.usecaseui.server.bean.lcm.ServiceTemplateInputRsp;
+import org.onap.usecaseui.server.bean.lcm.TemplateInput;
+import org.onap.usecaseui.server.service.lcm.ServiceTemplateService;
+import org.onap.usecaseui.server.service.lcm.domain.aai.AAIService;
+import org.onap.usecaseui.server.service.lcm.domain.aai.bean.VimInfo;
+import org.onap.usecaseui.server.service.lcm.domain.sdc.SDCCatalogService;
+import org.onap.usecaseui.server.service.lcm.domain.sdc.bean.SDCServiceTemplate;
+import org.onap.usecaseui.server.service.lcm.domain.sdc.exceptions.SDCCatalogException;
+import org.openecomp.sdc.toscaparser.api.NodeTemplate;
+import org.openecomp.sdc.toscaparser.api.ToscaTemplate;
+import org.openecomp.sdc.toscaparser.api.common.JToscaException;
+import org.openecomp.sdc.toscaparser.api.elements.Metadata;
+import org.openecomp.sdc.toscaparser.api.parameters.Input;
+import retrofit2.Call;
+
+import java.io.IOException;
+import java.util.*;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.onap.usecaseui.server.service.lcm.domain.sdc.consts.SDCConsts.CATEGORY_E2E_SERVICE;
+import static org.onap.usecaseui.server.service.lcm.domain.sdc.consts.SDCConsts.DISTRIBUTION_STATUS_DISTRIBUTED;
+import static org.onap.usecaseui.server.util.CallStub.failedCall;
+import static org.onap.usecaseui.server.util.CallStub.successfulCall;
+
+public class DefaultServiceTemplateServiceTest {
+
+    @Test
+    public void itCanListDistributedServiceTemplate() {
+        List<SDCServiceTemplate> templates = Collections.singletonList(new SDCServiceTemplate("uuid", "uuid", "name", "url", "category"));
+        SDCCatalogService sdcService = mock(SDCCatalogService.class);
+        when(sdcService.listServices(CATEGORY_E2E_SERVICE, DISTRIBUTION_STATUS_DISTRIBUTED)).thenReturn(successfulCall(templates));
+
+        ServiceTemplateService service = new DefaultServiceTemplateService(sdcService,null);
+
+        Assert.assertSame(templates, service.listDistributedServiceTemplate());
+    }
+
+    @Test(expected = SDCCatalogException.class)
+    public void retrieveServiceWillThrowExceptionWhenSDCIsNotAvailable() {
+        SDCCatalogService sdcService = mock(SDCCatalogService.class);
+        when(sdcService.listServices(CATEGORY_E2E_SERVICE, DISTRIBUTION_STATUS_DISTRIBUTED)).thenReturn(failedCall("SDC is not available!"));
+
+        ServiceTemplateService service = new DefaultServiceTemplateService(sdcService,null);
+        service.listDistributedServiceTemplate();
+    }
+
+    @Test
+    public void itCanRetrieveInputsFromServiceTemplate() throws IOException {
+        final String uuid = "1";
+        String modelPath = "model_path";
+        String nodeUUID = "2";
+
+        SDCCatalogService sdcService = newSdcCatalogService(nodeUUID);
+
+        List<VimInfo> vim = Collections.singletonList(new VimInfo("owner", "regionId"));
+        AAIService aaiService = newAAIService(vim);
+
+        ServiceTemplateService service = newServiceTemplateService(uuid, nodeUUID, sdcService, aaiService);
+
+        Assert.assertThat(service.fetchServiceTemplateInput(uuid, modelPath), equalTo(new ServiceTemplateInputRsp(expectedServiceInputs(uuid, nodeUUID),vim)));
+    }
+
+    private DefaultServiceTemplateService newServiceTemplateService(String uuid, String nodeUUID, SDCCatalogService sdcService, AAIService aaiService) {
+        return new DefaultServiceTemplateService(sdcService, aaiService) {
+
+            @Override
+            protected void downloadFile(String templateUrl, String toPath) throws IOException {
+                // download successfully...
+            }
+
+            @Override
+            protected ToscaTemplate translateToToscaTemplate(String toPath) throws JToscaException {
+                if (toPath.contains(uuid)) {
+                    return e2eToscaTemplate(nodeUUID);
+                }
+                return nodeToscaTemplate(nodeUUID);
+            }
+        };
+    }
+
+    private SDCCatalogService newSdcCatalogService(String nodeUUID) throws IOException {
+        SDCCatalogService sdcService = mock(SDCCatalogService.class);
+        when(sdcService.getService(nodeUUID)).thenReturn(successfulCall(new SDCServiceTemplate(nodeUUID, nodeUUID, "node", "nodeModelUrl", "service")));
+        return sdcService;
+    }
+
+    private List<ServiceTemplateInput> expectedServiceInputs(String uuid, String nodeUUID) {
+        ServiceTemplateInput e2eServiceTemplateInput = new ServiceTemplateInput(
+                uuid, uuid, "VoLTE", "service", "VoLTE", "service", "", Collections.EMPTY_LIST);
+        TemplateInput templateInput = new TemplateInput("field_name","field_type", "field_description", "true", "field_default");
+        ServiceTemplateInput nodeTemplateInput = new ServiceTemplateInput(
+                nodeUUID, nodeUUID, "", "", "", "service", "", Collections.singletonList(templateInput));
+        return Arrays.asList(e2eServiceTemplateInput, nodeTemplateInput);
+    }
+
+    private ToscaTemplate e2eToscaTemplate(String nodeUUID) {
+        ToscaTemplate toscaTemplate = mock(ToscaTemplate.class);
+        Map<String, Object> e2eAttributes = new HashMap<>();
+        e2eAttributes.put("invariantUUID", "1");
+        e2eAttributes.put("UUID", "1");
+        e2eAttributes.put("name", "VoLTE");
+        e2eAttributes.put("type", "service");
+        e2eAttributes.put("description", "VoLTE");
+        e2eAttributes.put("category", "service");
+        e2eAttributes.put("subcategory", "");
+        when(toscaTemplate.getMetaData()).thenReturn(new Metadata(e2eAttributes));
+        when(toscaTemplate.getInputs()).thenReturn(new ArrayList<>());
+        NodeTemplate nodeTemplate = mock(NodeTemplate.class);
+
+        Map<String, Object> nodeUUIDAttr = new HashMap<>();
+
+        nodeUUIDAttr.put("UUID", nodeUUID);
+        when(nodeTemplate.getMetaData()).thenReturn(new Metadata(nodeUUIDAttr));
+
+        ArrayList<NodeTemplate> nodeTemplates = new ArrayList<>();
+        nodeTemplates.add(nodeTemplate);
+        when(toscaTemplate.getNodeTemplates()).thenReturn(nodeTemplates);
+
+        return toscaTemplate;
+    }
+
+    private ToscaTemplate nodeToscaTemplate(String nodeUUID) {
+        ToscaTemplate toscaTemplate = mock(ToscaTemplate.class);
+        Map<String, Object> Attributes = new HashMap<>();
+        Attributes.put("invariantUUID", nodeUUID);
+        Attributes.put("UUID", nodeUUID);
+        Attributes.put("name", "");
+        Attributes.put("type", "");
+        Attributes.put("description", "");
+        Attributes.put("category", "service");
+        Attributes.put("subcategory", "");
+        when(toscaTemplate.getMetaData()).thenReturn(new Metadata(Attributes));
+
+        Input input = mock(Input.class);
+        when(input.getName()).thenReturn("field_name");
+        when(input.getDescription()).thenReturn("field_description");
+        when(input.getType()).thenReturn("field_type");
+        when(input.getDefault()).thenReturn("field_default");
+        when(input.isRequired()).thenReturn(true);
+
+        ArrayList<Input> inputs = new ArrayList<>();
+        inputs.add(input);
+        when(toscaTemplate.getInputs()).thenReturn(inputs);
+        when(toscaTemplate.getNodeTemplates()).thenReturn(new ArrayList<>());
+
+        return toscaTemplate;
+    }
+
+    private AAIService newAAIService(List<VimInfo> vim) {
+        AAIService aaiService = mock(AAIService.class);
+
+        Call<List<VimInfo>> vimCall = successfulCall(vim);
+        when(aaiService.listVimInfo()).thenReturn(vimCall);
+        return aaiService;
+    }
+
+    @Test(expected = SDCCatalogException.class)
+    public void retrieveInputsWillThrowExceptionWhenDownloadFailed() {
+        ServiceTemplateService service = new DefaultServiceTemplateService() {
+            @Override
+            protected void downloadFile(String templateUrl, String toPath) throws IOException {
+                throw new IOException("download failed!");
+            }
+        };
+        service.fetchServiceTemplateInput("1", "url");
+    }
+
+    @Test(expected = SDCCatalogException.class)
+    public void retrieveInputsWillThrowExceptionWhenParsingToscaTemplateFailed() {
+        ServiceTemplateService service = new DefaultServiceTemplateService() {
+            @Override
+            protected void downloadFile(String templateUrl, String toPath) throws IOException {
+                // download successfully...
+            }
+
+            @Override
+            protected ToscaTemplate translateToToscaTemplate(String toPath) throws JToscaException {
+                throw new JToscaException("parse tosca template failed!", "123");
+            }
+        };
+        service.fetchServiceTemplateInput("1", "url");
+    }
+}
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