Add Support for creating model type

Add new vertex type called "model" was added to represent models
Add new edge type called MODEL_ELEMENT was added to connect a tosca type to a model
Add new edge type called MODEL was added to connect a resource/service to the model it is based on

Issue-ID: SDC-3596
Signed-off-by: MichaelMorris <michael.morris@est.tech>
Signed-off-by: aribeiro <anderson.ribeiro@est.tech>
Change-Id: I310e14d0cf5a9ca0eb0bda592efe8a3baf73749c

6 files changed, 469 insertions, 1 deletions

diff --git a/catalog-be/pom.xml b/catalog-be/pom.xml
index c156b96178..d12e7c18cc 100644
--- a/catalog-be/pom.xml
+++ b/catalog-be/pom.xml
@@ -845,6 +845,13 @@
                 </exclusion>
             </exclusions>
         </dependency>
+
+        <dependency>
+            <groupId>com.googlecode.jmapper-framework</groupId>
+            <artifactId>jmapper-core</artifactId>
+            <version>${jMapper.version}</version>
+        </dependency>
+
     </dependencies>
 
     <build>
diff --git a/catalog-be/src/main/docker/backend/chef-repo/cookbooks/sdc-catalog-be/files/default/error-configuration.yaml b/catalog-be/src/main/docker/backend/chef-repo/cookbooks/sdc-catalog-be/files/default/error-configuration.yaml
index b49c111c79..2c6a0c852b 100644
--- a/catalog-be/src/main/docker/backend/chef-repo/cookbooks/sdc-catalog-be/files/default/error-configuration.yaml
+++ b/catalog-be/src/main/docker/backend/chef-repo/cookbooks/sdc-catalog-be/files/default/error-configuration.yaml
@@ -2464,4 +2464,12 @@ errors:
         code: 500,
         message: "An unexpected error occurred while updating the capability '%1'.",
         messageId: "SVC4143"
-    }
\ No newline at end of file
+    }
+
+    #---------SVC4144------------------------------
+    # %1 - "Model name"
+    MODEL_ALREADY_EXISTS: {
+        code: 409,
+        message: "Error: Model name '%1' already exists.",
+        messageId: "SVC4144"
+    }
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ModelBusinessLogic.java b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ModelBusinessLogic.java
new file mode 100644
index 0000000000..1ef4cef701
--- /dev/null
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ModelBusinessLogic.java
@@ -0,0 +1,43 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+package org.openecomp.sdc.be.components.impl;
+
+import org.openecomp.sdc.be.model.Model;
+import org.openecomp.sdc.be.model.operations.impl.ModelOperation;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component("modelBusinessLogic")
+public class ModelBusinessLogic {
+
+    private static final Logger log = LoggerFactory.getLogger(ModelBusinessLogic.class);
+    private final ModelOperation modelOperation;
+
+    @Autowired
+    public ModelBusinessLogic(final ModelOperation modelOperation) {
+        this.modelOperation = modelOperation;
+    }
+
+    public Model createModel(final Model model) {
+        log.debug("createModel: creating model {}", model);
+        return modelOperation.createModel(model, false);
+    }
+}
\ No newline at end of file
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/servlets/ModelServlet.java b/catalog-be/src/main/java/org/openecomp/sdc/be/servlets/ModelServlet.java
new file mode 100644
index 0000000000..f4fc883b4c
--- /dev/null
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/servlets/ModelServlet.java
@@ -0,0 +1,122 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+package org.openecomp.sdc.be.servlets;
+
+import com.googlecode.jmapper.JMapper;
+import com.jcabi.aspects.Loggable;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.media.ArraySchema;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.servers.Server;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import java.util.Arrays;
+import javax.inject.Inject;
+import javax.validation.Valid;
+import javax.validation.constraints.NotNull;
+import javax.ws.rs.Consumes;
+import javax.ws.rs.HeaderParam;
+import javax.ws.rs.POST;
+import javax.ws.rs.Path;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import org.openecomp.sdc.be.components.impl.ComponentInstanceBusinessLogic;
+import org.openecomp.sdc.be.components.impl.ModelBusinessLogic;
+import org.openecomp.sdc.be.components.impl.ResourceImportManager;
+import org.openecomp.sdc.be.components.impl.aaf.AafPermission;
+import org.openecomp.sdc.be.components.impl.aaf.PermissionAllowed;
+import org.openecomp.sdc.be.components.validation.UserValidations;
+import org.openecomp.sdc.be.config.BeEcompErrorManager;
+import org.openecomp.sdc.be.dao.api.ActionStatus;
+import org.openecomp.sdc.be.exception.BusinessException;
+import org.openecomp.sdc.be.impl.ComponentsUtils;
+import org.openecomp.sdc.be.impl.ServletUtils;
+import org.openecomp.sdc.be.model.Model;
+import org.openecomp.sdc.be.ui.model.ModelCreateRequest;
+import org.openecomp.sdc.be.user.Role;
+import org.openecomp.sdc.be.user.UserBusinessLogic;
+import org.openecomp.sdc.common.api.Constants;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestBody;
+
+/**
+ * Root resource (exposed at "/" path)
+ */
+@Loggable(prepend = true, value = Loggable.DEBUG, trim = false)
+@Path("/v1/catalog")
+@Tag(name = "SDCE-2 APIs")
+@Server(url = "/sdc2/rest")
+@Controller
+public class ModelServlet extends AbstractValidationsServlet {
+
+    private static final Logger log = LoggerFactory.getLogger(ModelServlet.class);
+    private final ModelBusinessLogic modelBusinessLogic;
+    private final UserValidations userValidations;
+
+    @Inject
+    public ModelServlet(final UserBusinessLogic userBusinessLogic, final ComponentInstanceBusinessLogic componentInstanceBL,
+                        final ComponentsUtils componentsUtils, final ServletUtils servletUtils, final ResourceImportManager resourceImportManager,
+                        final ModelBusinessLogic modelBusinessLogic, final UserValidations userValidations) {
+        super(userBusinessLogic, componentInstanceBL, componentsUtils, servletUtils, resourceImportManager);
+        this.modelBusinessLogic = modelBusinessLogic;
+        this.userValidations = userValidations;
+    }
+
+    @POST
+    @Path("/model")
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    @Operation(description = "Create model", method = "POST", summary = "Returns created model", responses = {
+        @ApiResponse(content = @Content(array = @ArraySchema(schema = @Schema(implementation = Response.class)))),
+        @ApiResponse(responseCode = "201", description = "Model created"),
+        @ApiResponse(responseCode = "403", description = "Restricted operation"),
+        @ApiResponse(responseCode = "400", description = "Invalid content / Missing content"),
+        @ApiResponse(responseCode = "409", description = "Resource already exists")})
+    @PermissionAllowed(AafPermission.PermNames.INTERNAL_ALL_VALUE)
+    public Response createModel(@Parameter(description = "model to be created", required = true)
+                                    @Valid @RequestBody @NotNull final ModelCreateRequest modelCreateRequest,
+                                @HeaderParam(value = Constants.USER_ID_HEADER) String userId) {
+
+        validateUser(userId);
+        try {
+            final Model modelCreateResponse = modelBusinessLogic
+                .createModel(new JMapper<>(Model.class, ModelCreateRequest.class).getDestination(modelCreateRequest));
+            return buildOkResponse(getComponentsUtils().getResponseFormat(ActionStatus.CREATED),
+                RepresentationUtils.toRepresentation(modelCreateResponse));
+        } catch (final BusinessException e) {
+            throw e;
+        } catch (final Exception e) {
+            var errorMsg = String
+                .format("Unexpected error while creating model '%s'", modelCreateRequest.getName());
+            BeEcompErrorManager.getInstance().logBeRestApiGeneralError(errorMsg);
+            log.error(errorMsg, e);
+            return buildErrorResponse(getComponentsUtils().getResponseFormat(ActionStatus.GENERAL_ERROR));
+        }
+    }
+
+    private void validateUser(final String userId) {
+        userValidations.validateUserRole(userValidations.validateUserExists(userId), Arrays.asList(Role.DESIGNER, Role.ADMIN));
+    }
+
+}
diff --git a/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ModelBusinessLogicTest.java b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ModelBusinessLogicTest.java
new file mode 100644
index 0000000000..6c7bd5323f
--- /dev/null
+++ b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ModelBusinessLogicTest.java
@@ -0,0 +1,80 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+package org.openecomp.sdc.be.components.impl;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.Mockito.when;
+
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.MethodOrderer.OrderAnnotation;
+import org.junit.jupiter.api.Order;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestInstance.Lifecycle;
+import org.junit.jupiter.api.TestMethodOrder;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.openecomp.sdc.be.dao.api.ActionStatus;
+import org.openecomp.sdc.be.exception.BusinessException;
+import org.openecomp.sdc.be.model.Model;
+import org.openecomp.sdc.be.model.jsonjanusgraph.operations.exception.OperationException;
+import org.openecomp.sdc.be.model.operations.impl.ModelOperation;
+
+@TestInstance(Lifecycle.PER_CLASS)
+@TestMethodOrder(OrderAnnotation.class)
+class ModelBusinessLogicTest {
+
+    @InjectMocks
+    private ModelBusinessLogic modelBusinessLogic;
+    @Mock
+    private ModelOperation modelOperation;
+    private Model model;
+
+    @BeforeAll
+    void setup() {
+        MockitoAnnotations.openMocks(this);
+        initTestData();
+    }
+
+    private void initTestData() {
+        model = new Model("ETSI-SDC-MODEL-TEST");
+    }
+
+    @Test
+    @Order(1)
+    void createModelTest() {
+        when(modelOperation.createModel(model, false)).thenReturn(model);
+        final Model result = modelBusinessLogic.createModel(model);
+        assertThat(result).isNotNull();
+        assertThat(result.getName()).isEqualTo(model.getName());
+    }
+
+    @Test
+    @Order(2)
+    void createModelFailTest() {
+        when(modelOperation.createModel(model, false))
+            .thenThrow(new OperationException(ActionStatus.MODEL_ALREADY_EXISTS, model.getName()));
+        final BusinessException exception = assertThrows(BusinessException.class, () -> modelBusinessLogic.createModel(model));
+        assertThat(((OperationException) exception).getActionStatus().name()).isEqualTo(ActionStatus.MODEL_ALREADY_EXISTS.name());
+        assertThat(((OperationException) exception).getParams()).contains(model.getName());
+    }
+
+}
\ No newline at end of file
diff --git a/catalog-be/src/test/java/org/openecomp/sdc/be/servlets/ModelServletTest.java b/catalog-be/src/test/java/org/openecomp/sdc/be/servlets/ModelServletTest.java
new file mode 100644
index 0000000000..34201d3c1f
--- /dev/null
+++ b/catalog-be/src/test/java/org/openecomp/sdc/be/servlets/ModelServletTest.java
@@ -0,0 +1,208 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+package org.openecomp.sdc.be.servlets;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.when;
+
+import javax.servlet.ServletContext;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpSession;
+import javax.validation.ConstraintViolationException;
+import javax.ws.rs.core.Response;
+import org.apache.commons.lang3.StringUtils;
+import org.eclipse.jetty.http.HttpStatus;
+import org.glassfish.hk2.utilities.binding.AbstractBinder;
+import org.glassfish.jersey.server.ResourceConfig;
+import org.glassfish.jersey.test.JerseyTest;
+import org.glassfish.jersey.test.TestProperties;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestInstance.Lifecycle;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.openecomp.sdc.be.components.impl.ComponentInstanceBusinessLogic;
+import org.openecomp.sdc.be.components.impl.ModelBusinessLogic;
+import org.openecomp.sdc.be.components.impl.ResourceImportManager;
+import org.openecomp.sdc.be.components.validation.UserValidations;
+import org.openecomp.sdc.be.config.ConfigurationManager;
+import org.openecomp.sdc.be.config.SpringConfig;
+import org.openecomp.sdc.be.dao.api.ActionStatus;
+import org.openecomp.sdc.be.exception.BusinessException;
+import org.openecomp.sdc.be.impl.ComponentsUtils;
+import org.openecomp.sdc.be.impl.ServletUtils;
+import org.openecomp.sdc.be.impl.WebAppContextWrapper;
+import org.openecomp.sdc.be.model.Model;
+import org.openecomp.sdc.be.ui.model.ModelCreateRequest;
+import org.openecomp.sdc.be.user.UserBusinessLogic;
+import org.openecomp.sdc.common.api.ConfigurationSource;
+import org.openecomp.sdc.common.api.Constants;
+import org.openecomp.sdc.common.impl.ExternalConfiguration;
+import org.openecomp.sdc.common.impl.FSConfigurationSource;
+import org.openecomp.sdc.exception.ResponseFormat;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.web.context.WebApplicationContext;
+
+@TestInstance(Lifecycle.PER_CLASS)
+class ModelServletTest extends JerseyTest {
+
+    private static final String USER_ID = "cs0008";
+
+    @Mock
+    private HttpServletRequest request;
+    @Mock
+    private HttpSession session;
+    @Mock
+    private ServletContext servletContext;
+    @Mock
+    private WebAppContextWrapper webAppContextWrapper;
+    @Mock
+    private WebApplicationContext webApplicationContext;
+    @Mock
+    private UserBusinessLogic userBusinessLogic;
+    @Mock
+    private ComponentInstanceBusinessLogic componentInstanceBusinessLogic;
+    @Mock
+    private ComponentsUtils componentsUtils;
+    @Mock
+    private ServletUtils servletUtils;
+    @Mock
+    private ResourceImportManager resourceImportManager;
+    @Mock
+    private ModelBusinessLogic modelBusinessLogic;
+    @InjectMocks
+    private ModelServlet modelServlet;
+    @Mock
+    private ResponseFormat responseFormat;
+    @Mock
+    private UserValidations userValidations;
+
+    private Model model;
+    private Response response;
+    private ModelCreateRequest modelCreateRequest;
+
+    @BeforeAll
+    public void initClass() {
+        MockitoAnnotations.openMocks(this);
+        when(request.getSession()).thenReturn(session);
+        when(session.getServletContext()).thenReturn(servletContext);
+        when(servletContext.getAttribute(Constants.WEB_APPLICATION_CONTEXT_WRAPPER_ATTR))
+            .thenReturn(webAppContextWrapper);
+        when(webAppContextWrapper.getWebAppContext(servletContext)).thenReturn(webApplicationContext);
+        when(webApplicationContext.getBean(ModelBusinessLogic.class)).thenReturn(modelBusinessLogic);
+        when(request.getHeader(Constants.USER_ID_HEADER)).thenReturn(USER_ID);
+        when(webApplicationContext.getBean(ServletUtils.class)).thenReturn(servletUtils);
+        when(servletUtils.getComponentsUtils()).thenReturn(componentsUtils);
+        final String appConfigDir = "src/test/resources/config/catalog-be";
+        final ConfigurationSource configurationSource = new FSConfigurationSource(ExternalConfiguration.getChangeListener(), appConfigDir);
+        final ConfigurationManager configurationManager = new ConfigurationManager(configurationSource);
+        final org.openecomp.sdc.be.config.Configuration configuration = new org.openecomp.sdc.be.config.Configuration();
+        configuration.setJanusGraphInMemoryGraph(true);
+        configurationManager.setConfiguration(configuration);
+        ExternalConfiguration.setAppName("catalog-be");
+    }
+
+    @BeforeEach
+    void resetMock() throws Exception {
+        super.setUp();
+        initTestData();
+    }
+
+    @AfterEach
+    void after() throws Exception {
+        super.tearDown();
+    }
+
+    private void initTestData() {
+        final String modelName = "MY-INTEGRATION-TEST-MODEL";
+        model = new Model(modelName);
+        modelCreateRequest = new ModelCreateRequest();
+        modelCreateRequest.setName(modelName);
+    }
+
+    @Override
+    protected ResourceConfig configure() {
+        forceSet(TestProperties.CONTAINER_PORT, "0");
+        final ApplicationContext context = new AnnotationConfigApplicationContext(SpringConfig.class);
+        return new ResourceConfig(ModelServlet.class)
+            .register(new AbstractBinder() {
+                @Override
+                protected void configure() {
+                    bind(request).to(HttpServletRequest.class);
+                    bind(userBusinessLogic).to(UserBusinessLogic.class);
+                    bind(componentInstanceBusinessLogic).to(ComponentInstanceBusinessLogic.class);
+                    bind(componentsUtils).to(ComponentsUtils.class);
+                    bind(servletUtils).to(ServletUtils.class);
+                    bind(resourceImportManager).to(ResourceImportManager.class);
+                    bind(modelBusinessLogic).to(ModelBusinessLogic.class);
+                }
+            })
+            .property("contextConfig", context);
+    }
+
+    @Test
+    void createModelSuccessTest() {
+        when(responseFormat.getStatus()).thenReturn(HttpStatus.OK_200);
+        when(componentsUtils.getResponseFormat(ActionStatus.CREATED)).thenReturn(responseFormat);
+        when(modelBusinessLogic.createModel(any(Model.class))).thenReturn(model);
+        response = modelServlet.createModel(modelCreateRequest, USER_ID);
+        assertThat(response.getStatus()).isEqualTo(HttpStatus.OK_200);
+    }
+
+    @Test
+    void createModelFailTest() {
+        when(responseFormat.getStatus()).thenReturn(HttpStatus.INTERNAL_SERVER_ERROR_500);
+        when(componentsUtils.getResponseFormat(ActionStatus.GENERAL_ERROR)).thenReturn(responseFormat);
+        when(modelBusinessLogic.createModel(any(Model.class))).thenReturn(model);
+        response = modelServlet.createModel(modelCreateRequest, USER_ID);
+        assertThat(response.getStatus()).isEqualTo(HttpStatus.INTERNAL_SERVER_ERROR_500);
+    }
+
+    @Test
+    void createModelFailWithModelNameEmptyTest() {
+        when(responseFormat.getStatus()).thenReturn(HttpStatus.INTERNAL_SERVER_ERROR_500);
+        when(componentsUtils.getResponseFormat(ActionStatus.GENERAL_ERROR)).thenReturn(responseFormat);
+        modelCreateRequest.setName(StringUtils.EMPTY);
+        final Exception exception = assertThrows(ConstraintViolationException.class, () -> modelServlet.createModel(modelCreateRequest, USER_ID));
+        assertThat(exception.getMessage()).isEqualTo("Model name cannot be empty");
+    }
+
+    @Test
+    void createModelFailWithModelNameNullTest() {
+        when(responseFormat.getStatus()).thenReturn(HttpStatus.INTERNAL_SERVER_ERROR_500);
+        when(componentsUtils.getResponseFormat(ActionStatus.GENERAL_ERROR)).thenReturn(responseFormat);
+        modelCreateRequest.setName(null);
+        final Exception exception = assertThrows(ConstraintViolationException.class, () -> modelServlet.createModel(modelCreateRequest, USER_ID));
+        assertThat(exception.getMessage()).isEqualTo("Model name cannot be null");
+    }
+
+    @Test
+    void createModelThrowsBusinessExceptionTest() {
+        when(modelBusinessLogic.createModel(model)).thenThrow(new BusinessException() {});
+        assertThrows(BusinessException.class, () -> modelServlet.createModel(modelCreateRequest, USER_ID));
+    }
+
+}
\ No newline at end of file