DATAREST-130 - Added test case for DomainObjectMerger.

spring-data-rest-core/src/test/java/org/springframework/data/rest/core/support/DomainObjectMergerTests.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2013 the original author or authors.
+ *
+ * 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.springframework.data.rest.core.support;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.support.GenericApplicationContext;
+import org.springframework.core.convert.ConversionService;
+import org.springframework.core.convert.support.DefaultConversionService;
+import org.springframework.data.repository.support.Repositories;
+import org.springframework.data.rest.core.domain.jpa.JpaRepositoryConfig;
+import org.springframework.data.rest.core.domain.jpa.Person;
+import org.springframework.data.rest.core.domain.jpa.PersonRepository;
+import org.springframework.hateoas.Resource;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = JpaRepositoryConfig.class)
+public class DomainObjectMergerTests {
+
+	@Autowired
+	PersonRepository personRepository;
+
+	@Autowired
+	GenericApplicationContext context;
+
+	@Test
+	public void mergeNewValue() {
+		Repositories repositories = new Repositories(context.getBeanFactory());
+		ConversionService conversionService = new DefaultConversionService();
+
+		Resource<Person> incoming = new Resource<Person>(new Person("Bilbo", "Baggins"));
+		Person existingDomainObject = new Person("Frodo", "Baggins");
+
+		DomainObjectMerger merger = new DomainObjectMerger(repositories,
+				conversionService);
+		merger.merge(incoming.getContent(), existingDomainObject);
+
+		assertThat(existingDomainObject.getFirstName(),
+				equalTo(incoming.getContent().getFirstName()));
+		assertThat(existingDomainObject.getLastName(),
+				equalTo(incoming.getContent().getLastName()));
+	}
+
+	/**
+	 * @see DATAREST-130
+	 */
+	@Test
+	public void mergeNullValue() {
+		Repositories repositories = new Repositories(context.getBeanFactory());
+		ConversionService conversionService = new DefaultConversionService();
+
+		Resource<Person> incoming = new Resource<Person>(new Person(null, null));
+		Person existingDomainObject = new Person("Frodo", "Baggins");
+
+		DomainObjectMerger merger = new DomainObjectMerger(repositories,
+				conversionService);
+		merger.merge(incoming.getContent(), existingDomainObject);
+
+		assertThat(existingDomainObject.getFirstName(),
+				equalTo(incoming.getContent().getFirstName()));
+		assertThat(existingDomainObject.getLastName(),
+				equalTo(incoming.getContent().getLastName()));
+	}
+
+}