example.springdata.jpa.basics.BasicSample.java Source code

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/*
 * Copyright 2013-2014 the original author or authors.
 *
 * Licenseimport static org.junit.Assert.*;
    
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
    
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.data.jpa.example.domain.User;
import org.springframework.data.jpa.repository.support.SimpleJpaRepository;
import org.springframework.data.repository.CrudRepository;
ess or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package example.springdata.jpa.basics;

import static org.junit.Assert.*;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.data.jpa.repository.support.SimpleJpaRepository;
import org.springframework.data.repository.CrudRepository;

import example.springdata.jpa.simple.User;

/**
 * This unit tests shows plain usage of {@link SimpleJpaRepository}.
 * 
 * @author Oliver Gierke
 * @author Thomas Darimont
 */
public class BasicSample {

    private CrudRepository<User, Long> userRepository;
    private EntityManager em;

    /**
     * Sets up a {@link SimpleJpaRepository} instance.
     */
    @Before
    public void setUp() {

        EntityManagerFactory factory = Persistence.createEntityManagerFactory("jpa.sample.plain");
        em = factory.createEntityManager();

        userRepository = new SimpleJpaRepository<User, Long>(User.class, em);

        em.getTransaction().begin();
    }

    @After
    public void tearDown() {
        em.getTransaction().rollback();
    }

    /**
     * Tests saving users. Don't mimic transactionality shown here. It seriously lacks resource cleanup in case of an
     * exception. Simplification serves descriptivness.
     */
    @Test
    public void savingUsers() {

        User user = new User();
        user.setUsername("username");

        user = userRepository.save(user);

        assertEquals(user, userRepository.findOne(user.getId()));
    }
}