EmptyStringTest.java

package org.hibernate.envers.test.integration.basic;

import java.util.Arrays;
import javax.persistence.EntityManager;

import junit.framework.Assert;
import org.junit.Test;

import org.hibernate.dialect.Oracle8iDialect;
import org.hibernate.envers.test.BaseEnversJPAFunctionalTestCase;
import org.hibernate.envers.test.Priority;
import org.hibernate.envers.test.entities.StrTestEntity;
import org.hibernate.testing.RequiresDialect;
import org.hibernate.testing.TestForIssue;

/**
 * @author Lukasz Antoniak (lukasz dot antoniak at gmail dot com)
 */
@TestForIssue(jiraKey = "HHH-7246")
@RequiresDialect(Oracle8iDialect.class)
public class EmptyStringTest extends BaseEnversJPAFunctionalTestCase {
    private Integer emptyId = null;
    private Integer nullId = null;

    @Override
    protected Class<?>[] getAnnotatedClasses() {
        return new Class<?>[]{StrTestEntity.class};
    }

    @Test
    @Priority(10)
    public void initData() {
        EntityManager em = getEntityManager();

        // Revision 1
        em.getTransaction().begin();
        StrTestEntity emptyEntity = new StrTestEntity("");
        em.persist(emptyEntity);
        StrTestEntity nullEntity = new StrTestEntity(null);
        em.persist(nullEntity);
        em.getTransaction().commit();

        emptyId = emptyEntity.getId();
        nullId = nullEntity.getId();

        em.close();
        em = getEntityManager();

        // Should not generate revision after NULL to "" modification and vice versa on Oracle.
        em.getTransaction().begin();
        emptyEntity = em.find(StrTestEntity.class, emptyId);
        emptyEntity.setStr(null);
        em.merge(emptyEntity);
        nullEntity = em.find(StrTestEntity.class, nullId);
        nullEntity.setStr("");
        em.merge(nullEntity);
        em.getTransaction().commit();

        em.close();
    }

    @Test
    public void testRevisionsCounts() {
        Assert.assertEquals(Arrays.asList(1), getAuditReader().getRevisions(StrTestEntity.class, emptyId));
        Assert.assertEquals(Arrays.asList(1), getAuditReader().getRevisions(StrTestEntity.class, nullId));
    }
}