/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.jpa.test.query;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.EntityManager;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Query;
import javax.persistence.criteria.CriteriaQuery;
import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
import org.hibernate.testing.DialectChecks;
import org.hibernate.testing.RequiresDialectFeature;
import org.hibernate.testing.TestForIssue;
import org.hibernate.testing.transaction.TransactionUtil;
import org.junit.Before;
import org.junit.Test;
import static junit.framework.TestCase.assertTrue;
/**
* @author Andrea Boriero
*/
@RequiresDialectFeature(
value = DialectChecks.SupportLimitCheck.class,
comment = "Dialect does not support limit"
)
public class LimitExpressionTest extends BaseEntityManagerFunctionalTestCase {
@Override
protected Class<?>[] getAnnotatedClasses() {
return new Class[]{Person.class};
}
@Test
@TestForIssue(jiraKey = "HHH-11278")
public void testAnEmptyListIsReturnedWhenSetMaxResultsToZero() {
TransactionUtil.doInJPA( this::entityManagerFactory, (EntityManager entityManager) -> {
final Query query = entityManager.createQuery( "from Person p" );
final List list = query.setMaxResults( 0 ).getResultList();
assertTrue( "The list should be empty with setMaxResults 0", list.isEmpty() );
} );
}
@Before
public void prepareTest() throws Exception {
TransactionUtil.doInJPA( this::entityManagerFactory, entityManager -> {
Person p = new Person();
entityManager.persist( p );
} );
}
@Entity(name = "Person")
public static class Person {
@Id
@GeneratedValue
private Long id;
}
}