HHH-9731 - Add test for issue

hibernate-entitymanager/src/test/java/org/hibernate/jpa/test/criteria/selectcase/SelectCaseTest.java

@@ -0,0 +1,133 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) {DATE}, Red Hat Inc. or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors.  All third-party contributions are
+ * distributed under license by Red Hat Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA  02110-1301  USA
+ */
+package org.hibernate.jpa.test.criteria.selectcase;
+
+import javax.persistence.EntityManager;
+import javax.persistence.EnumType;
+import javax.persistence.Enumerated;
+import javax.persistence.Id;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.Predicate;
+import javax.persistence.criteria.Root;
+import java.util.List;
+
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+
+import org.junit.Test;
+
+import org.hibernate.testing.TestForIssue;
+
+@TestForIssue( jiraKey = "HHH-9731" )
+public class SelectCaseTest extends BaseEntityManagerFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {Entity.class};
+	}
+
+	@Test
+	public void selectCaseWithValuesShouldWork() {
+		EntityManager entityManager = getOrCreateEntityManager();
+		CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+
+		CriteriaBuilder.Case<EnumValue> selectCase = cb.selectCase();
+		Predicate somePredicate = cb.equal( cb.literal( 1 ), 1 );
+		selectCase.when( somePredicate, EnumValue.VALUE_1 );
+		selectCase.otherwise( EnumValue.VALUE_2 );
+
+		CriteriaQuery<Entity> query = cb.createQuery( Entity.class );
+		Root<Entity> from = query.from( Entity.class );
+		query.select( from ).where( cb.equal( from.get( "value" ), selectCase ) );
+
+		entityManager.createQuery( query ).getResultList();
+	}
+
+	@Test
+	public void selectCaseWithCastedTypeValuesShouldWork() {
+		EntityManager entityManager = getOrCreateEntityManager();
+
+		CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+
+		CriteriaBuilder.Case<String> selectCase = cb.selectCase();
+		Predicate somePredicate = cb.equal( cb.literal( 1 ), 1 );
+		selectCase.when( somePredicate, EnumValue.VALUE_1.name() );
+		selectCase.otherwise( EnumValue.VALUE_2.name() );
+
+		CriteriaQuery<Entity> query = cb.createQuery( Entity.class );
+		Root<Entity> from = query.from( Entity.class );
+		query.select( from ).where( cb.equal( from.get( "value" ), selectCase.as( String.class ) ) );
+
+		entityManager.createQuery( query ).getResultList();
+	}
+
+	@Test
+	public void simpleSelectCaseWithValuesShouldWork() {
+		EntityManager entityManager = getOrCreateEntityManager();
+
+		CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+
+		CriteriaBuilder.SimpleCase<Integer, EnumValue> selectCase = cb.selectCase( cb.literal( 1 ) );
+		selectCase.when( 1, EnumValue.VALUE_1 );
+		selectCase.otherwise( EnumValue.VALUE_2 );
+
+		CriteriaQuery<Entity> query = cb.createQuery( Entity.class );
+		Root<Entity> from = query.from( Entity.class );
+		query.select( from ).where( cb.equal( from.get( "value" ), selectCase ) );
+
+		List<?> result = entityManager.createQuery( query ).getResultList();
+	}
+
+	@Test
+	public void simpleSelectCaseWithCastedTypeValuesShouldWork() {
+		EntityManager entityManager = getOrCreateEntityManager();
+
+		CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+
+		CriteriaBuilder.SimpleCase<Integer, String> selectCase = cb.selectCase( cb.literal( 1 ) );
+		selectCase.when( 1, EnumValue.VALUE_1.name() );
+		selectCase.otherwise( EnumValue.VALUE_2.name() );
+
+		CriteriaQuery<Entity> query = cb.createQuery( Entity.class );
+		Root<Entity> from = query.from( Entity.class );
+		query.select( from ).where( cb.equal( from.get( "value" ), selectCase.as( String.class ) ) );
+
+		entityManager.createQuery( query ).getResultList();
+	}
+
+	@javax.persistence.Entity
+	public static class Entity {
+
+		@Id
+		private Long id;
+
+		@Enumerated(EnumType.STRING)
+		private EnumValue value;
+	}
+
+	public enum EnumValue {
+		VALUE_1,
+		VALUE_2;
+	}
+}