HHH-10341 - Add test for issue

(cherry picked from commit 57b954d)

hibernate-core/src/test/java/org/hibernate/jpa/test/query/TupleQueryTest.java

@@ -0,0 +1,111 @@
+/*
+ * 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 javax.persistence.Entity;
+import javax.persistence.EntityManager;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.Table;
+import javax.persistence.Tuple;
+import javax.persistence.TupleElement;
+import javax.persistence.TypedQuery;
+import java.util.List;
+
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.nullValue;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.core.Is.is;
+
+/**
+ * @author Andrea Boriero
+ */
+public class TupleQueryTest extends BaseEntityManagerFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {User.class};
+	}
+
+	@Test
+	public void testGetAliasReturnNullIfNoAliasExist() {
+		EntityManager em = getOrCreateEntityManager();
+		try {
+			em.getTransaction().begin();
+			User u = new User( "Fab" );
+			em.persist( u );
+			em.getTransaction().commit();
+
+			TypedQuery<Tuple> query = em.createQuery( "SELECT u.firstName from User u", Tuple.class );
+
+			List<Tuple> result = query.getResultList();
+			List<TupleElement<?>> elements = result.get( 0 ).getElements();
+
+			assertThat( elements.size(), is( 1 ) );
+			final String alias = elements.get( 0 ).getAlias();
+			assertThat( alias, is( nullValue() ) );
+		}
+		catch (Exception e) {
+			if ( em.getTransaction().isActive() ) {
+				em.getTransaction().rollback();
+			}
+			throw e;
+		}
+		finally {
+			em.close();
+		}
+	}
+
+	@Test
+	public void testGetAlias() {
+		EntityManager em = getOrCreateEntityManager();
+		try {
+			em.getTransaction().begin();
+			User u = new User( "Fab" );
+			em.persist( u );
+			em.getTransaction().commit();
+
+			TypedQuery<Tuple> query = em.createQuery( "SELECT u.firstName as fn from User u", Tuple.class );
+
+			List<Tuple> result = query.getResultList();
+			List<TupleElement<?>> elements = result.get( 0 ).getElements();
+
+			assertThat( elements.size(), is( 1 ) );
+			final String alias = elements.get( 0 ).getAlias();
+			assertThat( alias, is( "fn" ) );
+		}
+		catch (Exception e) {
+			if ( em.getTransaction().isActive() ) {
+				em.getTransaction().rollback();
+			}
+			throw e;
+		}
+		finally {
+			em.close();
+		}
+	}
+
+	@Entity(name = "User")
+	@Table(name = "USERS")
+	public static class User {
+		@Id
+		@GeneratedValue
+		long id;
+
+		String firstName;
+
+		public User() {
+		}
+
+		public User(String firstName) {
+			this.firstName = firstName;
+		}
+	}
+}