HHH-16191 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/query/sql/NativeQueryEagerAssociationTest.java

@@ -0,0 +1,137 @@
+/*
+ * 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.orm.test.query.sql;
+
+import java.util.List;
+
+import org.hibernate.Hibernate;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * @author Marco Belladelli
+ */
+@SessionFactory
+@DomainModel(annotatedClasses = {
+		NativeQueryEagerAssociationTest.Building.class,
+		NativeQueryEagerAssociationTest.Classroom.class
+})
+@JiraKey("HHH-16191")
+public class NativeQueryEagerAssociationTest {
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final Building building1 = new Building( 1L, "building_1" );
+			final Building building2 = new Building( 2L, "building_2" );
+			final Building building3 = new Building( 3L, "building_3" );
+			session.persist( building1 );
+			session.persist( building2 );
+			session.persist( building3 );
+			session.persist( new Classroom( 1L, "classroom_1", building1, List.of( building2, building3 ) ) );
+		} );
+	}
+
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			session.createMutationQuery( "delete from Classroom" ).executeUpdate();
+			session.createMutationQuery( "delete from Building" ).executeUpdate();
+		} );
+	}
+
+	@Test
+	public void testNativeQuery(SessionFactoryScope scope) {
+		final Classroom result = scope.fromTransaction(
+				session -> session.createNativeQuery( "select id, description, building_id from classroom", Classroom.class ).getSingleResult()
+		);
+		assertEquals( 1L, result.getId() );
+		assertTrue( Hibernate.isInitialized( result.getBuilding() ) );
+		assertTrue( Hibernate.isInitialized( result.getAdjacentBuildings() ) );
+		assertEquals( 1L, result.getBuilding().getId() );
+		assertEquals( 2, result.getAdjacentBuildings().size() );
+	}
+
+	@Entity(name = "Building")
+	public static class Building {
+		@Id
+		private Long id;
+
+		private String description;
+
+		public Building() {
+		}
+
+		public Building(Long id, String description) {
+			this.id = id;
+			this.description = description;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public String getDescription() {
+			return description;
+		}
+	}
+
+	@Entity(name = "Classroom")
+	public static class Classroom {
+		@Id
+		private Long id;
+
+		private String description;
+
+		@ManyToOne(fetch = FetchType.EAGER)
+		private Building building;
+
+		@OneToMany(fetch = FetchType.EAGER)
+		private List<Building> adjacentBuildings;
+
+		public Classroom() {
+		}
+
+		public Classroom(Long id, String description, Building building, List<Building> adjacentBuildings) {
+			this.id = id;
+			this.description = description;
+			this.building = building;
+			this.adjacentBuildings = adjacentBuildings;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public String getDescription() {
+			return description;
+		}
+
+		public Building getBuilding() {
+			return building;
+		}
+
+		public List<Building> getAdjacentBuildings() {
+			return adjacentBuildings;
+		}
+	}
+}