HHH-16477 LAZY @ManyToOne may again break EAGER @ManyToOne with Bytecode Enhancement

hibernate-core/src/test/java/org/hibernate/orm/test/bytecode/enhancement/association/OneToManyLazyAndEagerTest2.java

@@ -0,0 +1,165 @@
+/*
+ * 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.bytecode.enhancement.association;
+
+import jakarta.persistence.*;
+import org.hibernate.Hibernate;
+import org.hibernate.orm.test.jpa.BaseEntityManagerFunctionalTestCase;
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.bytecode.enhancement.BytecodeEnhancerRunner;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author Marco Belladelli
+ * @author Tomas Cerskus
+ */
+@RunWith(BytecodeEnhancerRunner.class)
+@TestForIssue(jiraKey = "HHH-16477")
+public class OneToManyLazyAndEagerTest2 extends BaseEntityManagerFunctionalTestCase {
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class<?>[] {
+				User.class,
+				Coupon.class,
+				Order.class
+		};
+	}
+
+	@Before
+	public void prepare() {
+		doInJPA( this::entityManagerFactory, em -> {
+			final User user = new User( "User 1", "Marco" );
+			final User targetUser = new User( "User 2", "Andrea" );
+			final Coupon coupon = new Coupon("Coupon 1", targetUser);
+			final Order order = new Order( "Order 1", user, targetUser, coupon);
+			em.persist( user );
+			em.persist( targetUser );
+			em.persist( coupon );
+			em.persist( order );
+		} );
+	}
+
+	@After
+	public void tearDown() {
+		doInJPA( this::entityManagerFactory, em -> {
+			em.createQuery( "delete from Order" ).executeUpdate();
+			em.createQuery( "delete from Coupon" ).executeUpdate();
+			em.createQuery( "delete from User" ).executeUpdate();
+		} );
+	}
+
+	@Test
+	public void testQuery() {
+		doInJPA( this::entityManagerFactory, em -> {
+			final Order order = em.createQuery( "select o from Order o", Order.class )
+					.getResultList()
+					.get( 0 );
+			final User user = order.getUser();
+			assertTrue( "Proxy should be initialized", Hibernate.isInitialized( user ) );
+			assertEquals( "Marco", user.getName() );
+			final User targetUser = order.getTargetUser();
+			assertTrue( "Proxy should be initialized", Hibernate.isInitialized( targetUser ) );
+			assertEquals( "Andrea", targetUser.getName() );
+		} );
+	}
+
+	@Entity(name = "Order")
+	@Table(name = "Orders")
+	public static class Order {
+		@Id
+		private String id;
+
+		@ManyToOne(fetch = FetchType.EAGER)
+		private User user;
+
+		@ManyToOne(fetch = FetchType.EAGER)
+		private User targetUser;
+
+		@ManyToOne(fetch = FetchType.EAGER)
+		private Coupon coupon;
+
+		public Order() {
+		}
+
+		public Order(String id, User user, User targetUser, Coupon coupon) {
+			this.id = id;
+			this.user = user;
+			this.targetUser = targetUser;
+			this.coupon = coupon;
+		}
+
+		public String getId() {
+			return id;
+		}
+
+		public User getUser() {
+			return user;
+		}
+
+		public User getTargetUser() {
+			return targetUser;
+		}
+	}
+
+	@Entity(name = "User")
+	@Table(name = "Users")
+	public static class User {
+		@Id
+		private String id;
+
+		private String name;
+
+		public User() {
+		}
+
+		public User(String id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+
+		public String getId() {
+			return id;
+		}
+
+		public String getName() {
+			return name;
+		}
+	}
+
+	@Entity(name = "Coupon")
+	@Table(name = "Coupons")
+	public static class Coupon {
+		@Id
+		private String id;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		private User targetUser;
+
+		public Coupon() {
+		}
+
+		public Coupon(String id, User targetUser) {
+			this.id = id;
+			this.targetUser = targetUser;
+		}
+
+		public String getId() {
+			return id;
+		}
+
+		public User getTargetUser() {
+			return targetUser;
+		}
+	}
+}