HHH-17019 Create a reproducer for the issue

hibernate-core/src/test/java/org/hibernate/orm/test/jpa/callbacks/PostLoadLazyListenerTest.java

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+/*
+ * 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.jpa.callbacks;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.hibernate.testing.bytecode.enhancement.BytecodeEnhancerRunner;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityListeners;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.PostLoad;
+
+@JiraKey("HHH-17019")
+@RunWith(BytecodeEnhancerRunner.class)
+public class PostLoadLazyListenerTest extends BaseCoreFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] { Person.class, Tag.class };
+	}
+
+	@After
+	public void tearDown() {
+		inTransaction( session -> {
+					session.createQuery( "delete from Tag" ).executeUpdate();
+					session.createQuery( "delete from Person" ).executeUpdate();
+				}
+		);
+	}
+
+	@Test
+	public void smoke() {
+		inTransaction( session -> {
+					Person person = new Person( 1, "name" );
+					Tag tag = new Tag( 100, person );
+					person.tags.add( tag );
+
+					session.persist( person );
+					session.persist( tag );
+				}
+		);
+
+		inTransaction( session -> {
+					Tag tag = session.find( Tag.class, 100 );
+					assertThat( tag )
+							.isNotNull();
+					assertThat( tag.person.name ).isEqualTo( "name" );
+					assertThat( PersonListener.WAS_CALLED ).isTrue();
+				}
+		);
+	}
+
+	@Entity(name = "Person")
+	@EntityListeners(PersonListener.class)
+	public static class Person {
+		@Id
+		private int id;
+
+		private String name;
+
+		@OneToMany(mappedBy = "person")
+		private Collection<Tag> tags = new ArrayList<>();
+
+		public Person() {
+		}
+
+		public Person(int id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+	}
+
+	@Entity(name = "Tag")
+	public static class Tag {
+
+		@Id
+		private int id;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		private Person person;
+
+		public Tag() {
+		}
+
+		public Tag(int id, Person person) {
+			this.id = id;
+			this.person = person;
+		}
+	}
+
+	public static class PersonListener {
+		static boolean WAS_CALLED = false;
+
+		@PostLoad
+		void onPreUpdate(Object o) {
+			WAS_CALLED = true;
+		}
+	}
+}