HHH-16350 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/loading/PreLoadEventTest.java

@@ -0,0 +1,62 @@
+/*
+ * 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.loading;
+
+import org.hibernate.event.spi.EventType;
+import org.hibernate.event.spi.PreLoadEvent;
+import org.hibernate.event.spi.PreLoadEventListener;
+
+import org.hibernate.testing.orm.domain.gambit.BasicEntity;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.Jira;
+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 static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Marco Belladelli
+ */
+@SessionFactory
+@DomainModel( annotatedClasses = BasicEntity.class )
+@Jira( "https://hibernate.atlassian.net/browse/HHH-16350" )
+public class PreLoadEventTest {
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction( session -> session.persist( new BasicEntity( 1, "test" ) ) );
+		scope.getSessionFactory().getEventEngine().getListenerRegistry().appendListeners(
+				EventType.PRE_LOAD,
+				new AssertingPreLoadEventListener()
+		);
+	}
+
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction( session -> session.createMutationQuery( "delete from BasicEntity" ).executeUpdate() );
+	}
+
+	@Test
+	public void testPreLoad(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final BasicEntity be = session.createQuery( "from BasicEntity", BasicEntity.class ).getSingleResult();
+			assertThat( be.getData() ).isEqualTo( "test" );
+		} );
+	}
+
+	public static class AssertingPreLoadEventListener implements PreLoadEventListener {
+		@Override
+		public void onPreLoad(PreLoadEvent event) {
+			event.getPersister().getValues( event.getEntity() );
+			assertThat( event.getState() ).isNotNull();
+			assertThat( event.getState() ).hasSize( 1 );
+			assertThat( event.getState()[0] ).isEqualTo( "test" );
+		}
+	}
+}