HHH-18399 Add test for issue

Author: mbellade

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/onetoone/OneToOneJoinTableSelfReferenceTest.java

@@ -0,0 +1,93 @@
+/*
+ * 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.mapping.onetoone;
+
+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.Test;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.JoinTable;
+import jakarta.persistence.OneToOne;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Marco Belladelli
+ */
+@DomainModel( annotatedClasses = OneToOneJoinTableSelfReferenceTest.Person.class )
+@SessionFactory
+@Jira( "https://hibernate.atlassian.net/browse/HHH-18399" )
+public class OneToOneJoinTableSelfReferenceTest {
+@Test
+public void testMapping(SessionFactoryScope scope) {
+scope.inTransaction( session -> {
+final Person parent = new Person();
+parent.setId( 2L );
+
+final Person child = new Person();
+child.setId( 1L );
+parent.setChild( child );
+
+session.persist( child );
+session.persist( parent );
+} );
+scope.inTransaction( session -> {
+final Person parent = session.find( Person.class, 2L );
+assertThat( parent.getChild() ).isNotNull().extracting( Person::getId ).isEqualTo( 1L );
+} );
+}
+
+@AfterAll
+public void tearDown(SessionFactoryScope scope) {
+scope.getSessionFactory().getSchemaManager().truncateMappedObjects();
+}
+
+@Entity( name = "Person" )
+static class Person {
+@Id
+private Long id;
+
+@OneToOne( fetch = FetchType.LAZY )
+@JoinTable(
+name = "Parent_Child",
+joinColumns = @JoinColumn( name = "parent_id", referencedColumnName = "id" ),
+inverseJoinColumns = @JoinColumn( name = "child_id", referencedColumnName = "id" )
+)
+private Person child;
+
+@OneToOne( mappedBy = "child", fetch = FetchType.LAZY )
+private Person parent;
+
+public Long getId() {
+return id;
+}
+
+public void setId(Long id) {
+this.id = id;
+}
+
+public Person getChild() {
+return child;
+}
+
+public void setChild(Person child) {
+this.child = child;
+}
+
+public Person getParent() {
+return parent;
+}
+}
+}