HHH-16960 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/entitygraph/FindWithEntityGraphTest.java

@@ -0,0 +1,186 @@
+package org.hibernate.orm.test.entitygraph;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EntityGraph;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.MapsId;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.OneToOne;
+
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+@Jpa(
+		annotatedClasses = {
+				FindWithEntityGraphTest.Person.class,
+				FindWithEntityGraphTest.PersonContact.class
+		}
+)
+@JiraKey("HHH-16960")
+public class FindWithEntityGraphTest {
+
+
+	@BeforeAll
+	public void setUp(EntityManagerFactoryScope scope) {
+		scope.inTransaction(
+				entityManager -> {
+					Person person = new Person( 1L, "test" );
+
+					Person child1 = new Person( 2L, "child1" );
+					Person child2 = new Person( 2L, "child2" );
+					child1.addParent( person );
+					child2.addParent( person );
+					entityManager.persist( person );
+				}
+		);
+	}
+
+	@Test
+	public void testFind(EntityManagerFactoryScope scope) {
+		scope.inTransaction(
+				entityManager -> {
+					EntityGraph<?> personGraph = entityManager.createEntityGraph( Person.class );
+					personGraph.addAttributeNodes( "children" );
+
+					Person loadedPerson = entityManager.find(
+							Person.class,
+							1l,
+							Map.of( "javax.persistence.fetchgraph", personGraph )
+					);
+
+					PersonContact personContact = loadedPerson.getPersonContact();
+					assertNull( personContact );
+				}
+		);
+	}
+
+	@Entity(name = "Person")
+	public static class Person {
+
+		@Id
+		private Long id;
+
+		private String name;
+
+		@ManyToOne
+		private Person parent;
+
+		@OneToOne(mappedBy = "person", orphanRemoval = true, cascade = CascadeType.ALL)
+		private PersonContact personContact;
+
+		@OneToMany(mappedBy = "parent")
+		private Set<Person> children = new HashSet<>( 0 );
+
+		public Person() {
+		}
+
+		public Person(Long id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+
+		public PersonContact getPersonContact() {
+			return personContact;
+		}
+
+		public void setPersonContact(PersonContact personContact) {
+			this.personContact = personContact;
+		}
+
+		public Person getParent() {
+			return parent;
+		}
+
+		public void setParent(Person parent) {
+			this.parent = parent;
+		}
+
+		public void addParent(Person parent) {
+			this.parent = parent;
+			parent.getChildren().add( this );
+		}
+
+		public Set<Person> getChildren() {
+			return children;
+		}
+
+		public void setChildren(Set<Person> children) {
+			this.children = children;
+		}
+	}
+
+	@Entity(name = "PersonContact")
+	public static class PersonContact {
+		@Id
+		private Long id;
+
+		@Column
+		private String address;
+
+		public PersonContact() {
+		}
+
+		public PersonContact(String address) {
+			this.address = address;
+		}
+
+		@OneToOne(optional = false, fetch = FetchType.LAZY)
+		@MapsId
+		private Person person;
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getAddress() {
+			return address;
+		}
+
+		public void setAddress(String address) {
+			this.address = address;
+		}
+
+		public Person getPerson() {
+			return person;
+		}
+
+		public void setPerson(Person person) {
+			this.person = person;
+		}
+	}
+
+
+}