HHH-15063 Add test for orphan removal of OneToOne inside Embeddable

hibernate-core/src/test/java/org/hibernate/orm/test/jpa/orphan/embedded/onetoone/EmbeddedEntityWithOneToOneLazyOrphanRemovalTest.java

@@ -0,0 +1,191 @@
+/*
+ * 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.orphan.embedded.onetoone;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToOne;
+
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+/**
+ * Similar test as ../../embedded/onetoone/OneToOneLazyOrphanRemovalTest,
+ * shows that orphanRemoval = true is not removing the orphan of OneToOne relations in Embedded objects
+ * for unidirectional relationship.
+ *
+ * @TestForIssue( jiraKey = "HHH-9663" )
+ */
+@Jpa(
+		annotatedClasses = {
+				EmbeddedEntityWithOneToOneLazyOrphanRemovalTest.RaceDriver.class,
+				EmbeddedEntityWithOneToOneLazyOrphanRemovalTest.Car.class,
+				EmbeddedEntityWithOneToOneLazyOrphanRemovalTest.Engine.class
+		}
+)
+public class EmbeddedEntityWithOneToOneLazyOrphanRemovalTest {
+
+	@Test
+	public void testOneToOneLazyOrphanRemoval(EntityManagerFactoryScope scope) {
+		// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+		// Initialize the data
+		scope.inTransaction( entityManager -> {
+			final Engine engine = new Engine( 1, 275 );
+			final Car car = new Car( 1, engine, "red" );
+			final RaceDriver raceDriver = new RaceDriver( 1, car );
+			entityManager.persist( engine );
+			entityManager.persist( raceDriver );
+		} );
+
+		// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+		//set car to null, orphanRemoval = true should trigger deletion for engine entity
+		scope.inTransaction( entityManager -> {
+			final RaceDriver raceDriver = entityManager.find( RaceDriver.class, 1 );
+
+			//check, that at the moment the car is orphan
+			assertNotNull( raceDriver.getCar() );
+
+			raceDriver.setCar( null );
+			entityManager.merge( raceDriver );
+
+			final RaceDriver raceDriver2 = entityManager.find( RaceDriver.class, 1 );
+			assertNull( raceDriver2.car );
+		} );
+
+		//check, that the engine is deleted:
+		scope.inTransaction( entityManager -> {
+			final RaceDriver raceDriver = entityManager.find( RaceDriver.class, 1 );
+			assertNull( raceDriver.getCar() );
+
+			final Engine engine = entityManager.find( Engine.class, 1 );
+			assertNull( engine );
+		} );
+	}
+
+	@Entity(name = "RaceDriver")
+	public static class RaceDriver {
+
+		@Id
+		private Integer id;
+
+		@Embedded
+		private Car car;
+
+		RaceDriver() {
+			// Required by JPA
+		}
+
+		RaceDriver(Integer id, Car car) {
+			this.id = id;
+			this.car = car;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public void setId(Integer id) {
+			this.id = id;
+		}
+
+		public Car getCar() {
+			return car;
+		}
+
+		public void setCar(Car car) {
+			this.car = car;
+		}
+	}
+
+	@Embeddable
+	public static class Car {
+
+		@Id
+		private Integer id;
+
+		// represents a unidirectional one-to-one
+		@OneToOne(orphanRemoval = true, fetch = FetchType.LAZY)
+		private Engine engine;
+
+		@Column
+		private String color;
+
+		Car() {
+			// Required by JPA
+		}
+
+		Car(Integer id, Engine engine, String color) {
+			this.id = id;
+			this.engine = engine;
+			this.color = color;
+		}
+
+		public Engine getEngine() {
+			return engine;
+		}
+
+		public void setEngine(Engine engine) {
+			this.engine = engine;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public void setId(Integer id) {
+			this.id = id;
+		}
+
+		public String getColor() {
+			return color;
+		}
+
+		public void setColor(String color) {
+			this.color = color;
+		}
+	}
+
+	@Entity(name = "Engine")
+	public static class Engine {
+		@Id
+		private Integer id;
+		private Integer horsePower;
+
+		Engine() {
+			// Required by JPA
+		}
+
+		Engine(Integer id, int horsePower) {
+			this.id = id;
+			this.horsePower = horsePower;
+		}
+
+		public Integer getId() {
+			return id;
+		}
+
+		public void setId(Integer id) {
+			this.id = id;
+		}
+
+		public Integer getHorsePower() {
+			return horsePower;
+		}
+
+		public void setHorsePower(Integer horsePower) {
+			this.horsePower = horsePower;
+		}
+	}
+}