HHH-16112 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/jpa/orphan/onetomany/OneToManyOrphanRemovalBatchTest.java

@@ -0,0 +1,117 @@
+/*
+ * 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.onetomany;
+
+import java.util.List;
+
+import org.hibernate.cfg.AvailableSettings;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.JiraKey;
+import org.hibernate.testing.orm.junit.ServiceRegistry;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.hibernate.testing.orm.junit.Setting;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToMany;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+/**
+ * @author Marco Belladelli
+ */
+@SessionFactory
+@DomainModel(annotatedClasses = {
+		OneToManyOrphanRemovalBatchTest.EntityA.class,
+		OneToManyOrphanRemovalBatchTest.EntityB.class
+})
+@ServiceRegistry(settings = @Setting(name = AvailableSettings.STATEMENT_BATCH_SIZE, value = "5"))
+@JiraKey("HHH-16112")
+public class OneToManyOrphanRemovalBatchTest {
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			EntityB entityB1 = new EntityB( "entity_b_1" );
+			EntityB entityB2 = new EntityB( "entity_b_2" );
+			session.persist( entityB1 );
+			session.persist( entityB2 );
+			EntityA entityA = new EntityA( "entity_a", List.of( entityB1, entityB2 ) );
+			session.persist( entityA );
+		} );
+	}
+
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			session.createMutationQuery( "delete from EntityB" ).executeUpdate();
+			session.createMutationQuery( "delete from EntityA" ).executeUpdate();
+		} );
+	}
+
+	@Test
+	public void testClearChildren(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			EntityA entityA = session.find( EntityA.class, 1L );
+			entityA.getChildren().clear();
+		} );
+		scope.inTransaction( session -> {
+			EntityA entityA = session.find( EntityA.class, 1L );
+			assertEquals( 0, entityA.getChildren().size() );
+			assertEquals( 0, session.createQuery( "from EntityB", EntityB.class ).getResultList().size() );
+		} );
+	}
+
+	@Entity(name = "EntityA")
+	public static class EntityA {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String name;
+
+		@OneToMany(orphanRemoval = true)
+		// JoinColumn is needed to trigger the update on the entity table
+		// which by default has an update Expectation of 1 row
+		@JoinColumn(name = "entitya_id")
+		private List<EntityB> children;
+
+		public EntityA() {
+		}
+
+		public EntityA(String name, List<EntityB> children) {
+			this.name = name;
+			this.children = children;
+		}
+
+		public List<EntityB> getChildren() {
+			return children;
+		}
+	}
+
+	@Entity(name = "EntityB")
+	public static class EntityB {
+		@Id
+		@GeneratedValue
+		private Long id;
+
+		private String name;
+
+		public EntityB() {
+		}
+
+		public EntityB(String name) {
+			this.name = name;
+		}
+	}
+}