From 27a9ec209ec8a8c938bd31d93235da94f706e997 Mon Sep 17 00:00:00 2001
From: Andrea Boriero <andrea@hibernate.org>
Date: Wed, 3 Apr 2024 18:47:07 +0200
Subject: [PATCH] HHH-17826 Add test for issue

---
 .../ForwardOnlyScrollNoTransactionTest.java   | 108 ++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 hibernate-core/src/test/java/org/hibernate/orm/test/iterate/ForwardOnlyScrollNoTransactionTest.java

diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/iterate/ForwardOnlyScrollNoTransactionTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/iterate/ForwardOnlyScrollNoTransactionTest.java
new file mode 100644
index 0000000000..8ef1f08bbb
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/iterate/ForwardOnlyScrollNoTransactionTest.java
@@ -0,0 +1,108 @@
+package org.hibernate.orm.test.iterate;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.hibernate.ScrollMode;
+import org.hibernate.ScrollableResults;
+import org.hibernate.query.spi.QueryImplementor;
+
+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.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+
+@DomainModel(
+		annotatedClasses = {
+				ForwardOnlyScrollNoTransactionTest.Father.class,
+				ForwardOnlyScrollNoTransactionTest.Son.class
+		}
+)
+@SessionFactory
+@Jira("HHH-17826")
+public class ForwardOnlyScrollNoTransactionTest {
+
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Son son = new Son( "Andrea" );
+					Father father = new Father( "Lionello" );
+					father.addSon( son );
+					session.persist( father );
+
+					Son son1 = new Son( "Alberto" );
+					Father father1 = new Father( "Roberto" );
+					father1.addSon( son1 );
+					session.persist( father1 );
+				}
+		);
+	}
+
+	@Test
+	public void testScroll(SessionFactoryScope scope) {
+		scope.inSession(
+				session -> {
+					QueryImplementor query = session.createQuery( "select f from Father f" );
+
+					try (ScrollableResults result = query.scroll( ScrollMode.FORWARD_ONLY )) {
+						while ( result.next() ) {
+							result.get();
+						}
+					}
+				}
+		);
+	}
+
+	@Entity(name = "Father")
+	public static class Father {
+		@Id
+		@GeneratedValue
+		private Integer id;
+
+		private String name;
+
+		@OneToMany(mappedBy = "father", fetch = FetchType.EAGER)
+		public List<Son> sons = new ArrayList<>();
+
+		public Father() {
+		}
+
+		public Father(String name) {
+			this.name = name;
+		}
+
+		public void addSon(Son son) {
+			sons.add( son );
+			son.father = this;
+		}
+	}
+
+	@Entity(name = "Son")
+	public static class Son {
+		@Id
+		@GeneratedValue
+		private Integer id;
+
+		private String name;
+
+		@ManyToOne
+		private Father father;
+
+		public Son() {
+		}
+
+		public Son(String name) {
+			this.name = name;
+		}
+	}
+}