From 6d47ef5ee939fa0285038707ce881cb6c846942e Mon Sep 17 00:00:00 2001
From: Marco Belladelli <marco@hibernate.org>
Date: Wed, 2 Aug 2023 10:35:44 +0200
Subject: [PATCH] HHH-16879 Add test for issue

---
 .../mapping/embeddable/ParentCacheTest.java   | 121 ++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 hibernate-core/src/test/java/org/hibernate/orm/test/mapping/embeddable/ParentCacheTest.java

diff --git a/hibernate-core/src/test/java/org/hibernate/orm/test/mapping/embeddable/ParentCacheTest.java b/hibernate-core/src/test/java/org/hibernate/orm/test/mapping/embeddable/ParentCacheTest.java
new file mode 100644
index 0000000000..a5660322c2
--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/orm/test/mapping/embeddable/ParentCacheTest.java
@@ -0,0 +1,121 @@
+/*
+ * 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.embeddable;
+
+import org.hibernate.annotations.Parent;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.stat.spi.StatisticsImplementor;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.Jira;
+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.Cacheable;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Marco Belladelli
+ */
+@DomainModel( annotatedClasses = { ParentCacheTest.ChildEmbeddable.class, ParentCacheTest.ParentEntity.class } )
+@SessionFactory( generateStatistics = true )
+@ServiceRegistry( settings = @Setting( name = AvailableSettings.USE_SECOND_LEVEL_CACHE, value = "true" ) )
+@Jira( "https://hibernate.atlassian.net/browse/HHH-16879" )
+public class ParentCacheTest {
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			session.persist( new ParentEntity( new ChildEmbeddable( "test" ) ) );
+		} );
+	}
+
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction( session -> session.createMutationQuery( "delete from ParentEntity" ).executeUpdate() );
+	}
+
+	@Test
+	public void test(SessionFactoryScope scope) {
+		scope.getSessionFactory().getCache().evictEntityData();
+		final StatisticsImplementor statistics = scope.getSessionFactory().getStatistics();
+		statistics.clear();
+
+		scope.inTransaction( session -> {
+			final ParentEntity parent = session.find( ParentEntity.class, 1L );
+			final ChildEmbeddable embeddable = parent.getChild();
+			assertThat( embeddable.getParent() ).isNotNull();
+		} );
+
+		assertThat( statistics.getSecondLevelCacheHitCount() ).isEqualTo( 0 );
+		assertThat( statistics.getSecondLevelCacheMissCount() ).isEqualTo( 1L );
+		assertThat( statistics.getSecondLevelCachePutCount() ).isEqualTo( 1L );
+
+		scope.inTransaction( session -> {
+			final ParentEntity parent = session.find( ParentEntity.class, 1L );
+			final ChildEmbeddable embeddable = parent.getChild();
+			assertThat( embeddable.getParent() ).isNotNull();
+		} );
+
+		assertThat( statistics.getSecondLevelCacheHitCount() ).isEqualTo( 1L );
+	}
+
+	@Embeddable
+	public static class ChildEmbeddable {
+		@Parent
+		public ParentEntity parent;
+
+		public String field;
+
+		public ChildEmbeddable() {
+		}
+
+		public ChildEmbeddable(String field) {
+			this.field = field;
+		}
+
+		public ParentEntity getParent() {
+			return parent;
+		}
+
+		public void setParent(ParentEntity parent) {
+			this.parent = parent;
+		}
+	}
+
+	@Entity( name = "ParentEntity" )
+	@Cacheable
+	public static class ParentEntity {
+		@Id
+		@GeneratedValue
+		public Long id;
+
+		@Embedded
+		public ChildEmbeddable child;
+
+		public ParentEntity() {
+		}
+
+		public ParentEntity(ChildEmbeddable child) {
+			this.child = child;
+		}
+
+		public ChildEmbeddable getChild() {
+			return child;
+		}
+	}
+}