HHH-11117 - LazyPropertyInitializer$1 cannot be cast to [B when calling Session.merge() on compile time enhanced composed entities

Add a test case to prove it works after HHH-12054 got fixed

hibernate-core/src/test/java/org/hibernate/test/bytecode/enhancement/lazy/LazyBasicFieldMergeTest.java

@@ -0,0 +1,166 @@
+/*
+ * 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.test.bytecode.enhancement.lazy;
+
+import javax.persistence.Basic;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.Lob;
+import javax.persistence.OneToOne;
+import javax.persistence.Table;
+
+import org.hibernate.Hibernate;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.cfg.Configuration;
+import org.hibernate.persister.entity.EntityPersister;
+import org.hibernate.tuple.NonIdentifierAttribute;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.bytecode.enhancement.BytecodeEnhancerRunner;
+import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInHibernate;
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author Vlad Mihalcea
+ */
+@TestForIssue( jiraKey = "HHH-11117")
+@RunWith( BytecodeEnhancerRunner.class )
+public class LazyBasicFieldMergeTest extends BaseCoreFunctionalTestCase {
+
+    @Override
+    protected Class<?>[] getAnnotatedClasses() {
+        return new Class<?>[] {
+                Company.class,
+                Manager.class,
+        };
+    }
+
+    @Test
+    public void test() {
+        doInHibernate( this::sessionFactory, session -> {
+            Manager manager = new Manager();
+            manager.setName("John Doe");
+            manager.setResume(new byte[] {1, 2, 3});
+
+            Company company = new Company();
+            company.setName("Company");
+            company.setManager(manager);
+
+            Company _company = (Company) session.merge( company);
+            assertEquals( company.getName(), _company.getName() );
+            assertArrayEquals( company.getManager().getResume(), _company.getManager().getResume() );
+        } );
+    }
+
+    @Entity(name = "Company")
+    @Table(name = "COMPANY")
+    public static class Company {
+
+        @Id
+        @GeneratedValue
+        @Column(name = "COMP_ID")
+        private Long id;
+
+        @Column(name = "NAME")
+        private String name;
+
+        @OneToOne(mappedBy = "company", cascade = javax.persistence.CascadeType.ALL, orphanRemoval = true)
+        private Manager manager;
+
+        public Long getId() {
+            return id;
+        }
+
+        public void setId(Long id) {
+            this.id = id;
+        }
+
+        public Manager getManager() {
+            return manager;
+        }
+
+        public void setManager(Manager manager) {
+            this.manager = manager;
+        }
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+    }
+
+
+    @Entity(name = "Manager")
+    @Table(name = "MANAGER")
+    public static class Manager {
+
+        @Id
+        @GeneratedValue
+        @Column(name = "MAN_ID")
+        private Long id;
+
+        @Column(name = "NAME")
+        private String name;
+
+        @Lob
+        @Column(name = "RESUME")
+        @Basic(fetch = FetchType.LAZY)
+        private byte[] resume;
+
+        @OneToOne(fetch = FetchType.LAZY)
+        @JoinColumn(name = "COMP_ID")
+        private Company company;
+
+        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 byte[] getResume() {
+            return resume;
+        }
+
+        public void setResume(byte[] resume) {
+            this.resume = resume;
+        }
+
+        public Company getCompany() {
+            return company;
+        }
+
+        public void setCompany(Company company) {
+            this.company = company;
+        }
+    }
+}