HHH-16639 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/batch/BatchAndEnumIdTest.java

@@ -0,0 +1,156 @@
+package org.hibernate.orm.test.batch;
+
+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.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+
+
+@DomainModel(
+		annotatedClasses = {
+				BatchAndEnumIdTest.Property.class
+		}
+)
+@ServiceRegistry(
+		settings = {
+				@Setting(name = AvailableSettings.DEFAULT_BATCH_FETCH_SIZE, value = "2")
+		}
+)
+@SessionFactory
+@JiraKey("HHH-16639")
+public class BatchAndEnumIdTest {
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Property property1 = new Property( Property.Key.KEY1, "value1" );
+					Property property2 = new Property( Property.Key.KEY2, "value2" );
+					session.persist( property1 );
+					session.persist( property2 );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDowm(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session ->
+						session.createMutationQuery( "delete from Property" ).executeUpdate()
+		);
+	}
+
+	@Test
+	public void testGetReference(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Property property = session.getReference( Property.class, Property.Key.KEY1 );
+
+					property.setValue( "value1 updated" );
+					session.merge( property );
+				}
+		);
+	}
+
+	@Test
+	public void testGetReference2(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Property property = session.getReference( Property.class, Property.Key.KEY1 );
+					Property property2 = session.getReference( Property.class, Property.Key.KEY2 );
+
+					property.setValue( "value1 updated" );
+					session.merge( property );
+
+					property2.setValue( "value2 updated" );
+					session.merge( property2 );
+				}
+		);
+	}
+
+	@Test
+	public void testFind(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Property property = session.find( Property.class, Property.Key.KEY1 );
+
+					property.setValue( "value1 updated" );
+					session.merge( property );
+				}
+		);
+	}
+
+	@Test
+	public void testFind2(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Property property = session.find( Property.class, Property.Key.KEY1 );
+					Property property2 = session.find( Property.class, Property.Key.KEY2 );
+
+					property.setValue( "value1 updated" );
+					session.merge( property );
+
+					property2.setValue( "value2 updated" );
+					session.merge( property2 );
+				}
+		);
+	}
+
+	@Entity(name = "Property")
+	@Table(name = "PROPERTY_TABLE")
+	public static class Property {
+
+		public enum Key {
+			KEY1,
+			KEY2,
+			KEY3
+		}
+
+		public Property() {
+		}
+
+		public Property(Key key, String value) {
+			this.key = key;
+			this.value = value;
+		}
+
+		@Id
+		@Column(name = "KEY_COLUMN")
+		@Enumerated(EnumType.STRING)
+		private Key key;
+
+		@Column(name = "VALUE_COLUMN")
+		private String value;
+
+		public Key getKey() {
+			return key;
+		}
+
+		public void setKey(Key key) {
+			this.key = key;
+		}
+
+		public String getValue() {
+			return value;
+		}
+
+		public void setValue(String value) {
+			this.value = value;
+		}
+	}
+
+}