HHH-16241 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/converted/converter/YearMonthConverterTest.java

@@ -0,0 +1,120 @@
+/*
+ * 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.converted.converter;
+
+import java.io.Serializable;
+import java.time.YearMonth;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.AttributeConverter;
+import jakarta.persistence.Convert;
+import jakarta.persistence.Converter;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Marco Belladelli
+ */
+@SessionFactory
+@DomainModel( annotatedClasses = {
+		YearMonthConverterTest.DemoEntity.class
+} )
+public class YearMonthConverterTest {
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			session.persist( new DemoEntity( 1L, YearMonth.of( 2022, 12 ) ) );
+			session.persist( new DemoEntity( 2L, YearMonth.of( 2023, 1 ) ) );
+			session.persist( new DemoEntity( 3L, YearMonth.of( 2023, 2 ) ) );
+			session.persist( new DemoEntity( 4L, YearMonth.of( 2023, 3 ) ) );
+		} );
+	}
+
+	@AfterAll
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction( session -> session.createMutationQuery( "delete from DemoEntity" ).executeUpdate() );
+	}
+
+	@Test
+	public void testSimpleQuery(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final YearMonth ym = session.createQuery(
+					"select de.yearMonth from DemoEntity de where de.id = 1L",
+					YearMonth.class
+			).getSingleResult();
+			assertThat( ym ).isEqualTo( YearMonth.of( 2022, 12 ) );
+		} );
+	}
+
+	@Test
+	public void testMax(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final YearMonth max = session.createQuery(
+					"select max(de.yearMonth) from DemoEntity de",
+					YearMonth.class
+			).getSingleResult();
+			assertThat( max ).isEqualTo( YearMonth.of( 2023, 3 ) );
+		} );
+	}
+
+	@Test
+	public void testMaxComparison(SessionFactoryScope scope) {
+		scope.inTransaction( session -> {
+			final DemoEntity de = session.createQuery(
+					"from DemoEntity de where de.yearMonth = (select max(sub.yearMonth) from DemoEntity sub)",
+					DemoEntity.class
+			).getSingleResult();
+			assertThat( de.getId() ).isEqualTo( 4L );
+		} );
+	}
+
+	@Entity( name = "DemoEntity" )
+	public static class DemoEntity implements Serializable {
+		@Id
+		private Long id;
+
+		@Convert( converter = YearMonthConverter.class )
+		private YearMonth yearMonth;
+
+		public DemoEntity() {
+		}
+
+		public DemoEntity(Long id, YearMonth yearMonth) {
+			this.id = id;
+			this.yearMonth = yearMonth;
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public YearMonth getYearMonth() {
+			return yearMonth;
+		}
+	}
+
+	@Converter( autoApply = true )
+	public static class YearMonthConverter implements AttributeConverter<YearMonth, Integer> {
+		@Override
+		public Integer convertToDatabaseColumn(YearMonth attribute) {
+			return attribute == null ? null : ( attribute.getYear() * 100 ) + attribute.getMonth().getValue();
+		}
+
+		@Override
+		public YearMonth convertToEntityAttribute(Integer dbData) {
+			return dbData == null ? null : YearMonth.of( dbData / 100, dbData % 100 );
+		}
+	}
+}