HHH-18321 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/jpa/criteria/CoalesceTest.java

@@ -4,15 +4,24 @@
  */
 package org.hibernate.orm.test.jpa.criteria;
 
+import java.math.BigDecimal;
+import java.util.List;
+
 import org.hibernate.testing.orm.junit.JiraKey;
 import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.Jira;
 import org.hibernate.testing.orm.junit.Jpa;
 
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 import jakarta.persistence.Column;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Embedded;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
+import jakarta.persistence.Tuple;
 import jakarta.persistence.TypedQuery;
 import jakarta.persistence.criteria.CriteriaBuilder;
 import jakarta.persistence.criteria.CriteriaQuery;
@@ -20,13 +29,18 @@ import jakarta.persistence.criteria.Expression;
 import jakarta.persistence.criteria.ParameterExpression;
 import jakarta.persistence.criteria.Root;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 /**
  * @author Will Dazy
  */
-@Jpa(annotatedClasses = CoalesceTest.HHH15291Entity.class)
+@Jpa( annotatedClasses = {
+		CoalesceTest.HHH15291Entity.class,
+		CoalesceTest.ComponentEntity.class,
+		CoalesceTest.ComponentA.class,
+} )
 @JiraKey( value = "HHH-15291")
 public class CoalesceTest {
-
 	@Test
 	public void hhh15291JPQL1Test(EntityManagerFactoryScope scope) {
 		scope.inEntityManager(
@@ -95,9 +109,74 @@ public class CoalesceTest {
 		);
 	}
 
+	@Test
+	@Jira( "https://hibernate.atlassian.net/browse/HHH-18321" )
+	public void testCoalesceInBinaryArithmetic(EntityManagerFactoryScope scope) {
+		scope.inTransaction( entityManager -> {
+			final CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+			final CriteriaQuery<Tuple> cquery = cb.createTupleQuery();
+			final Root<ComponentEntity> root = cquery.from( ComponentEntity.class );
+
+			cquery.select( cb.tuple(
+					root.get( "id" ),
+					cb.diff(
+							cb.coalesce( root.get( "componentA" ).get( "income" ), BigDecimal.ZERO ),
+							cb.coalesce( root.get( "componentA" ).get( "expense" ), BigDecimal.ZERO )
+					)
+			) );
+
+			final List<Tuple> resultList = entityManager.createQuery( cquery ).getResultList();
+			assertThat( resultList ).hasSize( 2 );
+			for ( Tuple result : resultList ) {
+				final Long id = result.get( 0, Long.class );
+				assertThat( result.get( 1, BigDecimal.class ).intValue() ).isEqualTo( id == 1L ? 0 : 1 );
+			}
+		} );
+	}
+
+	@Test
+	@Jira( "https://hibernate.atlassian.net/browse/HHH-18321" )
+	public void testCoalesceInBinaryArithmeticParam(EntityManagerFactoryScope scope) {
+		scope.inTransaction( entityManager -> {
+			final CriteriaBuilder cb = entityManager.getCriteriaBuilder();
+			final CriteriaQuery<Tuple> cquery = cb.createTupleQuery();
+			final Root<ComponentEntity> root = cquery.from( ComponentEntity.class );
+
+			final ParameterExpression<BigDecimal> defaultValue = cb.parameter( BigDecimal.class, "default-value" );
+
+			cquery.select( cb.tuple(
+					root.get( "id" ),
+					cb.diff(
+							defaultValue,
+							cb.coalesce( root.get( "componentA" ).get( "expense" ), defaultValue )
+					)
+			) );
+
+			final List<Tuple> resultList = entityManager.createQuery( cquery )
+					.setParameter( "default-value", BigDecimal.ZERO ).getResultList();
+			assertThat( resultList ).hasSize( 2 );
+			for ( Tuple result : resultList ) {
+				final Long id = result.get( 0, Long.class );
+				assertThat( result.get( 1, BigDecimal.class ).intValue() ).isEqualTo( id == 1L ? -1 : 0 );
+			}
+		} );
+	}
+
+	@BeforeAll
+	public void setUp(EntityManagerFactoryScope scope) {
+		scope.inTransaction( entityManager -> {
+			entityManager.persist( new ComponentEntity( 1L, new ComponentA( BigDecimal.ONE, BigDecimal.ONE ) ) );
+			entityManager.persist( new ComponentEntity( 2L, new ComponentA( BigDecimal.ONE, null ) ) );
+		} );
+	}
+
+	@AfterAll
+	public void tearDown(EntityManagerFactoryScope scope) {
+		scope.inTransaction( entityManager -> entityManager.createQuery( "delete from ComponentEntity" ).executeUpdate() );
+	}
+
 	@Entity(name = "HHH15291Entity")
 	public static class HHH15291Entity {
-
 		@Id
 		@Column(name = "KEY_CHAR")
 		private String KeyString;
@@ -116,53 +195,36 @@ public class CoalesceTest {
 
 		@Column(name = "ITEM_INTEGER1")
 		private Integer itemInteger1;
+	}
 
-		public String getKeyString() {
+	@Entity( name = "ComponentEntity" )
-			return KeyString;
+	static class ComponentEntity {
+		@Id
+		private Long id;
+
+		@Embedded
+		private ComponentA componentA;
+
+		public ComponentEntity() {
 		}
 
-		public void setKeyString(String keyString) {
+		public ComponentEntity(Long id, ComponentA componentA) {
-			KeyString = keyString;
+			this.id = id;
+			this.componentA = componentA;
+		}
+	}
+
+	@Embeddable
+	static class ComponentA {
+		private BigDecimal income;
+		private BigDecimal expense;
+
+		public ComponentA() {
 		}
 
-		public String getItemString1() {
+		public ComponentA(BigDecimal income, BigDecimal expense) {
-			return itemString1;
+			this.income = income;
-		}
+			this.expense = expense;
-
-		public void setItemString1(String itemString1) {
-			this.itemString1 = itemString1;
-		}
-
-		public String getItemString2() {
-			return itemString2;
-		}
-
-		public void setItemString2(String itemString2) {
-			this.itemString2 = itemString2;
-		}
-
-		public String getItemString3() {
-			return itemString3;
-		}
-
-		public void setItemString3(String itemString3) {
-			this.itemString3 = itemString3;
-		}
-
-		public String getItemString4() {
-			return itemString4;
-		}
-
-		public void setItemString4(String itemString4) {
-			this.itemString4 = itemString4;
-		}
-
-		public Integer getItemInteger1() {
-			return itemInteger1;
-		}
-
-		public void setItemInteger1(Integer itemInteger1) {
-			this.itemInteger1 = itemInteger1;
 		}
 	}
 }