[#1792] Add test for getSingleResultOrNull and getSingleResult

We are checking that it doesn't throw a NullPointerException
if the result of the query doesn't have any columns names.

Author: DavideD

hibernate-reactive-core/src/test/java/org/hibernate/reactive/CustomOneToOneStoredProcedureSqlTest.java

@@ -9,9 +9,11 @@
 import io.vertx.junit5.VertxTestContext;
 import jakarta.persistence.*;
 
+import org.hibernate.HibernateException;
 import org.hibernate.annotations.SQLDelete;
 import org.hibernate.annotations.SQLInsert;
 import org.hibernate.reactive.testing.DBSelectionExtension;
+import org.hibernate.reactive.testing.ReactiveAssertions;
 
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
@@ -23,6 +25,7 @@
 import java.util.List;
 
 import static java.util.concurrent.TimeUnit.*;
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.*;
 import static org.hibernate.reactive.testing.DBSelectionExtension.*;
 import static org.junit.jupiter.api.Assertions.*;
@@ -84,6 +87,22 @@ public void populateDb(VertxTestContext context) {
 		);
 	}
 
+	@Test
+	public void testFailureWithGetSingleResultOrNull(VertxTestContext context) {
+		test( context, ReactiveAssertions.assertThrown( HibernateException.class, getMutinySessionFactory()
+						.withTransaction( s ->  s.createNativeQuery( INSERT_DRIVER_LICENCE_SQL ).getSingleResultOrNull() ) )
+				.invoke( e -> assertThat( e ).hasMessageContainingAll( "HR000080:", INSERT_DRIVER_LICENCE_SQL ) )
+		);
+	}
+
+	@Test
+	public void testFailureWithGetSingleResult(VertxTestContext context) {
+		test( context, ReactiveAssertions.assertThrown( HibernateException.class, getSessionFactory()
+						.withTransaction( s ->  s.createNativeQuery( INSERT_DRIVER_LICENCE_SQL ).getSingleResult() ) )
+				.thenAccept( e -> assertThat( e ).hasMessageContainingAll( "HR000080:", INSERT_DRIVER_LICENCE_SQL ) )
+		);
+	}
+
 	@Test
 	public void testInsertStoredProcedureDriverLicence(VertxTestContext context) {
 		test( context, openSession().thenCompose( session -> session

hibernate-reactive-core/src/test/java/org/hibernate/reactive/CustomStoredProcedureSqlTest.java

@@ -9,10 +9,12 @@
 import java.util.Collection;
 import java.util.List;
 
+import org.hibernate.HibernateException;
 import org.hibernate.annotations.SQLDelete;
 import org.hibernate.annotations.SQLInsert;
 import org.hibernate.annotations.SQLUpdate;
 import org.hibernate.reactive.testing.DBSelectionExtension;
+import org.hibernate.reactive.testing.ReactiveAssertions;
 
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
@@ -29,6 +31,7 @@
 import jakarta.persistence.Table;
 
 import static java.util.concurrent.TimeUnit.MINUTES;
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.hibernate.reactive.containers.DatabaseConfiguration.DBType.POSTGRESQL;
 import static org.hibernate.reactive.testing.DBSelectionExtension.runOnlyFor;
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -102,6 +105,22 @@ public void populateDb(VertxTestContext context) {
 		);
 	}
 
+	@Test
+	public void testFailureWithGetSingleResultOrNull(VertxTestContext context) {
+		test( context, ReactiveAssertions.assertThrown( HibernateException.class, getMutinySessionFactory()
+				.withTransaction( s ->  s.createNativeQuery( INSERT_SP_SQL ).getSingleResultOrNull() ) )
+				.invoke( e -> assertThat( e ).hasMessageContainingAll( "HR000080:", INSERT_SP_SQL ) )
+		);
+	}
+
+	@Test
+	public void testFailureWithGetSingleResult(VertxTestContext context) {
+		test( context, ReactiveAssertions.assertThrown( HibernateException.class, getSessionFactory()
+						.withTransaction( s ->  s.createNativeQuery( INSERT_SP_SQL ).getSingleResult() ) )
+				.thenAccept( e -> assertThat( e ).hasMessageContainingAll( "HR000080:", INSERT_SP_SQL ) )
+		);
+	}
+
 	@Test
 	public void testInsertStoredProcedure(VertxTestContext context) {
 		test( context, openSession().thenCompose( session -> session