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HHH-19868 Add test for issue
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‎hibernate-core/src/test/java/org/hibernate/orm/test/query/SelectWithWrongResultTypeTest.java‎

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/*
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* SPDX-License-Identifier: Apache-2.0
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* Copyright Red Hat Inc. and Hibernate Authors
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*/
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package org.hibernate.orm.test.query;
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import jakarta.persistence.CascadeType;
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import jakarta.persistence.Entity;
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import jakarta.persistence.FetchType;
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import jakarta.persistence.GeneratedValue;
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import jakarta.persistence.Id;
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import jakarta.persistence.ManyToOne;
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import jakarta.persistence.OneToMany;
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import jakarta.persistence.Table;
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import jakarta.persistence.Tuple;
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import jakarta.persistence.Version;
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import org.hibernate.InstantiationException;
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import org.hibernate.testing.orm.junit.DomainModel;
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import org.hibernate.testing.orm.junit.JiraKey;
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import org.hibernate.testing.orm.junit.SessionFactory;
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import org.hibernate.testing.orm.junit.SessionFactoryScope;
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import org.junit.jupiter.api.AfterEach;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.Test;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Objects;
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import static org.assertj.core.api.Assertions.assertThat;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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@DomainModel(
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annotatedClasses = {
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SelectWithWrongResultTypeTest.Element.class,
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SelectWithWrongResultTypeTest.Node.class,
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}
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)
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@SessionFactory
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@JiraKey("HHH-19868")
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public class SelectWithWrongResultTypeTest {
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@BeforeEach
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public void setUp(SessionFactoryScope scope) {
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scope.inTransaction(
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session -> {
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Node basik = new Node( "Child" );
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basik.parent = new Node( "Parent" );
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basik.elements.add( new Element( basik ) );
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basik.elements.add( new Element( basik ) );
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basik.elements.add( new Element( basik ) );
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session.persist( basik );
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}
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);
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}
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@AfterEach
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public void tearDown(SessionFactoryScope scope) {
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scope.getSessionFactory().getSchemaManager().truncateMappedObjects();
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}
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@Test
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void testSelectWithWrongResultType(SessionFactoryScope scope) {
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assertThrows( InstantiationException.class, () -> scope.inTransaction( session -> {
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List<Node> resultList = session
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.createSelectionQuery( "select distinct n, e from Node n join n.elements e", Node.class )
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.getResultList();
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assertThat( resultList ).hasSize( 3 );
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} ) );
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assertThrows( InstantiationException.class, () -> scope.inTransaction( session -> {
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List<Node> resultList = session
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.createSelectionQuery( "select distinct n.id, e.id from Node n join n.elements e", Node.class )
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.getResultList();
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assertThat( resultList ).hasSize( 3 );
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} ) );
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assertThrows( InstantiationException.class, () -> scope.inTransaction( session -> {
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List<Node> resultList = session
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.createSelectionQuery(
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"select max(e.id), min(e.id), sum(e.id) from Node n join n.elements e group by n.id order by n.id",
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Node.class )
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.getResultList();
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assertThat( resultList ).hasSize( 1 );
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} ) );
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}
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@Test
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void testSelect(SessionFactoryScope scope) {
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scope.inTransaction( session -> {
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List<Node> resultList = session
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.createSelectionQuery( "select distinct n from Node n left join fetch n.elements", Node.class )
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.getResultList();
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assertThat( resultList ).hasSize( 2 );
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} );
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scope.inTransaction( session -> {
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List<Tuple> resultList = session
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.createSelectionQuery( "select distinct n, e from Node n join n.elements e", Tuple.class )
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.getResultList();
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assertThat( resultList ).hasSize( 3 );
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} );
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scope.inTransaction( session -> {
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List<Tuple> resultList = session
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.createSelectionQuery( "select distinct n.id, e.id from Node n join n.elements e", Tuple.class )
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.getResultList();
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assertThat( resultList ).hasSize( 3 );
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} );
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scope.inTransaction( session -> {
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List<Tuple> resultList = session
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.createSelectionQuery(
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"select max(e.id), min(e.id), sum(e.id) from Node n join n.elements e group by n.id order by n.id",
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Tuple.class )
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.getResultList();
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assertThat( resultList ).hasSize( 1 );
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} );
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}
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@Entity(name = "Element")
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@Table(name = "Element")
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public static class Element {
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@Id
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@GeneratedValue
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Integer id;
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@ManyToOne
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Node node;
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public Element(Node node) {
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this.node = node;
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}
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public Element() {
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}
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}
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@Entity(name = "Node")
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@Table(name = "Node")
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public static class Node {
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@Id
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@GeneratedValue
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Integer id;
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@Version
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Integer version;
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String string;
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@ManyToOne(fetch = FetchType.LAZY,
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cascade = CascadeType.PERSIST)
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Node parent;
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@OneToMany(fetch = FetchType.EAGER,
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cascade = CascadeType.PERSIST,
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mappedBy = "node")
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List<Element> elements = new ArrayList<>();
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public Node(String string) {
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this.string = string;
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}
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public Node() {
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}
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public String getString() {
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return string;
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}
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public void setString(String string) {
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this.string = string;
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}
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@Override
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public String toString() {
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return id + ": " + string;
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}
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@Override
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public boolean equals(Object o) {
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if ( this == o ) {
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return true;
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}
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if ( o == null || getClass() != o.getClass() ) {
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return false;
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}
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Node node = (Node) o;
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return Objects.equals( string, node.string );
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}
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@Override
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public int hashCode() {
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return Objects.hash( string );
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}
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}
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}

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