HHH-15065: Test that SQL statements are deterministic when using entity graphs

hibernate-core/src/test/java/org/hibernate/orm/test/graph/HHH15065Test.java

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+/*
+ * 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.graph;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.List;
+
+import org.hibernate.graph.RootGraph;
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.jdbc.SQLStatementInspector;
+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.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+
+@TestForIssue(jiraKey = "HHH-15065")
+@DomainModel(
+	annotatedClasses = {
+		HHH15065Test.Book.class,
+		HHH15065Test.Person.class,
+	}
+)
+@SessionFactory
+class HHH15065Test {
+
+	@Test
+	void testDeterministicStatementWithEntityGraphHavingMultipleAttributes(SessionFactoryScope scope) throws Exception {
+		scope.inSession( session -> {
+			RootGraph<Book> entityGraph = session.createEntityGraph( Book.class );
+			entityGraph.addAttributeNodes( "author", "coAuthor", "editor", "coEditor" );
+
+			session.createQuery( "select book from Book book", Book.class )
+				.setHint( "javax.persistence.fetchgraph", entityGraph )
+				.getResultList();
+		} );
+
+		SQLStatementInspector statementInspector = (SQLStatementInspector) scope.getStatementInspector();
+		List<String> sqlQueries = statementInspector.getSqlQueries();
+		assertEquals( 1, sqlQueries.size() );
+		assertEquals( "select b1_0.id,a1_0.id,c1_0.id,c2_0.id,e1_0.id" +
+					 " from Book b1_0" +
+					 " left join Person a1_0 on a1_0.id=b1_0.author_id" +
+					 " left join Person c1_0 on c1_0.id=b1_0.coAuthor_id" +
+					 " left join Person c2_0 on c2_0.id=b1_0.coEditor_id" +
+					 " left join Person e1_0 on e1_0.id=b1_0.editor_id", sqlQueries.get(0) );
+	}
+
+	@Entity(name = "Book")
+	public static class Book {
+		@Id
+		Long id;
+
+		@ManyToOne
+		Person author;
+
+		@ManyToOne
+		Person coAuthor;
+
+		@ManyToOne
+		Person editor;
+
+		@ManyToOne
+		Person coEditor;
+	}
+
+	@Entity(name = "Person")
+	public class Person {
+		@Id
+		Long id;
+	}
+
+}