Add tests to prove that the `hibernate.jpa.compliance.proxy` behavior works as expected

hibernate-core/src/test/java/org/hibernate/test/lazyload/ManyToOneLazyLoadingByIdJpaComplianceTest.java

@@ -0,0 +1,40 @@
+/*
+ * 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.test.lazyload;
+
+import java.util.Map;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+
+import org.hibernate.LazyInitializationException;
+import org.hibernate.cfg.AvailableSettings;
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+
+import org.junit.Test;
+
+import org.apache.xpath.operations.Bool;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+/**
+ * @author Vlad Mihalcea
+ */
+public class ManyToOneLazyLoadingByIdJpaComplianceTest extends ManyToOneLazyLoadingByIdTest {
+
+	@Override
+	protected void addMappings(Map settings) {
+		settings.put( AvailableSettings.JPA_PROXY_COMPLIANCE, Boolean.TRUE );
+	}
+
+	protected void assertProxyState(Continent continent) {
+		assertEquals( "Europe", continent.getName() );
+	}
+}

hibernate-core/src/test/java/org/hibernate/test/lazyload/ManyToOneLazyLoadingByIdTest.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.test.lazyload;
+
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.Id;
+import javax.persistence.ManyToOne;
+
+import org.hibernate.LazyInitializationException;
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+
+import org.junit.Test;
+
+import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+/**
+ * @author Vlad Mihalcea
+ */
+public class ManyToOneLazyLoadingByIdTest extends BaseEntityManagerFunctionalTestCase {
+
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class<?>[] {
+				Continent.class,
+				Country.class
+		};
+	}
+
+	@Test
+	public void testLazyLoadById() {
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			Continent continent = new Continent();
+			continent.setId( 1L );
+			continent.setName( "Europe" );
+
+			entityManager.persist( continent );
+
+			Country country = new Country();
+			country.setId( 1L );
+			country.setName( "Romania" );
+			country.setContinent( continent );
+
+			entityManager.persist( country );
+		} );
+
+		Continent continent = doInJPA( this::entityManagerFactory, entityManager -> {
+			Country country = entityManager.find( Country.class, 1L );
+
+			country.getContinent().getId();
+
+			return country.getContinent();
+		} );
+
+		assertEquals( 1L, (long) continent.getId());
+	}
+
+	protected void assertProxyState(Continent continent) {
+		try {
+			continent.getName();
+
+			fail( "Should throw LazyInitializationException!" );
+		}
+		catch (LazyInitializationException expected) {
+
+		}
+	}
+
+	@Entity(name = "Country")
+	public static class Country {
+		@Id
+		private Long id;
+
+		private String name;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		private Continent continent;
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+
+		public Continent getContinent() {
+			return continent;
+		}
+
+		public void setContinent(Continent continent) {
+			this.continent = continent;
+		}
+	}
+
+	@Entity(name = "Continent")
+	public static class Continent {
+		@Id
+		private Long id;
+
+		private String name;
+
+		public Long getId() {
+			return id;
+		}
+
+		public void setId(Long id) {
+			this.id = id;
+		}
+
+		public String getName() {
+			return name;
+		}
+
+		public void setName(String name) {
+			this.name = name;
+		}
+	}
+}