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Usage of the Hibernate @LazyCollection Annotation Article by Abdallah Sawan

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AbdallahSawan 2021-02-16 10:40:43 +02:00
parent 9b1388c6e2
commit 13b16b915a
1 changed files with 25 additions and 11 deletions
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36
persistence-modules/hibernate-annotations/src/test/java/com/baeldung/hibernate/lazyCollection/LazyCollectionTests.java
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@ -9,13 +9,16 @@ import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration; import org.hibernate.cfg.Configuration;
import org.hibernate.dialect.H2Dialect; import org.hibernate.dialect.H2Dialect;
import org.hibernate.service.ServiceRegistry; import org.hibernate.service.ServiceRegistry;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test; import org.junit.After;
import org.springframework.boot.test.context.SpringBootTest; import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import javax.annotation.PostConstruct; import javax.annotation.PostConstruct;
@SpringBootTest
public class LazyCollectionTests { public class LazyCollectionTests {
private static SessionFactory sessionFactory; private static SessionFactory sessionFactory;
@ -24,8 +27,8 @@ public class LazyCollectionTests {
Branch branch; Branch branch;
@PostConstruct @BeforeClass
public void beforeTests() { public static void beforeTests() {
Configuration configuration = new Configuration().addAnnotatedClass(Branch.class).addAnnotatedClass(Employee.class) Configuration configuration = new Configuration().addAnnotatedClass(Branch.class).addAnnotatedClass(Employee.class)
.setProperty("hibernate.dialect", H2Dialect.class.getName()) .setProperty("hibernate.dialect", H2Dialect.class.getName())
.setProperty("hibernate.connection.driver_class", org.h2.Driver.class.getName()) .setProperty("hibernate.connection.driver_class", org.h2.Driver.class.getName())
@ -37,10 +40,10 @@ public class LazyCollectionTests {
sessionFactory = configuration.buildSessionFactory(serviceRegistry); sessionFactory = configuration.buildSessionFactory(serviceRegistry);
setUp();
} }
private void setUp() { @Before
public void setUp() {
session = sessionFactory.openSession(); session = sessionFactory.openSession();
session.beginTransaction(); session.beginTransaction();
@ -80,16 +83,27 @@ public class LazyCollectionTests {
@Test @Test
public void testLazyFetching() { public void testLazyFetching() {
Assertions.assertFalse(Hibernate.isInitialized(branch.getMainEmployees())); Assert.assertFalse(Hibernate.isInitialized(branch.getMainEmployees()));
} }
@Test @Test
public void testEagerFetching() { public void testEagerFetching() {
Assertions.assertTrue(Hibernate.isInitialized(branch.getSubEmployees())); Assert.assertTrue(Hibernate.isInitialized(branch.getSubEmployees()));
} }
@Test @Test
public void testExtraFetching() { public void testExtraFetching() {
Assertions.assertFalse(Hibernate.isInitialized(branch.getAdditionalEmployees())); Assert.assertFalse(Hibernate.isInitialized(branch.getAdditionalEmployees()));
}
@After
public void tearDown() {
session.getTransaction().commit();
session.close();
}
@AfterClass
public static void afterTests() {
sessionFactory.close();
} }
} }