What's the link between @Transactional and cascading?
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/test-beans.xml")
@TransactionConfiguration
@Transactional
public class MyUnitTest {

...

  @Test
  public void testSomething() {}

...

}

<context:annotation-config />

  <tx:annotation-driven transaction-manager="transactionManager" />

  <context:component-scan base-package="com.foo.bar"  />

  <bean id="jpaTemplate" class="org.springframework.orm.jpa.JpaTemplate">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
  </bean>

  <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="persistenceXmlLocation" value="/META-INF/persistence.xml"/>
    <property name="persistenceUnitName" value="bar" />
  </bean>

  <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="entityManagerFactory" />
  </bean>

<persistence-unit name="bar" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <properties>
      <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
      <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/bar" />
      <property name="hibernate.connection.username" value="bar" />
      <property name="hibernate.connection.password" value="pwd" />
      <property name="hibernate.cache.provider_class" value="org.hibernate.cache.NoCacheProvider"/>
      <property name="hibernate.hbm2ddl.auto" value="create"/>
      <property name="dialect" value="org.hibernate.dialect.MySQLDialect" />
    </properties>
  </persistence-unit>

final EntityManager em = jpaTemplate.getEntityManagerFactory().createEntityManager();
return new QueryIterator<T>(em.createQuery("FROM Foo"));

jpaTemplate.execute(new JpaCallback() {
  @Override
  public Object doInJpa(final EntityManager em) throws PersistenceException {
    return new QueryIterator<T>(em.createQuery("FROM Foo"));
  }
});