1 /** 2 * Copyright (C) 2010 Google, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.inject.persist.jpa; 18 19 import com.google.inject.Guice; 20 import com.google.inject.Inject; 21 import com.google.inject.Injector; 22 import com.google.inject.Provider; 23 import com.google.inject.persist.PersistService; 24 import com.google.inject.persist.Transactional; 25 26 import junit.framework.TestCase; 27 28 import javax.persistence.EntityManager; 29 import javax.persistence.EntityManagerFactory; 30 31 /** 32 * A test around providing sessions (starting, closing etc.) 33 * 34 * @author Dhanji R. Prasanna (dhanji@gmail.com) 35 */ 36 37 public class EntityManagerProvisionTest extends TestCase { 38 private Injector injector; 39 setUp()40 public void setUp() { 41 injector = Guice.createInjector(new JpaPersistModule("testUnit")); 42 43 //startup persistence 44 injector.getInstance(PersistService.class).start(); 45 } 46 tearDown()47 public final void tearDown() { 48 injector.getInstance(EntityManagerFactory.class).close(); 49 } 50 testEntityManagerLifecyclePerTxn()51 public void testEntityManagerLifecyclePerTxn() { 52 //obtain em 53 JpaDao dao = injector.getInstance(JpaDao.class); 54 55 //obtain same em again (bound to txn) 56 JpaTestEntity te = new JpaTestEntity(); 57 58 dao.persist(te); 59 60 //im not sure this hack works... 61 assertFalse("Duplicate entity managers crossing-scope", 62 dao.lastEm.equals(injector.getInstance(EntityManager.class))); 63 64 //try to start a new em in a new txn 65 dao = injector.getInstance(JpaDao.class); 66 67 assertFalse("EntityManager wasnt closed and reopened properly around txn" 68 + " (persistent object persists)", dao.contains(te)); 69 } 70 testEntityManagerLifecyclePerTxn2()71 public void testEntityManagerLifecyclePerTxn2() { 72 //obtain em 73 JpaDao dao = injector.getInstance(JpaDao.class); 74 75 //obtain same em again (bound to txn) 76 JpaTestEntity te = new JpaTestEntity(); 77 78 dao.persist(te); 79 80 //im not sure this hack works... 81 assertFalse("Duplicate entity managers crossing-scope", 82 dao.lastEm.equals(injector.getInstance(EntityManager.class))); 83 84 //try to start a new em in a new txn 85 dao = injector.getInstance(JpaDao.class); 86 87 assertFalse("EntityManager wasnt closed and reopened properly around txn" 88 + " (persistent object persists)", dao.contains(te)); 89 } 90 91 public static class JpaDao { 92 private final Provider<EntityManager> em; 93 EntityManager lastEm; 94 95 @Inject JpaDao(Provider<EntityManager> em)96 public JpaDao(Provider<EntityManager> em) { 97 this.em = em; 98 } 99 100 @Transactional persist(T t)101 public <T> void persist(T t) { 102 lastEm = em.get(); 103 assertTrue("em is not open!", lastEm.isOpen()); 104 assertTrue("no active txn!", lastEm.getTransaction().isActive()); 105 lastEm.persist(t); 106 107 assertTrue("Persisting object failed", lastEm.contains(t)); 108 } 109 110 @Transactional contains(T t)111 public <T> boolean contains(T t) { 112 if (null == lastEm) { 113 lastEm = em.get(); 114 } 115 return lastEm.contains(t); 116 } 117 } 118 } 119