title: Getting LazyInitializationException on JUnit Test Case
body: <p>Problem running JUnit Test inside a Spring MVC Application. Test 1 (insertTweet) seems to run fine, however on Test 2 I get an "LazyInitializationException" Exception (see full stactrace below).  I understand why it is thrown but not sure why the session is closing and how to reopen it at the begining of every test 2 (or keep the existing session open for the remaining tests to complete)?  I have pasted the entire StackTrace thrown along with Test Classes. </p>
  
  <pre><code>org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.project.user.User.tweets, could not initialize proxy - no Session
      at org.hibernate.collection.internal.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:566)
      at org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186)
      at org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:545)
      at org.hibernate.collection.internal.AbstractPersistentCollection.write(AbstractPersistentCollection.java:370)
      at org.hibernate.collection.internal.PersistentBag.add(PersistentBag.java:291)
      at com.project.core.tweet.Tweet.&lt;init&gt;(Tweet.java:113)
      at com.project.core.service.impl.FanoutServiceTester.insertTweet(FanoutServiceTester.java:69)
      at com.project.core.service.impl.FanoutServiceTester.testInsertRetweet(FanoutServiceTester.java:62)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
      at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
      at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
      at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
      at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
  </code></pre>
  
  <hr>
  
  <pre><code>@RunWith(SpringJUnit4ClassRunner.class)
  @TestExecutionListeners({ServiceTestExecutionListener.class})
  @ActiveProfiles("test")
  public abstract class AbstractServiceImplTest extends AbstractTransactionalJUnit4SpringContextTests {
  
      @PersistenceContext
      protected EntityManager em;
  
      @Autowired protected TweetService tweetService;
      @Autowired protected UserService userService;
  
  }
  
  
  public class FanoutServiceTester extends AbstractServiceImplTest{
      private static User user = null;
      private static User userTwo = null;
  
  
  
      @Before
      public void setUp() throws Exception {
  
          user = userService.findByUserId(1);
  
  
          //UserTwo Follows User One
          userTwo  = userService.findByUserId(2);
  
  
  
      }
  
  
      @Test
      public final void testInsertTweet() {       
          insertTweet();
  
          //Assert Here
  
      }
  
  
  
      @Test
      public final void testInsertRetweet() {
          insertTweet();
          //Assert Here
  
      }
  
  
      private Tweet insertTweet(){
          Tweet tweet = new Tweet(user);
          String text = "This is a Message";  
          tweet.setTweetText(text);
          Tweet saved = tweetService.save(tweet);
          return saved;
      }
  
  }
  </code></pre>