SharedEntityManagerCreator immediately throws TransactionRequiredException on persist, merge, remove etc (as required by JPA spec)

Issue: SPR-11923

spring-orm/src/test/java/org/springframework/orm/jpa/SharedEntityManagerCreatorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2014 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,9 @@
 
 package org.springframework.orm.jpa;
 
+import javax.persistence.EntityManager;
 import javax.persistence.EntityManagerFactory;
+import javax.persistence.TransactionRequiredException;
 
 import org.junit.Test;
 
@@ -40,4 +42,46 @@ public class SharedEntityManagerCreatorTests {
 				is(notNullValue()));
 	}
 
+	@Test(expected = TransactionRequiredException.class)
+	public void transactionRequiredExceptionOnJoinTransaction() {
+		EntityManagerFactory emf = mock(EntityManagerFactory.class);
+		EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(emf);
+		em.joinTransaction();
+	}
+
+	@Test(expected = TransactionRequiredException.class)
+	public void transactionRequiredExceptionOnFlush() {
+		EntityManagerFactory emf = mock(EntityManagerFactory.class);
+		EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(emf);
+		em.flush();
+	}
+
+	@Test(expected = TransactionRequiredException.class)
+	public void transactionRequiredExceptionOnPersist() {
+		EntityManagerFactory emf = mock(EntityManagerFactory.class);
+		EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(emf);
+		em.persist(new Object());
+	}
+
+	@Test(expected = TransactionRequiredException.class)
+	public void transactionRequiredExceptionOnMerge() {
+		EntityManagerFactory emf = mock(EntityManagerFactory.class);
+		EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(emf);
+		em.merge(new Object());
+	}
+
+	@Test(expected = TransactionRequiredException.class)
+	public void transactionRequiredExceptionOnRemove() {
+		EntityManagerFactory emf = mock(EntityManagerFactory.class);
+		EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(emf);
+		em.remove(new Object());
+	}
+
+	@Test(expected = TransactionRequiredException.class)
+	public void transactionRequiredExceptionOnRefresh() {
+		EntityManagerFactory emf = mock(EntityManagerFactory.class);
+		EntityManager em = SharedEntityManagerCreator.createSharedEntityManager(emf);
+		em.refresh(new Object());
+	}
+
 }