Program: 176305
Project: 176305
Buggy source:
@Test public void testJPAQuery(){
  BlogPost p1=prepareBlogPost1();
  BlogPost p2=prepareBlogPost2();
  em.persist(p1);
  em.persist(p2);
  Query q=em.createQuery("String_Node_Str");
  List<BlogPost> allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(2,allPosts.size());
  assertPost1(allPosts.get(0));
  assertPost2(allPosts.get(1));
  q=em.createQuery("String_Node_Str");
  q.setParameter("String_Node_Str",1);
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertPost1(allPosts.get(0));
  q=em.createQuery("String_Node_Str");
  q.setParameter("String_Node_Str","String_Node_Str");
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertPost2(allPosts.get(0));
  q=em.createQuery("String_Node_Str");
  modifyBlogPost1(p1);
  q.setParameter("String_Node_Str",p1.getBody());
  q.setParameter("String_Node_Str",p1.getTags());
  q.setParameter("String_Node_Str",p1.getLikedBy());
  q.setParameter("String_Node_Str",p1.getComments());
  int updatedRecords=q.executeUpdate();
  em.clear();
  q=em.createQuery("String_Node_Str");
  q.setParameter("String_Node_Str",1);
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertUpdatedPost1(allPosts.get(0));
  q=em.createQuery("String_Node_Str");
  int deleteCount=q.executeUpdate();
  Assert.assertEquals(2,deleteCount);
  em.clear();
  q=em.createQuery("String_Node_Str");
  allPosts=q.getResultList();
  Assert.assertTrue(allPosts == null || allPosts.isEmpty());
}

Fixed version (ground truth):
@Test public void testJPAQuery(){
  BlogPost p1=prepareBlogPost1();
  BlogPost p2=prepareBlogPost2();
  em.persist(p1);
  em.persist(p2);
  Query q=em.createQuery("String_Node_Str");
  List<BlogPost> allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(2,allPosts.size());
  assertPost1(allPosts.get(0));
  assertPost2(allPosts.get(1));
  q=em.createQuery("String_Node_Str");
  q.setParameter("String_Node_Str",1);
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertPost1(allPosts.get(0));
  q=em.createQuery("String_Node_Str");
  q.setParameter("String_Node_Str","String_Node_Str");
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertPost2(allPosts.get(0));
  q=em.createQuery("String_Node_Str");
  modifyBlogPost1(p1);
  q.setParameter("String_Node_Str",p1.getBody());
  q.setParameter("String_Node_Str",p1.getTags());
  q.setParameter("String_Node_Str",p1.getLikedBy());
  q.setParameter("String_Node_Str",p1.getComments());
  int updatedRecords=q.executeUpdate();
  em.clear();
  q=em.createQuery("String_Node_Str");
  q.setParameter("String_Node_Str",1);
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertUpdatedPost1(allPosts.get(0));
  em.clear();
  q=em.createNamedQuery("String_Node_Str");
  allPosts=q.getResultList();
  Assert.assertNotNull(allPosts);
  Assert.assertFalse(allPosts.isEmpty());
  Assert.assertEquals(1,allPosts.size());
  assertPost2(allPosts.get(0));
  q=em.createQuery("String_Node_Str");
  int deleteCount=q.executeUpdate();
  Assert.assertEquals(2,deleteCount);
  em.clear();
  q=em.createQuery("String_Node_Str");
  allPosts=q.getResultList();
  Assert.assertTrue(allPosts == null || allPosts.isEmpty());
}