{
twitter.createEntityManager();
UserMongo user1 = twitter.findUserById(userId1);
assertUser1(user1);
user1.setPersonalDetail(new PersonalDetailMongo("Vivek", "unknown", "Married"));
user1.addTweet(new TweetMongo("My Third Tweet", "iPhone"));
twitter.mergeUser(user1);
UserMongo user1AfterMerge = twitter.findUserById(userId1);