@Test
  public void saveThisTweet() throws Exception {

    Tweet tweet = new Tweet("100000", "XebiaFR", new Date(), "Discovering #mongodb");

    DBObject dbObject = new BasicDBObject();
    dbObject.put("from_user_id", tweet.getUserId());
    dbObject.put("from_user_name", tweet.getUserName());
    dbObject.put("created_at", tweet.getCreateAt());
    dbObject.put("text", tweet.getText());

    collection.save(dbObject, WriteConcern.SAFE);

    assertThat(collection.count()).isGreaterThan(0);
  }