@Test
public void canUpdateAnEntity() throws Exception {
Friend john = new Friend("John", "21 Jump Street");
collection.save(john);
john.setAddress("new address");
collection.save(john);
ObjectId johnId = john.getId();
Friend johnWithNewAddress = collection.findOne(johnId).as(Friend.class);
assertThat(johnWithNewAddress.getId()).isEqualTo(johnId);
assertThat(johnWithNewAddress.getAddress()).isEqualTo("new address");
}
