@Test
public void canSaveWithACustomTypeId() throws Exception {
ExternalFriend john = new ExternalFriend(999, "Robert");
collection.save(john);
ExternalFriend result = collection.findOne().as(ExternalFriend.class);
assertThat(result.getId()).isEqualTo(999);
}
@Test
public void canUpdateWithACustomTypeId() throws Exception {
ExternalFriend friend = new ExternalFriend(999, "Robert");
collection.save(friend);
friend.setName("Robert");
collection.save(friend);
ExternalFriend result = collection.findOne().as(ExternalFriend.class);
assertThat(result.getId()).isEqualTo(999);
}