group.setTitle("asdf");
group.setDescription("Description");
group.setMemberIds(Arrays.asList(new String[] {"1", "2", "3"}));
group.setOwnerId(USER2ID);
MongoDbGroup mongoGroup = converter.convert(group);
assertThat(mongoGroup.getId(), is(equalTo(USER1ID)));
assertThat(mongoGroup.getTitle(), is(equalTo("asdf")));
assertThat(mongoGroup.getDescription(), is("Description"));
assertThat(mongoGroup.getMemberIds().size(), is(3));
assertThat(mongoGroup.getOwnerId(), is(USER2ID));
}//end convert_valid