dbo.put("_id", "good id");
dbo.put("value", "this is a value");
dbo.put("childName", "this is a name");
dbo.put("__discriminator", "FakeChildAggregate");
FakeChildAggregate entity = (FakeChildAggregate) parrentMapper.toInstance(dbo);
assertThat(entity, notNullValue());
assertThat(entity.getId(), is("good id"));
assertThat(entity.getValue(), is("this is a value"));
assertThat(entity.getChildName(), is("this is a name"));
}