public void Should_write_the_references()
        {
            var joinedSubclassMapping = new JoinedSubclassMapping();
            joinedSubclassMapping.AddReference(new ManyToOneMapping());

            _mocker.Get<IHbmWriter<ManyToOneMapping>>()
                .Expect(x => x.Write(joinedSubclassMapping.References.First())).Return(new HbmManyToOne());

            _subclassWriter.VerifyXml(joinedSubclassMapping)
                .Element("many-to-one").Exists();
        }