public void SetLazy() { var subClass = typeof(Inherited); var mapdoc = new HbmMapping(); var mapper = new JoinedSubclassMapper(subClass, mapdoc); mapper.Lazy(true); var hbmEntity = mapdoc.JoinedSubclasses[0]; hbmEntity.UseLazy.Should().Not.Have.Value(); mapper.Lazy(false); hbmEntity.UseLazy.Should().Be(false); }