public void AssignOnDeleteAction()
{
var hbm = new HbmKey();
var km = new KeyMapper(typeof(Animal), hbm);
km.OnDelete(OnDeleteAction.Cascade);
hbm.ondelete.Should().Be.EqualTo(HbmOndelete.Cascade);
km.OnDelete(OnDeleteAction.NoAction);
hbm.ondelete.Should().Be.EqualTo(HbmOndelete.Noaction);
}