public void TestReadPreferredParentRelationship()
{
var father = tree.AddPerson(TestBacking.GetCreateMalePerson());
cleanup.Add(father);
var son = (FamilyTreePersonState)tree.AddPerson(TestBacking.GetCreateMalePerson()).Get();
cleanup.Add(son);
var chapr = tree.AddChildAndParentsRelationship(TestBacking.GetCreateChildAndParentsRelationship(father, null, son));
cleanup.Add(chapr);
var me = tree.ReadCurrentUser();
// Ensure the target relationship exists
var relationship = ((FamilyTreePersonParentsState)son.ReadParents()).ChildAndParentsRelationships.First();
var state = son.ReadChildAndParentsRelationship(relationship);
tree.UpdatePreferredParentRelationship(me.User.TreeUserId, son.Person.Id, state);
var state2 = (FamilyTreeRelationshipState)tree.ReadPreferredParentRelationship(me.User.TreeUserId, son.Person.Id);
Assert.AreEqual(HttpStatusCode.SeeOther, state2.Response.StatusCode);
Assert.IsNotNull(state2.Headers.Get("Location").Single());
}