public void ShouldAddRelationIfPreviousValueWasNull()
{
var node1 = new TestNode { Title = "New Node" };
var associated = new OneToOneAssociatedModel { Title = "Associated Node" };
using (var context = new TestDbContext())
{
context.Nodes.Add(node1);
context.OneToOneAssociatedModels.Add(associated);
context.SaveChanges();
} // Simulate detach
node1.OneToOneAssociated = associated;
using (var context = new TestDbContext())
{
// Setup mapping
context.UpdateGraph(node1, map => map
.AssociatedEntity(p => p.OneToOneAssociated));
context.SaveChanges();
var node2 = context.Nodes.Include(p => p.OneToOneAssociated).Single(p => p.Id == node1.Id);
Assert.IsNotNull(node2);
Assert.IsTrue(node2.OneToOneAssociated.OneParent == node2);
}
}
public void ShouldReplaceReferenceIfNewEntityIsNotPreviousEntity()
{
var node1 = new TestNode {
Title = "New Node",
OneToOneAssociated = new OneToOneAssociatedModel { Title = "Associated Node" }
};
var otherModel = new OneToOneAssociatedModel { Title = "Hello" };
using (var context = new TestDbContext())
{
context.Nodes.Add(node1);
context.OneToOneAssociatedModels.Add(otherModel);
context.SaveChanges();
} // Simulate detach
node1.OneToOneAssociated = otherModel;
using (var context = new TestDbContext())
{
// Setup mapping
context.UpdateGraph(node1, map => map
.AssociatedEntity(p => p.OneToOneAssociated));
context.SaveChanges();
var node2 = context.Nodes.Include(p => p.OneToOneAssociated).Single(p => p.Id == node1.Id);
Assert.IsNotNull(node2);
Assert.IsTrue(node2.OneToOneAssociated.OneParent == node2);
// should not delete it as it is associated and no cascade rule set.
Assert.IsTrue(context.OneToOneAssociatedModels.Single(p => p.Id != otherModel.Id).OneParent == null);
}
}