public void ShouldAddOneAssociateToMany()
{
var associate = new ManyToOneModel {
Title = "TheOne"
};
var firstParent = new TestNode {
ManyToOneAssociated = associate
};
using (var context = new TestDbContext())
{
context.ManyToOneModels.Add(associate);
context.Nodes.Add(firstParent);
context.SaveChanges();
} // Simulate detach
var secondParent = new TestNode {
ManyToOneAssociated = associate
};
using (var context = new TestDbContext())
{
secondParent = context.UpdateGraph(secondParent, map => map.AssociatedEntity(e => e.ManyToOneAssociated));
context.SaveChanges();
Assert.IsNotNull(secondParent.ManyToOneAssociated);
Assert.AreEqual(associate.Id, secondParent.ManyToOneAssociated.Id);
Assert.AreEqual(1, context.ManyToOneModels.Count());
}
}
public void ShouldRemoveOneAssociateFromMany()
{
var associate = new ManyToOneModel {
Title = "TheOne"
};
var firstParent = new TestNode {
ManyToOneAssociated = associate
};
var secondParent = new TestNode {
ManyToOneAssociated = associate
};
using (var context = new TestDbContext())
{
context.ManyToOneModels.Add(associate);
context.Nodes.Add(firstParent);
context.Nodes.Add(secondParent);
context.SaveChanges();
Assert.AreEqual(1, context.ManyToOneModels.Count());
} // Simulate detach
firstParent.ManyToOneAssociated = null;
using (var context = new TestDbContext())
{
firstParent = context.UpdateGraph(firstParent, map => map.AssociatedEntity(e => e.ManyToOneAssociated));
context.SaveChanges();
firstParent = context.Nodes.Include(n => n.ManyToOneAssociated).Single(n => n.Id == firstParent.Id);
Assert.IsNull(firstParent.ManyToOneAssociated);
Assert.AreEqual(1, context.ManyToOneModels.Count());
secondParent = context.Nodes.Include(n => n.ManyToOneAssociated).Single(n => n.Id == secondParent.Id);
Assert.IsNotNull(secondParent.ManyToOneAssociated);
Assert.AreEqual(associate.Id, secondParent.ManyToOneAssociated.Id);
}
secondParent.ManyToOneAssociated = null;
using (var context = new TestDbContext())
{
secondParent = context.UpdateGraph(secondParent, map => map.AssociatedEntity(e => e.ManyToOneAssociated));
context.SaveChanges();
secondParent = context.Nodes.Include(n => n.ManyToOneAssociated).Single(n => n.Id == secondParent.Id);
Assert.IsNull(secondParent.ManyToOneAssociated);
Assert.AreEqual(1, context.ManyToOneModels.Count());
}
}