public void ShouldSeeChangeToBasePropertyWhenBaseObject()
{
var detector = new DerivedChangeDetector();
var tracker = new EntityChangeTracker <TestEntity>(detector);
DerivedEntity entity = new DerivedEntity()
{
IntValue = 123
};
tracker.Attach(entity);
entity.IntValue = 234;
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The wrong number of changes were detected.");
IEntityChange <TestEntity> change = changes.Single();
Assert.AreSame(entity, change.Entity, "A change was detected on the wrong entity.");
Assert.AreEqual(EntityState.Modified, change.State, "The entity should have been modified.");
Assert.AreEqual(1, change.GetChanges().Count(), "The wrong number of properties were seen as changed.");
var propertyChange = change.GetChanges().Single();
Assert.AreEqual(TestEntityChangeDetector.IntDescription, propertyChange.DisplayName, "The wrong property was recorded.");
bool hasBaseChange = change.HasChange(x => x.IntValue);
Assert.IsTrue(hasBaseChange, "The change was not detected.");
bool hasDerivedChange = change.As <DerivedEntity>().HasChange(x => x.IntValue);
Assert.IsTrue(hasDerivedChange, "The change was not detected.");
}
private IEnumerable <IEntityChange <TEntity> > detectChanges(EntityState state)
{
List <IEntityChange <TEntity> > changes = new List <IEntityChange <TEntity> >();
foreach (Entity <TEntity> context in lookup.Values)
{
if (context.State == EntityState.Added && state.HasFlag(EntityState.Added))
{
IEntityChange <TEntity> change = getEntityChange(context);
changes.Add(change);
}
else if (context.State == EntityState.Unmodified && (state.HasFlag(EntityState.Modified) || state.HasFlag(EntityState.Unmodified)))
{
IEntityChange <TEntity> change = getEntityChange(context);
if (change.GetChanges().Any())
{
if (state.HasFlag(EntityState.Modified))
{
changes.Add(change);
}
}
else if (state.HasFlag(EntityState.Unmodified))
{
changes.Add(change);
}
}
else if (context.State == EntityState.Removed && state.HasFlag(EntityState.Removed))
{
IEntityChange <TEntity> change = getEntityChange(context);
changes.Add(change);
}
}
return(changes);
}
public void ShouldDetectChangeToDerivedPropertyWhenAdding()
{
var detector = new DerivedChangeDetector();
var tracker = new EntityChangeTracker <TestEntity>(detector);
DerivedEntity entity = new DerivedEntity()
{
DerivedValue = 123
};
tracker.Add(entity);
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The wrong number of changes were detected.");
IEntityChange <TestEntity> change = changes.Single();
Assert.AreSame(entity, change.Entity, "A change was detected on the wrong entity.");
Assert.AreEqual(EntityState.Added, change.State, "The entity should have been modified.");
Assert.AreEqual(1, change.GetChanges().Count(), "The wrong number of properties were seen as changed.");
}
public void ShouldIncludeChangeToDoubleDerivedProperty()
{
var detector = new DoubleDerivedChangeDetector();
var tracker = new EntityChangeTracker <TestEntity>(detector);
DoubleDerivedEntity entity = new DoubleDerivedEntity()
{
DoubleDerivedValue = "John"
};
tracker.Attach(entity);
entity.DoubleDerivedValue = "Tom";
var changes = tracker.DetectChanges();
Assert.AreEqual(1, changes.Count(), "The wrong number of changes were detected.");
IEntityChange <TestEntity> change = changes.Single();
Assert.AreSame(entity, change.Entity, "A change was detected on the wrong entity.");
Assert.AreEqual(EntityState.Modified, change.State, "The entity should have been modified.");
Assert.AreEqual(1, change.GetChanges().Count(), "The wrong number of properties were seen as changed.");
}