public static void Main()
{
Console.WriteLine(PrintMessages.CustomIterator);
ConcreteAggregate <int> collection = new ConcreteAggregate <int>();
collection.Add(1);
collection.Add(2);
collection.Add(3);
collection.Add(4);
collection.Add(5);
IIterator <int> iterator = collection.CreateIterator();
while (iterator.Next())
{
int item = iterator.Current;
Console.WriteLine(item);
}
Console.WriteLine(new string('-', 50));
Console.WriteLine(PrintMessages.NETIterator);
IEnumerable <int> elements = new List <int>()
{
1, 2, 3, 4, 5
};
IEnumerator <int> enumerator = elements.GetEnumerator();
while (enumerator.MoveNext())
{
int currentElement = enumerator.Current;
Console.WriteLine(currentElement);
}
}
static void IteratorExample()
{
var aggregate = new ConcreteAggregate();
aggregate.Add(3);
aggregate.Add(5);
aggregate.Add(2);
var iterator = aggregate.CreateIterator();
for (object current = iterator.First(); !iterator.IsDone(); current = iterator.Next())
{
Console.WriteLine(current);
}
}
public void TestIterator()
{
decimal expected =
this._shopcart[0].UnitPrice * this._shopcart[0].Amount * 0.8M +
this._shopcart[2].UnitPrice * this._shopcart[2].Amount;
decimal actual = 0;
Aggregate aggregate = new ConcreteAggregate(ProductTypeEnum.Book);
this._shopcart.ForEach(prod =>
{
aggregate.Add(prod);
});
#region 改寫Visitor單元測試
IObjectStructure checkout = new ObjectStructure();
//Attach the elements into ObjectStructure
checkout.Elements = aggregate.GetAll();
//Accept all the elements and execute the strategy from certain Visitor
checkout.Accept(new VisitorDiscount4Count());
actual = checkout.Elements.Sum(x => x.TotalPrice);
Assert.Equal(expected, actual);
#endregion
}
private void LoadAgg(ConcreteAggregate agg)
{
agg.Add("Verizon : Hayden");
agg.Add("Verizon : William");
agg.Add("AT&T : Matt");
agg.Add("AT&T : Frank");
agg.Add("Sprint : Shawn");
agg.Add("T-Mobile : Kat");
}
private void PopulateAgg(ConcreteAggregate aggregate)
{
aggregate.Add("Ben");
aggregate.Add("Abbie");
aggregate.Add("Anna");
aggregate.Add("Berry");
aggregate.Add("Balthasar");
aggregate.Add("Carol");
aggregate.Add("Camren");
aggregate.Add("Cori");
aggregate.Add("Casandra");
aggregate.Add("David");
aggregate.Add("Aaron");
aggregate.Add("Dylan");
}