static void Main(string[] args)
{
NotifyCollection<int> list = new NotifyCollection<int>();
f observer = new f();
list.CollectionChanged += f.HandleEvent;
list.Add(5);
list.Add(6);
list.Add(7);
list.Add(8);
list.RemoveAt(3);
list.RemoveAt(2);
}
public void TopX_Remove_CorrectResult()
{
var collection = new NotifyCollection <Dummy <int> >();
var collCasted = (INotifyCollection <Dummy <int> >)collection;
var top1 = new Dummy <int>(43);
var top2 = new Dummy <int>(42);
var top3 = new Dummy <int>(30);
collection.Add(top1);
collection.Add(top2);
collection.Add(top3);
collection.Add(new Dummy <int>(23));
collection.Add(new Dummy <int>(6));
var topEx = Observable.Expression(() => collCasted.TopX(3, d => d.Item));
var top = topEx.Value;
Assert.AreEqual(top1, top[0].Key);
Assert.AreEqual(top2, top[1].Key);
Assert.AreEqual(top3, top[2].Key);
Assert.AreEqual(3, top.Length);
var changed = false;
topEx.ValueChanged += (o, e) =>
{
Assert.IsNotNull(e.OldValue);
Assert.IsNotNull(e.NewValue);
changed = true;
};
collection.RemoveAt(3);
Assert.AreEqual(top, topEx.Value);
Assert.IsFalse(changed);
collection.Remove(top1);
Assert.IsTrue(changed);
Assert.AreEqual(42, topEx.Value[0].Key.Item);
Assert.AreEqual(30, topEx.Value[1].Key.Item);
Assert.AreEqual(6, topEx.Value[2].Key.Item);
}
