public void AddAddsItem()
{
var collection = new SimpleEventCollection();
collection.Add("A");
collection.Add("B");
collection.Add("C");
Assert.AreEqual(3, collection.Count);
Assert.IsTrue(collection.Contains("A"));
Assert.IsTrue(collection.Contains("B"));
Assert.IsTrue(collection.Contains("C"));
Assert.AreEqual("ABC", string.Join(string.Empty, collection));
}
public void AddWorksOnlyIfAllowed()
{
var collection = new SimpleEventCollection();
string result = string.Empty;
collection.ItemAdding += (sender, args) => { args.IsCanceled = args.Item == "B"; };
collection.ItemAdded += (sender, args) => { result += args.Item; };
collection.Add("A");
collection.Add("B");
collection.Add("C");
Assert.AreEqual(2, collection.Count);
Assert.IsTrue(collection.Contains("A"));
Assert.IsFalse(collection.Contains("B"));
Assert.IsTrue(collection.Contains("C"));
Assert.AreEqual("AC", result);
}