public void ClearRemoveAllItems()
{
var collection = new SimpleEventCollection {
"A", "B", "C"
};
collection.Clear();
Assert.AreEqual(0, collection.Count);
Assert.IsFalse(collection.Contains("A"));
Assert.IsFalse(collection.Contains("B"));
Assert.IsFalse(collection.Contains("C"));
Assert.AreEqual(string.Empty, string.Join(string.Empty, collection));
}
public void SuccessfulClearWorks()
{
var collection = new SimpleEventCollection {
"A", "B", "C"
};
string result = string.Empty;
collection.ItemRemoving += (sender, args) => { };
collection.ItemRemoved += (sender, args) => { result += args.Item; };
collection.Clear();
Assert.AreEqual(0, collection.Count);
Assert.AreEqual("ABC", result);
}
public void ForbiddenClearFails()
{
var collection = new SimpleEventCollection {
"A", "B", "C"
};
string result = string.Empty;
collection.ItemRemoving += (sender, args) => { args.IsCanceled = args.Item == "B"; };
collection.ItemRemoved += (sender, args) => { result += args.Item; };
var error = Assert.Throws <ItemsCantBeRemovedException <string> >(() => collection.Clear());
Assert.AreEqual(3, collection.Count);
Assert.IsNullOrEmpty(result);
Assert.AreEqual("B", error.Items.Single());
}
