public void UndoTest()
{
var args = new[] { "the", "fat", "cat", "sat", "on", "the", "mat" };
var popList = new PopQueue <string>(args);
Assert.AreEqual(args.Length, popList.Count);
var pop1 = popList.PopFront();
var pop2 = popList.PopFront();
Assert.AreEqual(("the", 0), pop1);
Assert.AreEqual(("fat", 1), pop2);
popList.Undo();
var pop3 = popList.PopFront();
Assert.AreEqual(("fat", 1), pop3);
var pop4 = new PopQueue <string>(args.Take(2).ToArray());
pop4.PopFront();
pop4.PopFront();
pop4.Undo();
pop4.Undo();
Assert.ThrowsException <InvalidOperationException>(() => pop4.Undo());
var pop5 = new PopQueue <string>(new string[] { });
Assert.ThrowsException <InvalidOperationException>(() => pop5.Undo());
}
public void PopListTest()
{
var args = new[] { "the", "fat", "cat", "sat", "on", "the", "mat" };
var popList = new PopQueue <string>(args);
Assert.AreEqual(args.Length, popList.Count);
var popList2 = new PopQueue <string>(args, 2);
Assert.AreEqual(args.Length - 2, popList2.Count);
}
