public void TrimExcess()
        {
            stos = new StosWTablicy <char>();

            stos.Push(RandomElement);
            stos.Push(RandomElement);
            stos.Push(RandomElement);
            stos.Push(RandomElement);

            stos.Clear();
            stos.TrimExcess();

            Assert.AreEqual(0, stos.Count);
        }