public void IndexerTest()
{
StosWTablicy <char> stos = new StosWTablicy <char>();
stos.Push('a');
stos.Push('b');
stos.Push('c');
Assert.AreEqual(stos[0], 'a');
Assert.AreEqual(stos[1], 'b');
Assert.AreEqual(stos[2], 'c');
stos.Pop();
Assert.AreEqual(stos[0], 'a');
Assert.AreEqual(stos[1], 'b');
}