public void TestAddingLetters()
{
var letterManager = new LetterManager();
var letterA = new Letter('a', 0);
letterManager.AddLetter(letterA);
var letterB = new Letter('b', 2);
letterManager.AddLetter(letterB);
letterManager.AddLetter(new Letter('c', 5));
Assert.AreEqual(letterA, letterManager.GetElementAt(0));
Assert.AreEqual(letterB, letterManager.GetElementAt(2));
Assert.AreEqual(new Letter('c', 5), letterManager.GetElementAt(5));
}
