public void InputEmptyStringInSameCharacters()
{
string str = "";
MaxCharacters maxCharacters = new MaxCharacters();
Assert.ThrowsException <System.Exception>(() => maxCharacters.GetMaxCountDifferentCharacters(str));
}
public void InputStringWithLastSameValue()
{
string str = "aaabcddd";
int expected = 4;
MaxCharacters maxCharacters = new MaxCharacters();
int actual = maxCharacters.GetMaxCountDifferentCharacters(str);
Assert.AreEqual(expected, actual, "Does not converge");
}