public void LetterChanged_IndexIsGreaterThanLength_ExceptionIsThrown()
{
string word = "aax";
var sut = new ChainOfSameLettersDistinguisher(word);
Assert.Throws <ArgumentException>(() => sut.LetterChanged(4));
}
public void LetterChanged_FirstLetterOfGroup_True()
{
string word = "aabx";
var sut = new ChainOfSameLettersDistinguisher(word);
bool result = sut.LetterChanged(2);
Assert.That(result, Is.True);
}
public void LetterChanged_LastLetterOfGroup_False()
{
string word = "aax";
var sut = new ChainOfSameLettersDistinguisher(word);
bool result = sut.LetterChanged(1);
Assert.That(result, Is.False);
}
