public void ListTestRemove(int expectedCount, int[] values)
{
var list = new DoublyLinkedList <int>();
foreach (var item in values)
{
list.AddNodeToLast(item);
}
Assert.Equal(expectedCount, list.Count);
if (expectedCount > 0)
{
Assert.Equal(list.Head.prev, list.Tail);
Assert.Equal(list.Tail.next, list.Head);
Assert.NotNull(list.Head);
Assert.NotNull(list.Tail);
if (values.Length > 1)
{
list.Remove(1);
Assert.Equal(values[2], list.Head.next.data);
}
Assert.Equal(values[0], list.Head.data);
Assert.Equal(values[values.Length - 1], list.Tail.data);
}
}
static public string CaesarCypherEncrypt(int key, string phrase, string way)
{
var Encryptor = new DoublyLinkedList <char>();
string EncryptedPhrase = "";
char finalLetter = ' ';
for (int i = 0; i < phrase.Length; i++)
{
for (char currentLetter = 'a'; currentLetter <= 'z'; currentLetter++)
{
if (phrase[i] == ' ')
{
Encryptor.AddNodeToLast(' ');
break;
}
else if (phrase[i] == currentLetter)
{
if (way == "encrypt")
{
finalLetter = currentLetter;
for (int j = 0; j < key; j++)
{
finalLetter++;
}
Encryptor.AddNodeToLast(finalLetter);
}
else if (way == "decrypt")
{
finalLetter = currentLetter;
for (int j = 0; j < key; j++)
{
finalLetter--;
}
Encryptor.AddNodeToLast(finalLetter);
}
}
}
}
var runner = Encryptor.Head;
for (int i = 0; i < Encryptor.Count; i++)
{
EncryptedPhrase += runner.data;
runner = runner.next;
}
return(EncryptedPhrase);
}
