public void ParseInstruction_AdvancedRotate()
{
//rotate based on position of letter X
//abcde -> abcde deabc, rotates 1 plus value of index (2)
//abcde -> eabcd -> deabc -> cdeab
_day21.Password = "******";
var instruction = "rotate based on position of letter c";
var result = _day21.AdvancedRotate(instruction);
Assert.AreEqual(result, "cdeab");
}