public void PuzzleExample_FindFirstInvalid()
{
const int preambleLength = 5;
var system = new XmasSystem(PuzzleExample);
system.FindFirstInvalid(preambleLength).Should().Be(127);
}
public void Puzzle1_FindFirstInvalid()
{
const int preambleLength = 25;
var system = new XmasSystem(Input.Day09);
system.FindFirstInvalid(preambleLength).Should().Be(138879426L);
}