public void MoverAvailableNeighboursTest()
{
var visited = new HashSet <(int, int)> {
(0, 0), (1, 1), (2, 1), (2, 2)
};
var availableNeighbours = Mover.AvailableNeighbours(visited, 2, 2, 3, 3);
Assert.AreEqual(1, availableNeighbours.Count);
}