private bool ApplyRule(int x, int y)
{
var isAlive = _board.IsAlive(x, y);
var neighboursCount = _board.CountNeighbours(x, y);
return(isAlive ? neighboursCount > 1 && neighboursCount < 4 : neighboursCount == 3);
}
public void CountCellNeighbours()
{
Board b = new Board();
b.AddCell(2, 2);
b.AddCell(3, 2);
Assert.AreEqual(2, b.CountNeighbours(3, 3));
}