public void NumLiveNeighborsTest()
{
World world = new World();
world.AddCell(0, 0);
world.AddCell(0, 1);
world.AddCell(2, 3);
world.AddCell(-1, -1);
Assert.AreEqual(1, world.NumLiveNeighbors(0, 1));
Assert.AreEqual(2, world.NumLiveNeighbors(0, 0));
}