public void Neighbors_GivenLocationWithEightCellsBordering_ReturnsEight()
{
// arrange
for (int x = 0; x < 3; ++x)
{
for (int y = 0; y < 3; ++y)
{
universe.Add(x, y);
}
}
// act
int neighbors = universe.CountLivingNeighbors(1, 1);
// assert
Assert.AreEqual(
expected: 8,
actual: neighbors,
message: "The cell did not have exactly 8 neighbors.");
}