public void ACellsNeighbourhoodIsEveryLocationAroundACell()
 {
     Neighbourhood expected = new Neighbourhood();
     expected.AddEmptyCell(0, 1, false);
     expected.AddEmptyCell(1, 1, false);
     expected.AddEmptyCell(1, 0, false);
     expected.AddEmptyCell(1, -1, false);
     expected.AddEmptyCell(0, -1, false);
     expected.AddEmptyCell(-1, -1, false);
     expected.AddEmptyCell(-1, 0, false);
     expected.AddEmptyCell(-1, 1, false);
     Cell cell = new Cell(0, 0, true);
     Assert.AreEqual(expected.ToString(), cell.neighbourhood.ToString());
 }