public void TheSetOfDeadCellsMustBeUnique()
{
var adjacentDeadCell = new FakeCellLocation();
var liveCell1 = new FakeCellLocation(adjacentDeadCell);
var liveCell2 = new FakeCellLocation(adjacentDeadCell);
var universe = new Universe(new[] { liveCell1, liveCell2 });
Assert.That(universe.DeadCellLocations, Is.Unique);
}
public void TheSetOfDeadCellsCannotContainLiveCells()
{
var liveCell1 = new FakeCellLocation(fakeNeighbours: new ICellLocation[0]);
var liveCell2 = new FakeCellLocation(liveCell1);
var universe = new Universe(new[] { liveCell1, liveCell2 });
Assert.That(universe.DeadCellLocations, Has.No.Member(liveCell1));
Assert.That(universe.DeadCellLocations, Has.No.Member(liveCell2));
}
public void GivenAUniverseWithOneLiveCellAndLessThanTwoLiveNeighbours_WhenEvolved_TheCellDies(int liveNeighbourCount)
{
var liveNeighbours = CreateCells(liveNeighbourCount);
var liveCell = new FakeCellLocation(liveNeighbours);
var allLiveCells = liveNeighbours.Concat(new[] { liveCell });
var initialUniverse = new Universe(allLiveCells);
var evolvedUniverse = EvolveUniverse(initialUniverse);
Assert.That(evolvedUniverse.LiveCellLocations, Has.No.Member(liveCell));
}
public void GivenAUniverseWithALiveCellWithBetweenTwoAndThreeLiveNeighbours_WhenEvolved_TheCellIsStillAlive(int liveNeighbourCount)
{
var liveNeighbours = CreateCells(liveNeighbourCount);
var liveCell = new FakeCellLocation(liveNeighbours);
var allLiveCells = liveNeighbours.Concat(new[] { liveCell });
var initialUniverse = new Universe(allLiveCells);
var evolvedUniverse = EvolveUniverse(initialUniverse);
Assert.That(evolvedUniverse.LiveCellLocations, Contains.Item(liveCell));
}
public void GivenAUniverseWithADeadCellWithThreeLiveNeighbours_WhenEvolved_TheCellComesAlive()
{
var deadCell = new FakeCellLocation();
var liveCell1 = new FakeCellLocation(deadCell);
var liveCell2 = new FakeCellLocation(deadCell);
var liveCell3 = new FakeCellLocation(deadCell);
deadCell.SetFakeNeighbours(new[] { liveCell1, liveCell2, liveCell3 });
var initialUniverse = new Universe(new[] { liveCell1, liveCell2, liveCell3 });
var evolvedUniverse = EvolveUniverse(initialUniverse);
Assert.That(evolvedUniverse.LiveCellLocations, Has.Member(deadCell));
}
public void DeadCellsAreTheSetOfAllDeadCellsNeighbouringAnyLiveCells()
{
var adjacentDeadCell1 = new FakeCellLocation();
var adjacentDeadCell2 = new FakeCellLocation();
var liveCell1 = new FakeCellLocation(adjacentDeadCell1, adjacentDeadCell2);
var adjacentDeadCell3 = new FakeCellLocation();
var adjacentDeadCell4 = new FakeCellLocation();
var liveCell2 = new FakeCellLocation(adjacentDeadCell3, adjacentDeadCell4);
var universe = new Universe(new[] { liveCell1, liveCell2 });
Assert.That(universe.DeadCellLocations,
Is.SubsetOf(new[] { adjacentDeadCell1, adjacentDeadCell2, adjacentDeadCell3, adjacentDeadCell4 }));
}