public void SettingCellStateIsIdempotent()
{
var aPosition = new Mock<IPosition>();
var universe = new StateHolder();
universe.SetState(aPosition.Object, new Alive());
Assert.Equal(new Alive(), universe.GetState(aPosition.Object));
universe.SetState(aPosition.Object, new Alive());
Assert.Equal(new Alive(), universe.GetState(aPosition.Object));
}
public void TheUniverseHoldsCellStates()
{
var aPosition = new Mock<IPosition>();
var anotherPosition = new Mock<IPosition>();
var universe = new StateHolder();
universe.SetState(aPosition.Object, new Alive());
universe.SetState(anotherPosition.Object, new Dead());
Assert.Equal(new Alive(), universe.GetState(aPosition.Object));
Assert.Equal(new Dead(), universe.GetState(anotherPosition.Object));
}
public void AStateNotSetMeansDead()
{
var aPosition = new Mock<IPosition>();
var universe = new StateHolder();
Assert.Equal(new Dead(), universe.GetState(aPosition.Object));
}
public void FourAliveCellsStayAlive()
{
var p00 = new CartesianPosition(0, 0);
var p01 = new CartesianPosition(0, 1);
var p11 = new CartesianPosition(1, 1);
var p10 = new CartesianPosition(1, 0);
var stateHolder = new StateHolder();
stateHolder.SetState(p00, new Alive());
stateHolder.SetState(p01, new Alive());
stateHolder.SetState(p11, new Alive());
stateHolder.SetState(p10, new Alive());
var engine = new Engine<CartesianPosition>(stateHolder, new CartesianSpaceLimits());
var secondGeneration = engine.NextGeneration();
Assert.Equal(new Alive(), stateHolder.GetState(p00));
Assert.Equal(new Alive(), stateHolder.GetState(p01));
Assert.Equal(new Alive(), stateHolder.GetState(p11));
Assert.Equal(new Alive(), stateHolder.GetState(p10));
}