public void GivenCleanExtraProbabilityOf1_Suck_ShouldCleanAdjacentSquare()
{
// arrange
_state.SetAllSquaresDirty();
_state.VacuumPos = new Point2D(1, 1);
const double cleanExtraProbability = 1.0;
_handler = new ErraticSuckActionHandler(_decoratedHandler, cleanExtraProbability);
// act
_handler.DoAction(_state, VacuumWorldAction.Suck);
// assert
var numDirtyNeighbours = _state.AdjacentSquares(_state.VacuumPos).Count(s => _state.SquareIsDirty(s));
Assert.AreEqual(3, numDirtyNeighbours);
}
private static IEnumerable <VacuumWorldState> CreateAllStatesWithOneCleanedNeighbour(VacuumWorldState state)
{
return(state
.AdjacentSquares(state.VacuumPos)
.Select(square =>
{
var neighbourState = state.Clone();
neighbourState.CleanSquare(square);
return neighbourState;
}));
}
private void CleanRandomDirtyNeighbour(VacuumWorldState state)
{
var adj = state.AdjacentSquares(state.VacuumPos).Where(state.SquareIsDirty).ToList();
if (adj.Count == 0)
{
return;
}
var squareToClean = _random.Choice(adj);
state.CleanSquare(squareToClean);
}