public void ApplyValidSingleStepSolutionTest()
{
var sudoku = (int[, ])_sudoku.Clone();
sudoku[4, 7] = 0;
var sudokuPuzzle = new SudokuPuzzle(sudoku);
var strategyWhichFindsNothing = new NakedTriple();
var strategyWhichReducesCandidates = new BasicElimination();
var strategyWhichFindsResult = new HiddenSingle();
sudokuPuzzle.ApplySingleStepSolution(strategyWhichFindsNothing.SolveSingleStep(sudokuPuzzle));
Assert.That(sudokuPuzzle.Steps, Is.Empty);
Assert.That(sudokuPuzzle.NumberOfSteps, Is.Zero);
sudokuPuzzle.ApplySingleStepSolution(strategyWhichReducesCandidates.SolveSingleStep(sudokuPuzzle));
Assert.That(sudokuPuzzle.Steps.Count, Is.EqualTo(1));
Assert.That(sudokuPuzzle.NumberOfSteps, Is.EqualTo(1));
Assert.That(sudokuPuzzle.Steps.Last().Strategy, Is.EqualTo(strategyWhichReducesCandidates.StrategyName));
Assert.That(sudokuPuzzle.Steps.Last().SolutionDescription, Is.Not.Empty);
sudokuPuzzle.ApplySingleStepSolution(strategyWhichFindsResult.SolveSingleStep(sudokuPuzzle));
Assert.That(sudokuPuzzle.Steps.Count, Is.EqualTo(2));
Assert.That(sudokuPuzzle.NumberOfSteps, Is.EqualTo(2));
Assert.That(sudokuPuzzle.Steps.Last().Strategy, Is.EqualTo(strategyWhichFindsResult.StrategyName));
Assert.That(sudokuPuzzle.Cells[4, 7].Value, Is.EqualTo(5));
Assert.That(sudokuPuzzle.Steps.Last().SolutionDescription, Is.Not.Empty);
}
public HiddenSingleDisplayer(DomainFacade displayer, HiddenSingle hiddenSingle)
: base(displayer, hiddenSingle, "hidden-single")
{
_position = hiddenSingle.Position;
_value = hiddenSingle.Value;
_house = hiddenSingle.House;
_explanationSteps.AddRange(new Action[] { Explain1, Explain2, Explain3 });
}
public void UndoSingleStepSolutionsWhichReturnsResult_UndoesResult_Test()
{
var sudoku = (int[, ])_sudoku.Clone();
sudoku[4, 7] = 0;
var sudokuPuzzle = new SudokuPuzzle(sudoku);
var strategyWhichFindsResult = new HiddenSingle();
sudokuPuzzle.ApplySingleStepSolution(strategyWhichFindsResult.SolveSingleStep(sudokuPuzzle));
Assert.That(sudokuPuzzle.Cells[4, 7].Value, Is.EqualTo(5));
var step = sudokuPuzzle.UndoLastSingleStepSolution();
Assert.That(step.Eliminations, Is.Null);
Assert.That(step.Result, Is.Not.Null);
Assert.That(step.Result.IndexOfRow, Is.EqualTo(4));
Assert.That(step.Result.IndexOfColumn, Is.EqualTo(7));
Assert.That(step.Strategy, Is.EqualTo(strategyWhichFindsResult.StrategyName));
Assert.That(step.SolutionDescription, Is.Not.Empty);
Assert.That(sudokuPuzzle.Cells[4, 7].Value, Is.EqualTo(0));
}
