public void Revert_RevertsSpecifiedDiagonal()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null, null, 4 },
{ null, null, 3, 2 },
{ 2, null, null, null },
{ null, null, null, null }
});
var rule = new DiagonalUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size));
BitVector[,] initialPossibles = _GetPossibleValues(puzzle.Size, rule);
var updatedCoordTracker = new CoordinateTracker(puzzle.Size);
var coord = new Coordinate(2, 2);
int val = 4;
rule.Update(in coord, val, updatedCoordTracker);
var revertedCoordTracker = new CoordinateTracker(puzzle.Size);
rule.Revert(coord, val, revertedCoordTracker);
Assert.Equal(
revertedCoordTracker.GetTrackedCoords().ToArray(),
updatedCoordTracker.GetTrackedCoords().ToArray());
for (int row = 0; row < puzzle.Size; row++)
{
for (int col = 0; col < puzzle.Size; col++)
{
Assert.Equal(
initialPossibles[row, col],
rule.GetPossibleValues(new Coordinate(row, col)));
}
}
}
public void Constructor_FiltersCorrectly()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null, null, 4 },
{ null, null, 3, 2 },
{ 2, null, null, null },
{ null, null, null, null }
});
var rule = new DiagonalUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size));
var expectedBackwardPossibles = new BitVector(0b11100);
var expectedForwardPossibles = new BitVector(0b00110);
var expectedOtherPossibles = new BitVector(0b11110);
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(0, 0)));
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(1, 1)));
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(2, 2)));
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(3, 3)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(0, 3)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(1, 2)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(2, 1)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(3, 0)));
Assert.Equal(expectedOtherPossibles,
rule.GetPossibleValues(new Coordinate(0, 2)));
Assert.Equal(expectedOtherPossibles,
rule.GetPossibleValues(new Coordinate(1, 3)));
}
public void Revert_OnNonDiagonal_DoesNothing()
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null, null, 4 },
{ null, null, 3, 2 },
{ 2, null, null, null },
{ null, null, null, null }
});
var rule = new DiagonalUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size));
BitVector[,] previousPossibles = _GetPossibleValues(puzzle.Size, rule);
var coordTracker = new CoordinateTracker(puzzle.Size);
var coord = new Coordinate(0, 1);
int val = 2;
rule.Update(in coord, val, new CoordinateTracker(puzzle.Size));
rule.Revert(coord, val, coordTracker);
Assert.Equal(0, coordTracker.NumTracked);
for (int row = 0; row < puzzle.Size; row++)
{
for (int col = 0; col < puzzle.Size; col++)
{
Assert.Equal(
previousPossibles[row, col],
rule.GetPossibleValues(new Coordinate(row, col)));
}
}
}
public void Revert_WithoutAffectedCoordsList_RevertsSpecifiedDiagonal()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null, null, 4 },
new int?[] { null, null, 3, 2 },
new int?[] { 2, null, null, null },
new int?[] { null, null, null, null }
});
var rule = new DiagonalUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
BitVector[,] initialPossibles = _GetPossibleValues(puzzle.Size, rule);
var coord = new Coordinate(2, 1);
int val = 1;
rule.Update(in coord, val, new CoordinateTracker(puzzle.Size));
rule.Revert(coord, val);
for (int row = 0; row < puzzle.Size; row++)
{
for (int col = 0; col < puzzle.Size; col++)
{
Assert.Equal(
initialPossibles[row, col],
rule.GetPossibleValues(new Coordinate(row, col)));
}
}
}
public void Update_OnDiagonal_UpdatesSpecifiedDiagonal()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null, null, 4 },
new int?[] { null, null, 3, 2 },
new int?[] { 2, null, null, null },
new int?[] { null, null, null, null }
});
var rule = new DiagonalUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
var coordTracker = new CoordinateTracker(puzzle.Size);
var coord = new Coordinate(2, 2);
int val = 4;
rule.Update(coord, val, coordTracker);
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(1, 1), new Coordinate(3, 3)
},
new HashSet <Coordinate>(coordTracker.TrackedCoords.ToArray()));
Assert.Equal(new BitVector(0b01100), rule.GetPossibleValues(new Coordinate(1, 1)));
Assert.Equal(new BitVector(0b00110), rule.GetPossibleValues(new Coordinate(1, 2)));
Assert.Equal(new BitVector(0b11110), rule.GetPossibleValues(new Coordinate(0, 2)));
}
public void TrySolve_MegaPuzzle_Solves()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { null, null, null, null, 10, 1, null, 8, null, 15, 3, 11, null, 2, 16, null },
new int?[] { 14, null, 2, null, null, 4, 3, null, null, 13, 8, null, null, 12, null, null },
new int?[] { null, null, null, 12, null, null, null, 15, null, null, null, 7, null, null, 9, 10 },
new int?[] { 1, 10, 15, null, 6, null, null, null, null, 14, null, null, null, null, null, 11 },
new int?[] { null, 11, 14, 6, null, null, null, 9, 13, 8, null, null, null, null, 2, 3 },
new int?[] { 12, null, null, null, 4, null, 7, 3, 11, 6, null, null, 16, null, 5, null },
new int?[] { 13, 16, null, 2, null, null, null, 1, null, null, 5, null, 10, 9, null, null },
new int?[] { null, 4, null, null, 13, null, 2, null, null, null, 16, 3, 11, null, null, null },
new int?[] { null, null, null, 10, 3, 6, null, null, null, 9, null, 12, null, null, 4, null },
new int?[] { null, null, 12, 15, null, 9, null, null, 7, null, null, null, 1, null, 3, 14 },
new int?[] { null, 1, null, 4, null, null, 5, 12, 3, 10, null, 8, null, null, null, 2 },
new int?[] { 3, 6, null, null, null, null, 15, 10, 4, null, null, null, 12, 5, 7, null },
new int?[] { 2, null, null, null, null, null, 4, null, null, null, null, 15, null, 16, 11, 9 },
new int?[] { 4, 14, null, null, 16, null, null, null, 2, null, null, null, 6, null, null, null },
new int?[] { null, null, 16, null, null, 7, 8, null, null, 4, 10, null, null, 14, null, 5 },
new int?[] { null, 3, 6, null, 9, 12, 14, null, 8, null, 13, 16, null, null, null, null }
});
var rowRule = new RowUniquenessRule();
var columnRule = new ColumnUniquenessRule();
var boxRule = new BoxUniquenessRule();
var diagonalRule = new DiagonalUniquenessRule();
var ruleKeeper = new DynamicRuleKeeper(
new IRule[] { rowRule, columnRule, boxRule, diagonalRule });
var heuristic = new StandardHeuristic(
rowRule, columnRule, boxRule);
var solver = new PuzzleSolver <PuzzleWithPossibleValues>(ruleKeeper, heuristic);
Assert.True(solver.TrySolve(puzzle));
_AssertMegaPuzzleSolved(puzzle);
}
public void Constructor_AcceptsValidPuzzleSizes(int size)
{
int?[,] matrix = new int?[size, size];
var puzzle = new Puzzle(matrix);
var rule = new DiagonalUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size));
Assert.NotNull(rule);
}
public void TryInit_WithDuplicateValueInDiagonal_Fails()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null, null, 4 },
new int?[] { null, 1, 3, 2 },
new int?[] { 2, null, null, null },
new int?[] { null, null, null, null }
});
var rule = new DiagonalUniquenessRule();
Assert.False(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
}
private BitVector[,] _GetPossibleValues(int puzzleSize, DiagonalUniquenessRule rule)
{
var possibleValues = new BitVector[puzzleSize, puzzleSize];
for (int row = 0; row < puzzleSize; row++)
{
for (int col = 0; col < puzzleSize; col++)
{
possibleValues[row, col] =
rule.GetPossibleValues(new Coordinate(row, col));
}
}
return(possibleValues);
}
public void Constructor_WithDuplicateValueInDiagonal_Throws()
{
ArgumentException ex = Assert.Throws <ArgumentException>(() =>
{
var puzzle = new Puzzle(new int?[, ] {
{ 1, null, null, 4 },
{ null, 1, 3, 2 },
{ 2, null, null, null },
{ null, null, null, null }
});
var rule = new DiagonalUniquenessRule(puzzle, _GetAllPossibleValues(puzzle.Size));
});
Assert.Contains("Puzzle does not satisfy diagonal uniqueness rule", ex.Message);
}
public void CopyWithNewReference_CreatesDeepCopy()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null, null, 4 },
new int?[] { null, null, 3, 2 },
new int?[] { 4, null, null, null },
new int?[] { null, null, null, null }
});
var rule = new DiagonalUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
var puzzleCopy = new PuzzleWithPossibleValues(puzzle);
IRule ruleCopy = rule.CopyWithNewReference(puzzleCopy);
int val = 4;
var coord = new Coordinate(1, 1);
ruleCopy.Update(coord, val, new CoordinateTracker(puzzle.Size));
Assert.NotEqual(rule.GetPossibleValues(coord), ruleCopy.GetPossibleValues(coord));
puzzleCopy[coord] = val;
var secondCoord = new Coordinate(2, 2);
int secondVal = 2;
var coordTracker = new CoordinateTracker(puzzle.Size);
ruleCopy.Update(secondCoord, secondVal, coordTracker);
var originalCoordTracker = new CoordinateTracker(puzzle.Size);
rule.Update(secondCoord, secondVal, originalCoordTracker);
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(3, 3)
},
new HashSet <Coordinate>(coordTracker.TrackedCoords.ToArray()));
Assert.Equal(
new HashSet <Coordinate> {
new Coordinate(1, 1), new Coordinate(3, 3)
},
new HashSet <Coordinate>(originalCoordTracker.TrackedCoords.ToArray()));
}
public void Solve_MegaPuzzle_Solves()
{
var puzzle = new Puzzle(new int?[, ] {
{ null, null, null, null, 10, 1, null, 8, null, 15, 3, 11, null, 2, 16, null },
{ 14, null, 2, null, null, 4, 3, null, null, 13, 8, null, null, 12, null, null },
{ null, null, null, 12, null, null, null, 15, null, null, null, 7, null, null, 9, 10 },
{ 1, 10, 15, null, 6, null, null, null, null, 14, null, null, null, null, null, 11 },
{ null, 11, 14, 6, null, null, null, 9, 13, 8, null, null, null, null, 2, 3 },
{ 12, null, null, null, 4, null, 7, 3, 11, 6, null, null, 16, null, 5, null },
{ 13, 16, null, 2, null, null, null, 1, null, null, 5, null, 10, 9, null, null },
{ null, 4, null, null, 13, null, 2, null, null, null, 16, 3, 11, null, null, null },
{ null, null, null, 10, 3, 6, null, null, null, 9, null, 12, null, null, 4, null },
{ null, null, 12, 15, null, 9, null, null, 7, null, null, null, 1, null, 3, 14 },
{ null, 1, null, 4, null, null, 5, 12, 3, 10, null, 8, null, null, null, 2 },
{ 3, 6, null, null, null, null, 15, 10, 4, null, null, null, 12, 5, 7, null },
{ 2, null, null, null, null, null, 4, null, null, null, null, 15, null, 16, 11, 9 },
{ 4, 14, null, null, 16, null, null, null, 2, null, null, null, 6, null, null, null },
{ null, null, 16, null, null, 7, 8, null, null, 4, 10, null, null, 14, null, 5 },
{ null, 3, 6, null, 9, 12, 14, null, 8, null, 13, 16, null, null, null, null }
});
var possibleValues = new PossibleValues(puzzle);
var rowRule = new RowUniquenessRule(puzzle, possibleValues.AllPossible);
var columnRule = new ColumnUniquenessRule(puzzle, possibleValues.AllPossible);
var boxRule = new BoxUniquenessRule(puzzle, possibleValues.AllPossible, true);
var diagonalRule = new DiagonalUniquenessRule(puzzle, possibleValues.AllPossible);
var ruleKeeper = new DynamicRuleKeeper(
puzzle, possibleValues,
new List <ISudokuRule> {
rowRule, columnRule, boxRule, diagonalRule
});
var heuristic = new StandardHeuristic(
puzzle, possibleValues, rowRule, columnRule, boxRule);
var solver = new PuzzleSolver(puzzle, possibleValues, ruleKeeper, heuristic);
solver.Solve();
_AssertMegaPuzzleSolved(puzzle);
}
public void TryInit_ValidPuzzle_FiltersCorrectly()
{
var puzzle = new PuzzleWithPossibleValues(new int?[][] {
new int?[] { 1, null, null, 4 },
new int?[] { null, null, 3, 2 },
new int?[] { 2, null, null, null },
new int?[] { null, null, null, null }
});
var rule = new DiagonalUniquenessRule();
Assert.True(rule.TryInit(puzzle, puzzle.UniquePossibleValues));
var expectedBackwardPossibles = new BitVector(0b11100);
var expectedForwardPossibles = new BitVector(0b00110);
var expectedOtherPossibles = new BitVector(0b11110);
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(0, 0)));
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(1, 1)));
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(2, 2)));
Assert.Equal(expectedBackwardPossibles,
rule.GetPossibleValues(new Coordinate(3, 3)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(0, 3)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(1, 2)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(2, 1)));
Assert.Equal(expectedForwardPossibles,
rule.GetPossibleValues(new Coordinate(3, 0)));
Assert.Equal(expectedOtherPossibles,
rule.GetPossibleValues(new Coordinate(0, 2)));
Assert.Equal(expectedOtherPossibles,
rule.GetPossibleValues(new Coordinate(1, 3)));
}
