public bool ApplyRule(ref Board board)
{
bool ruleSucceeded = false;
for (int squareNumber = 0; squareNumber < 9; squareNumber++)
{
CellData cellData = board.GetCellDataForSquare(squareNumber);
foreach (int unsolvedValue in cellData.GetUnsolvedValues())
{
List <int> cellIndicesWithUnsolvedValue = cellData.GetCellIndicesWithValue(unsolvedValue);
if (InSameRow(cellIndicesWithUnsolvedValue))
{
CellData allCellsInRow = board.GetCellDataForRow(GridMath.GetRowForIndex(cellIndicesWithUnsolvedValue.First()));
bool removalSucceeded = RemoveUnsolvedValueFromCellsNotInSquare(ref board, unsolvedValue, squareNumber, allCellsInRow);
ruleSucceeded |= removalSucceeded;
}
else if (InSameColumn(cellIndicesWithUnsolvedValue))
{
CellData allCellsInColumn = board.GetCellDataForColumn(GridMath.GetColumnForIndex(cellIndicesWithUnsolvedValue.First()));
bool removalSucceeded = RemoveUnsolvedValueFromCellsNotInSquare(ref board, unsolvedValue, squareNumber, allCellsInColumn);
ruleSucceeded |= removalSucceeded;
}
}
}
return(ruleSucceeded);
}
public void MoveDown()
{
if (GridMath.GetRowForIndex(selectedCell) < 8)
{
SetSelectedIndex(selectedCell + 9);
}
}
public void MoveUp()
{
if (GridMath.GetRowForIndex(selectedCell) > 0)
{
SetSelectedIndex(selectedCell - 9);
}
}
private bool InSameRow(List <int> cellIndicesWithValue)
{
return(cellIndicesWithValue.Select(x => GridMath.GetRowForIndex(x)).Distinct().Count() == 1);
}
public void TestRowForIndex(int index, int expectedRow)
{
GridMath.GetRowForIndex(index).Should().Be(expectedRow);
}