/// <summary>
/// RowDelta
/// The change in Row (plus or minus) from one letter to the next
/// given the direction of the word in the grid
/// </summary>
/// <param name="direction"></param>
/// <returns></returns>
public static int RowDelta(this DirectionFlagsEnum direction)
{
if ((direction & DirectionFlagsEnum.Up) != 0)
{
return(-1);
}
else if ((direction & DirectionFlagsEnum.Down) != 0)
{
return(1);
}
return(0);
}
/// <summary>
/// ColumnDelta
/// The change in Column (plus or minus) from one letter to the next
/// given the direction of the word in the grid
/// </summary>
/// <param name="direction"></param>
/// <returns></returns>
public static int ColumnDelta(this DirectionFlagsEnum direction)
{
if ((direction & DirectionFlagsEnum.Left) != 0)
{
return(-1);
}
else if ((direction & DirectionFlagsEnum.Right) != 0)
{
return(1);
}
return(0);
}
public void IsPlacementValid_WordCrossesAnotherWord_Various(char[,] grid,
int row,
int column,
string word,
DirectionFlagsEnum direction,
bool expectedResult)
{
var hiddenWord = new HiddenWord()
{
Start = new GridLocation(row, column),
Word = word,
Direction = direction
};
var result = PlacementValidator.IsWordPlacementValid(grid, hiddenWord);
Assert.Equal(result, expectedResult);
}
[InlineData(20, 1, "abcdefghijklmnopqrst", DirectionFlagsEnum.UpRight, true)] // Max size word fits in DownRight
public void IsPlacementValid_MaxWordSize_Various(int row,
int column,
string word,
DirectionFlagsEnum direction,
bool expectedResult)
{
var grid = new char[20, 20];
var hiddenWord = new HiddenWord()
{
Start = new GridLocation(row, column),
Word = word,
Direction = direction
};
var result = PlacementValidator.IsWordPlacementValid(grid, hiddenWord);
Assert.Equal(result, expectedResult);
}
/// <summary>
/// GetNextLetterGridLocation
/// Return GridLocation where next character will be placed
/// </summary>
/// <param name="gridLocation"></param>
/// <param name="direction"></param>
/// <returns></returns>
public static GridLocation GetNextLetterGridLocation(GridLocation gridLocation, DirectionFlagsEnum direction)
{
var newRow = gridLocation.Row + direction.RowDelta();
var newColumn = gridLocation.Column + direction.ColumnDelta();
return(new GridLocation(newRow, newColumn));
}