public void PlayDisc()
{
var expectedFirstLocation = new Location(GameBoard.MaxRow, 1);
var result = board.PlayDisc(Disc.Red, 1);
Assert.AreEqual(expectedFirstLocation, board.LastLocationPlayed);
var expectedSecondLocation = new Location(GameBoard.MaxRow - 1, 1);
board.PlayDisc(Disc.Black, 1);
Assert.AreEqual(expectedSecondLocation, board.LastLocationPlayed);
Assert.IsTrue(result);
}
public bool PlayDisc(Disc disc, int column)
{
if (column > MaxColumn || column < 1) throw new ArgumentException(String.Format("Column must be between 1 and {0}", MaxColumn));
int row = MaxRow;
while (row > 0 && board[new Location(row, column)] != Disc.Empty) {
row--;
}
if (row > 0) {
board[new Location(row, column)] = disc;
lastLocationPlayed = new Location(row, column);
return true;
}
return false;
}
public static bool Exists(Location location)
{
return location.Row > 0 && location.Row <= MaxRow &&
location.Column > 0 && location.Column <= MaxColumn;
}
bool VerticalWins(Location location, Disc disc)
{
var contiguousDiscs = 0;
var row = location.Row + 1;
//check down.
while (row <= MaxRow) {
var loc = new Location(row, location.Column);
if (board[loc] == disc) {
contiguousDiscs++;
row++;
}
else {
break;
}
}
return contiguousDiscs >= 3;
}
bool NortWestSouthEastDiagonalWins(Location lastLocationPlayed, Disc disc)
{
var contiguousDiscs = 0;
var row = lastLocationPlayed.Row - 1;
var column = lastLocationPlayed.Column - 1;
//check north west.
while (row >= 1 && column >= 1) {
var loc = new Location(row, column);
if (board[loc] == disc) {
contiguousDiscs++;
column--;
row--;
}
else {
break;
}
}
row = lastLocationPlayed.Row + 1;
column = lastLocationPlayed.Column + 1;
//check south east
while (row <= MaxRow && column <= MaxColumn) {
var loc = new Location(row, column);
if (board[loc] == disc) {
contiguousDiscs++;
column++;
row++;
}
else {
break;
}
}
return contiguousDiscs >= 3;
}
bool HorizontalWins(Location location, Disc disc)
{
var contiguousDiscs = 0;
var column = location.Column + 1;
//check right.
while (column <= MaxColumn) {
var loc = new Location(location.Row, column);
if (board[loc] == disc) {
contiguousDiscs++;
column++;
}
else {
break;
}
}
//check left.
column = location.Column - 1;
while (column >= 1) {
var loc = new Location(location.Row, column);
if (board[loc] == disc) {
contiguousDiscs++;
column--;
}
else {
break;
}
}
return contiguousDiscs >= 3;
}