I need help writing a unit test for this c# TicTacToeGame code. I need to test the isThereAWinner method. It can test the X's, O's, or draw(CAT game). Thank you!

using System;

namespace TicTacToeGame { public class Board { public const int MAX_ROWS = 3; public const int MAX_COLS = 3; public Square[,] board = new Square[MAX_ROWS, MAX_COLS]; private GameBrain gameBrian;

public Board() { gameBrian = new GameBrain();

for (int row = 0; row

public bool playerMakesMove(int row, int col) { bool isSuccesful = false; if (board[row, col].occupiedBy == "") { board[row, col].occupiedBy = Square.PLAYER_MARKER; isSuccesful = true; } return isSuccesful; }

public bool systemMakesMove() { return gameBrian.systemMove(this); }

public String isThereAWinner() { String winner = ""; winner = calculateWinner(); return winner; }

private String calculateWinner() { // Empty string means nobody has won String winner = ""; if (winnerCheck(Square.PLAYER_MARKER)) winner = Square.PLAYER_MARKER; else if (winnerCheck(Square.SYSETM_MARKER)) winner = Square.SYSETM_MARKER; else if (allTaken()) winner = Square.CAT_MARKER; return winner; }

private bool allTaken() { bool isAllTaken = true; for (int row = 0; row

private bool winnerCheck(String marker) { bool isWinner = false; if (board[0,0].occupiedBy == marker && board[0,1].occupiedBy == marker && board[0,2].occupiedBy == marker) { // 1st row is all of a kind isWinner = true; } else if (board[1, 0].occupiedBy == marker && board[1, 1].occupiedBy == marker && board[1, 2].occupiedBy == marker) { // 2nd row is all of a kind isWinner = true; } else if (board[2, 0].occupiedBy == marker && board[2, 1].occupiedBy == marker && board[2, 2].occupiedBy == marker) { // 3rd row is all of a kind isWinner = true; } else if (board[0, 0].occupiedBy == marker && board[1, 0].occupiedBy == marker && board[2, 0].occupiedBy == marker) { // 1st column is all of a kind isWinner = true; } else if (board[0, 1].occupiedBy == marker && board[1, 1].occupiedBy == marker && board[2, 1].occupiedBy == marker) { // 2nd column is all of a kind isWinner = true; } else if (board[0, 2].occupiedBy == marker && board[1, 2].occupiedBy == marker && board[2, 2].occupiedBy == marker) { // 3rd column is all of a kind isWinner = true; } else if (board[0, 0].occupiedBy == marker && board[1, 1].occupiedBy == marker && board[2, 2].occupiedBy == marker) { // 1st diagonal is all of a kind isWinner = true; } else if (board[0, 2].occupiedBy == marker && board[1, 1].occupiedBy == marker && board[2, 0].occupiedBy == marker) { // 2nd diagonal is all of a kind isWinner = true; } return isWinner; }

public String[,] getBoard() { String[,] pseudoBoard = new String[MAX_ROWS, MAX_COLS]; for (int row = 0; row 1 using System; namespace TicTacToeGame 4. public class Board public const int MAX ROWS = 3; public const int MAX COLS = 3; public square[,] board = new Square(MAX ROWS, MAX COLS]; private GameBrain gameBrian; 9 public Board() 12 13 gameBrian = new GameBrain(); 16 17 for (int row = 0; row