TicTacToe

Tic Tac Toe

Rules

The rules of the tic tac toe game are the following:

• a game is over when all fields are taken
• a game is over when all fields in a column are taken by a player
• a game is over when all fields in a row are taken by a player
• a game is over when all fields in a diagonal are taken by a player
• a player can take a field if not already taken
• players take turns taking fields until the game is over
• there are two player in the game (X and O)

Suggested Test Cases

Given this game board

+---+---+---+
| 1 | 2 | 3 |
+---+---+---+
| 4 | 5 | 6 |
+---+---+---+
| 7 | 8 | 9 |
+---+---+---+

And it's the turn of player X
When it play on cell 5
Then the board is now 

+---+---+---+
| 1 | 2 | 3 |
+---+---+---+
| 4 | X | 6 |
+---+---+---+
| 7 | 8 | 9 |
+---+---+---+

And it's not the end of game.