Tic-Tac-Toe

The brief

A one day tech test to build the business logic for a game of tic tac toe. It should be easy to implement a working game of tic tac toe by combining the code with any user interface, whether web or command line.

The rules of tic-tac-toe are as follows:

• There are two players in the game (X and O)
• Players take turns until the game is over
• A player can claim a field if it is not already taken
• A turn ends when a player claims a field
• A player wins if they claim all the fields in a row, column or diagonal
• A game is over if a player wins
• A game is over when all fields are taken

Tech

Written in Ruby and tested with RSpec.

How to use

1. git clone https://github.com/BDCraven/tic-tac-toe.git
2. Run the command gem install bundle (if you don't have bundle already)
3. When the installation completes, run bundle
4. Run the tests by typing rspec in the command line.

User interface

To test how easily the code could be combined with a user interface I included a play method which allows a basic version of the game to be run in irb:

2.4.0 :001 > require './lib/tictactoe.rb'
 => true

2.4.0 :002 > game = TicTacToe.new
 => #<TicTacToe:0x007fb24694f6d8
 @board=[" ", " ", " ", " ", " ", " ", " ", " ", " "],
 @player_one="X", @player_two="O", @turn_count=1>

2.4.0 :003 > game.play
Player X: Please enter a number: 1-9
   |   |
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   |   |
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   |   |
1
Player O: Please enter a number: 1-9
 X |   |
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   |   |
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   |   |