"""A lightweight test suite for games.py"""

# You can run this test suite by doing: py.test tests/test_games.py

# Of course you need to have py.test installed to do this.

import pytest

from games import * # noqa

# Creating the game instances

f52 = Fig52Game()

ttt = TicTacToe()

def gen_state(to_move='X', x_positions=[], o_positions=[], h=3, v=3, k=3):

"""Given whose turn it is to move, the positions of X's on the board, the

positions of O's on the board, and, (optionally) number of rows, columns

and how many consecutive X's or O's required to win, return the corresponding

game state"""

moves = set([(x, y) for x in range(1, h + 1) for y in range(1, v + 1)]) \

- set(x_positions) - set(o_positions)

moves = list(moves)

board = {}

for pos in x_positions:

board[pos] = 'X'

for pos in o_positions:

board[pos] = 'O'

return GameState(to_move=to_move, utility=0, board=board, moves=moves)

def test_minimax_decision():

assert minimax_decision('A', f52) == 'a1'

assert minimax_decision('B', f52) == 'b1'

assert minimax_decision('C', f52) == 'c1'

assert minimax_decision('D', f52) == 'd3'

def test_alphabeta_full_search():

assert alphabeta_full_search('A', f52) == 'a1'

assert alphabeta_full_search('B', f52) == 'b1'

assert alphabeta_full_search('C', f52) == 'c1'

assert alphabeta_full_search('D', f52) == 'd3'

state = gen_state(to_move='X', x_positions=[(1, 1), (3, 3)],

o_positions=[(1, 2), (3, 2)])

assert alphabeta_full_search(state, ttt) == (2, 2)

state = gen_state(to_move='O', x_positions=[(1, 1), (3, 1), (3, 3)],

o_positions=[(1, 2), (3, 2)])

assert alphabeta_full_search(state, ttt) == (2, 2)

state = gen_state(to_move='O', x_positions=[(1, 1)],

o_positions=[])

assert alphabeta_full_search(state, ttt) == (2, 2)

state = gen_state(to_move='X', x_positions=[(1, 1), (3, 1)],

o_positions=[(2, 2), (3, 1)])

assert alphabeta_full_search(state, ttt) == (1, 3)

def test_random_tests():

assert Fig52Game().play_game(alphabeta_player, alphabeta_player) == 3

# The player 'X' (one who plays first) in TicTacToe never loses:

assert ttt.play_game(alphabeta_player, alphabeta_player) >= 0

# The player 'X' (one who plays first) in TicTacToe never loses:

assert ttt.play_game(alphabeta_player, random_player) >= 0

if __name__ == '__main__':

pytest.main()