def test_AI_move_empty(self):
"""Test the AI placing a move on an empty board"""
b = Board()
b.spaces = ' '
self.assertIn(_AI_move_random(b), range(9))
def test_AI_move_middle_of_game(self):
"""Test the AI placing a move on a partially-filled board"""
b = Board()
b.spaces = 'XXO X O '
self.assertIn(_AI_move_random(b), [3, 5, 6, 8])
def test_AI_move_full(self):
"""Test the AI trying to move on a full board"""
b = Board()
b.spaces = 'XXOOOXXOX'
self.assertIsNone(_AI_move_random(b))
