def test_check_lines(self):
win_state = "XXX------"
win_dict = Board._decompose_board(win_state)
no_win_state = "XOX------"
no_win_dict = Board._decompose_board(no_win_state)
assert Board._check_lines(win_dict) is not None
assert Board._check_lines(no_win_dict) is None
