def test_is_winner_no_end():
tiles = []
for _ in range(9):
tiles.append(Tile())
board = Board(tiles)
board.tiles()[0].set_collapsed('x1')
assert board.is_winner() == (None, [])
def test_is_winner_one_option():
tiles = []
for _ in range(9):
tiles.append(Tile())
board = Board(tiles)
board.tiles()[0].set_collapsed('x1')
board.tiles()[1].set_collapsed('x3')
board.tiles()[2].set_collapsed('x5')
assert board.is_winner() == ('x', [0, 1, 2])
def test_is_winner_more_options():
tiles = []
for _ in range(9):
tiles.append(Tile())
board = Board(tiles)
board.tiles()[0].set_collapsed('x7')
board.tiles()[1].set_collapsed('x3')
board.tiles()[2].set_collapsed('x5')
board.tiles()[3].set_collapsed('y2')
board.tiles()[4].set_collapsed('y4')
board.tiles()[5].set_collapsed('y6')
assert board.is_winner() == ('y', [3, 4, 5])
