def test_pair_hands(self):
state = GameState()
card_piles = [[[Card("2", "s")], [Card("K", "d")], [Card("K", "s")]],
[[Card("3", "c")], [Card("A", "s")], [Card("6", "c")]],
[[Card("3", "s")], [Card("A", "c")], [Card("K", "c")]]]
state.start_new_game(lucky_card=Card("7", "h"), card_piles=card_piles)
pair_hands = state._get_pair_hands()
assert len(pair_hands) == 4
assert set([(0, 1), (2, 2)]) in pair_hands
assert set([(0, 2), (2, 2)]) in pair_hands
assert set([(1, 0), (2, 0)]) in pair_hands
assert set([(1, 1), (2, 1)]) in pair_hands
# this isn't a valid hand (the cards are on the same row)
assert set([(0, 1), (0, 2)]) not in pair_hands
