def test_hand_must_have_two_cards():
available_cards = [Card("H", "2"), Card("H", "3"), Card("H", "4")]
for i in [0, 1, 3]:
with pytest.raises(ValueError) as exception:
simulator.probability_of_winning(available_cards[:i], 3, [
Card("H", "T"),
Card("H", "A"),
Card("D", "5"),
Card("C", "J"),
Card("C", "9")
])
assert "hand" in str(exception)
def test_table_must_have_the_right_number_of_cards():
available_cards = [
Card("H", "T"),
Card("H", "A"),
Card("D", "5"),
Card("C", "J"),
Card("C", "9"),
Card("D", "T")
]
for i in [1, 2, 6]:
with pytest.raises(ValueError) as exception:
simulator.probability_of_winning(
[Card("H", "2"), Card("H", "3")], 3, available_cards[:i])
assert "table" in str(exception)
def test_best_five_card_subhand():
best_subhand_cards = [Card("C", "J"),
Card("C", "T"),
Card("C", "9"),
Card("C", "8"),
Card("C", "7")]
seven_cards = best_subhand_cards + [Card("H", "8"), Card("D", "A")]
# in case order matters somehow
random.shuffle(seven_cards)
assert set(SevenCardHand(seven_cards).best_five_card_subhand().cards) == set(best_subhand_cards)
def test_must_have_between_one_and_twentythree_opponents():
for i in [0, 24]:
with pytest.raises(ValueError) as exception:
simulator.probability_of_winning(
[Card("H", "2"), Card("H", "3")], i, [
Card("H", "T"),
Card("H", "A"),
Card("D", "5"),
Card("C", "J"),
Card("C", "9")
])
assert "opponents" in str(exception)
def test_hand_scoring():
raw_hands_in_winning_order = [
["CJ", "CT", "C9", "C8", "C7"], # Straight flush
["C5", "D5", "H5", "S5", "D2"], # Four of a kind
["S6", "H6", "D6", "CK", "HK"], # Full house
["DJ", "D9", "D8", "D7", "D6"], # Flush
["DT", "S9", "H8", "D7", "C6"], # Straight
["CQ", "SQ", "HQ", "H7", "S6"], # Three of a kind
["HJ", "SJ", "C3", "S3", "H2"], # Two pair
["ST", "HT", "S8", "H7", "C4"], # One pair
["DK", "DQ", "S7", "S4", "H3"] # High card
]
hands_in_winning_order = [FiveCardHand([Card(raw_card[0], raw_card[1]) for raw_card in rh]) for rh in raw_hands_in_winning_order]
hand_scores_in_winning_order = [hand.score() for hand in hands_in_winning_order]
assert all(higher_score < lower_score for higher_score, lower_score in zip(hands_in_winning_order, hand_scores_in_winning_order[:1]))
def test_low_straight():
weaker_hand = FiveCardHand([Card("H", "A"), Card("C", "A"), Card("S", "4"), Card("C", "5"), Card("H", "6")])
stronger_hand = FiveCardHand([Card("H", "A"), Card("S", "2"), Card("C", "3"), Card("S", "4"), Card("H", "5")])
assert weaker_hand.score() < stronger_hand.score()
def test_exception_thrown_with_bad_suit():
with pytest.raises(ValueError) as exception:
Card("X", "K")
assert "suit" in str(exception.value)
def test_gt():
assert Card("C", "A") > Card("C", "K")
def test_lt():
assert Card("C", "K") < Card("C", "A")
def test_hash():
assert Card("H", "A").__hash__() == Card("H", "A").__hash__()
assert Card("H", "A").__hash__() != Card("C", "A").__hash__()
assert Card("H", "A").__hash__() != Card("H", "T").__hash__()
def test_equality():
assert Card("H", "A") == Card("H", "A")
assert Card("H", "A") != Card("C", "A")
assert Card("H", "A") != Card("H", "T")
def test_numeric_ranks_monotonicity():
ranks = "23456789TJQKA"
numeric_ranks = [Card("H", r).numeric_rank() for r in ranks]
assert all(larger > smaller for larger, smaller in zip(numeric_ranks[1:], numeric_ranks))
def test_exception_thrown_with_bad_rank():
with pytest.raises(ValueError) as exception:
Card("H", "X")
assert "rank" in str(exception.value)
def test_simulator_sanity():
# No chance of losing with the highest royal flush
assert 1.0 == simulator.probability_of_winning(
[Card("D", "A"), Card("D", "K")], 3, [
Card("D", "Q"),
Card("D", "J"),
Card("D", "T"),
Card("H", "A"),
Card("H", "9")
])
# No chance of winning with 2 and 3 as highest cards
assert 0.0 == simulator.probability_of_winning(
[Card("H", "2"), Card("D", "3")], 3, [
Card("H", "T"),
Card("H", "A"),
Card("D", "5"),
Card("C", "J"),
Card("C", "9")
])
# no certainty, want this to be close to 50% to avoid failures due to inaccurate answers being 1 or 0
chance_of_winning = simulator.probability_of_winning(
[Card("D", "T"), Card("H", "7")], 3, [
Card("H", "T"),
Card("H", "A"),
Card("D", "5"),
Card("C", "J"),
Card("C", "9")
])
assert chance_of_winning not in (1.0, 0.0)
def test_strongest_full_house_wins():
weaker_hand = FiveCardHand([Card("H", "T"), Card("C", "T"), Card("S", "6"), Card("C", "6"), Card("H", "6")])
stronger_hand = FiveCardHand([Card("H", "7"), Card("S", "7"), Card("C", "7"), Card("S", "2"), Card("H", "2")])
assert weaker_hand.score() < stronger_hand.score()
def test_strongest_two_pair_wins():
stronger_hand = FiveCardHand([Card("H", "T"), Card("C", "T"), Card("S", "6"), Card("C", "6"), Card("H", "3")])
weaker_hand = FiveCardHand([Card("H", "A"), Card("S", "9"), Card("C", "9"), Card("S", "7"), Card("H", "7")])
assert weaker_hand.score() < stronger_hand.score()
def test_strongest_pair_wins():
weaker_hand = FiveCardHand([Card("H", "A"), Card("C", "K"), Card("S", "Q"), Card("C", "3"), Card("H", "3")])
stronger_hand = FiveCardHand([Card("H", "A"), Card("S", "K"), Card("C", "K"), Card("S", "7"), Card("H", "6")])
assert weaker_hand.score() < stronger_hand.score()
def test_high_card_does_the_job():
best_straight_flush = [Card("C", rank) for rank in "AKQJT"]
next_best_straight_flush = [Card("C", rank) for rank in "KQJT9"]
assert FiveCardHand(best_straight_flush).score() > FiveCardHand(next_best_straight_flush).score()
