### Question:
JDKImperativeDeckOfCardsAsSortedSet { public SortedSet<Card> spades() { return this.cardsBySuit.get(Suit.SPADES); } JDKImperativeDeckOfCardsAsSortedSet(); Deque<Card> shuffle(Random random); Set<Card> deal(Deque<Card> deque, int count); List<Set<Card>> shuffleAndDeal(Random random, int hands, int cardsPerHand); List<Set<Card>> dealHands(Deque<Card> shuffled, int hands, int cardsPerHand); SortedSet<Card> diamonds(); SortedSet<Card> hearts(); SortedSet<Card> spades(); SortedSet<Card> clubs(); Map<Suit, Long> countsBySuit(); Map<Rank, Long> countsByRank(); SortedSet<Card> getCards(); Map<Suit, SortedSet<Card>> getCardsBySuit();  }### Answer:
@Test public void spades() { Assert.assertEquals(13, this.jdkDeck.spades().size()); Assert.assertTrue(Iterate.allSatisfy(this.jdkDeck.spades(), Card::isSpades)); }