public void testAreNatural() { Card[] natural = new Deck().cards(); assertTrue(Cards.areNatural(natural)); Card[] jokers = {Card.instance(Rank.jokerRank, Suit.jokerSuit)}; assertFalse(Cards.areNatural(jokers)); Card[] gardena = new Deck(1, 1).cards(); assertFalse(Cards.areNatural(gardena)); }