def test_flip_toggles_card_facing_direction():
card = PlayingCard(2, 's')
card.flip()
assert_true(card.is_face_up())
card.flip()
assert_false(card.is_face_up())
def test_new_card_has_rank_suit_and_is_face_down():
card = PlayingCard('A', 's')
assert_equals(card.rank, 'A')
assert_equals(card.suit, 's')
assert_equals(card.is_face_up(), False)