def test_different_friendships_list():
friendships = [(0, 1), (0, 2), (1, 2), (1, 6), (2, 3),
(3, 4), (4, 6), (5, 6), (5, 7), (5, 9),
(6, 7), (6, 8), (6, 9)]
user, friends = get_friend_with_most_friends(friendships)
assert user == 'joyce'
assert sorted(list(friends)) == ['beverly', 'julian', 'kevin', 'nick',
'rod', 'sara']
def test_friendships_list_with_duplicate_names():
names = 'bob bob tim tim julian julian'.split()
ids = range(len(names))
users = dict(zip(ids, names))
friendships = [(0, 1), (0, 2), (0, 4), (0, 5), (1, 3), (2, 4), (4, 5)]
user, friends = get_friend_with_most_friends(friendships, users=users)
assert user == 'bob'
assert sorted(list(friends)) == ['bob', 'julian', 'julian', 'tim']
def test_default_friendships_list():
user, friends = get_friend_with_most_friends(friendships)
assert user == 'sara'
assert sorted(list(friends)) == ['joyce', 'kevin', 'nick', 'rod']