def test_front_and_back_05():
# random
for _ in range(100):
int_list = [
random.randint(-100, 100) for _ in range(random.randint(0, 50))
]
assert exam.front_and_back(int_list) == [
int_list[(z + 1) // 2 * (-1)**z] for z in range(len(int_list))
]
def test_front_and_back_01():
# very short list
assert exam.front_and_back([1]) == [1]
assert exam.front_and_back([1, 2]) == [1, 2]
def test_front_and_back_03():
# longer odd list
assert exam.front_and_back([1, 2, 3, 4, 5]) == [1, 5, 2, 4, 3]
assert exam.front_and_back([1, 2, 3, 4, 5, 6, 7]) == [1, 7, 2, 6, 3, 5, 4]
def test_front_and_back_04():
# empty list
assert exam.front_and_back([]) == []
def test_front_and_back_02():
# longer even list
assert exam.front_and_back([1, 2, 3, 4, 5, 6]) == [1, 6, 2, 5, 3, 4]
assert exam.front_and_back([1, 2, 3, 4, 5, 6, 7,
8]) == [1, 8, 2, 7, 3, 6, 4, 5]