def test_push_back():
ll = LinkedList()
ll.push_back(10)
assert ll.back() == 10
ll.push_back(20)
assert ll.back() == 20
ll.push_back(30)
assert ll.back() == 30
def test_back(self):
linked_list = LinkedList()
self.assertEqual(linked_list.back(), None)
linked_list.push_back(1)
linked_list.push_back(2)
linked_list.push_back(3)
self.assertEqual(linked_list.back(), 3)
def test_back():
ll = LinkedList()
ll.insert(0, 30)
assert ll.back() == 30
ll.insert(0, 20)
assert ll.back() == 30
ll.insert(0, 10)
assert ll.back() == 30
ll.insert(2, 40)
assert ll.back() == 30
ll.insert(1, 10)
assert ll.back() == 30
ll.insert(3, 90)
assert ll.back() == 30
def main():
my_linked_list = LinkedList()
print('my_linked_list.empty():', my_linked_list.empty())
print('Pushing 10 and 20 to front')
my_linked_list.push_front(10)
my_linked_list.push_front(20)
print("My Linked List: ", my_linked_list)
print("my_linked_list.size(): ", my_linked_list.size())
print('my_linked_list.empty():', my_linked_list.empty())
print('Pushing 5 and 0 to back')
my_linked_list.push_back(5)
my_linked_list.push_back(0)
print("My Linked List: ", my_linked_list)
print('my_linked_list.pop_front(): ', my_linked_list.pop_front())
print("My Linked List: ", my_linked_list)
print('my_linked_list.pop_back(): ', my_linked_list.pop_back())
print("My Linked List: ", my_linked_list)
print('my_linked_list.front(): ', my_linked_list.front())
print('my_linked_list.back(): ', my_linked_list.back())
print("My Linked List: ", my_linked_list)
print('my_lined_list.insert(1, 7): ', my_linked_list.insert(1, 7))
print("My Linked List: ", my_linked_list)
print('my_lined_list.insert(2, 101): ', my_linked_list.insert(2, 101))
print("My Linked List: ", my_linked_list)
print('my_linked_list.value_at(2): ', my_linked_list.value_at(2))
# print('my_linked_list.value_at(5): ', my_linked_list.value_at(5))
print('my_linked_list.erase(2)')
my_linked_list.erase(2)
print("My Linked List: ", my_linked_list)
print('my_linked_list.remove_value(7)')
my_linked_list.remove_value(7)
print("My Linked List: ", my_linked_list)
print('my_linked_list.remove_value(10)')
my_linked_list.remove_value(10)
print("My Linked List: ", my_linked_list)
print('my_linked_list.size(): ', my_linked_list.size())
print('Pushing 15 and 20 to back')
my_linked_list.push_back(15)
#my_linked_list.push_back(20)
print("My Linked List: ", my_linked_list)
print(my_linked_list.reverse())
print("My Linked List: ", my_linked_list)
