def test_insert_3(): # 7
ll = LinkedList()
ll.append(0)
ll.append('a')
ll.append(True)
ll.insert(12)
assert ll.head.next.next.value == 'a'
def test_insert_2(): # 6
ll = LinkedList()
ll.append(0)
ll.append('a')
ll.append(True)
ll.insert(12)
assert ll.head.value == 12
def test_insertBefore_mid(): # 11
ll = LinkedList()
ll.append(True)
ll.append('ayman')
ll.append(0)
ll.insert(74)
actual = ll.insertBefore(True, 'hello world')
excepted = "{ 74 } -> { hello world } -> { True } -> { ayman } -> { 0 } -> Null"
assert actual == excepted
def test_include_2(): # 10
ll = LinkedList()
ll.append(True)
ll.append('ayman')
ll.append(0)
ll.insert(74)
assert ll.include('ayman') == True
def test_include(): # 9
ll = LinkedList()
ll.append(True)
ll.append('a')
ll.append(0)
ll.insert(74)
assert ll.include('test') == False
def test_str(): # 8
ll = LinkedList()
ll.append(True)
ll.append('a')
ll.append(0)
ll.insert(74)
ll.__str__()
assert ll.__str__() == "{ 74 } -> { True } -> { a } -> { 0 } -> Null"
def test_insert_1(): # 5
ll = LinkedList()
ll.insert(6)
assert ll.head.value == 6
def test_append_3(): # 4
ll = LinkedList()
ll.append(1)
ll.append(5)
ll.append(73)
assert ll.head.next.next.value == 73
def test_append_1(): # 2
ll = LinkedList()
ll.append(1)
assert ll.head.value == 1
def test_insertAfter(): # 12
ll = LinkedList()
ll.append(True)
ll.append('ayman')
ll.append(0)
ll.insert(74)
assert ll.insertAfter(
True, 'hello world'
) == "{ 74 } -> { True } -> { hello world } -> { ayman } -> { 0 } -> Null"