def init_stack():
new_stack = Stack()
my_list = [1, 2, 3, 4]
for el in my_list:
new_stack.push(el)
return new_stack
def test_enqueue_two():
queue = PseudoQueue()
queue.enqueue(Stack())
queue.front.push('Front')
queue.enqueue(Stack())
queue.rear.push('Rear')
assert queue.front.peek() == 'Front' and queue.rear.peek() == 'Rear'
def my_stack():
new_stack = Stack()
values = ["a", "b", "c", 10]
for el in values:
new_stack.push(el)
return new_stack
def my_stack():
new_stack = Stack()
values = ['a', 'b', 'c', 10]
for el in values:
new_stack.push(el)
return new_stack
def test_dequeue_two():
queue = PseudoQueue()
queue.enqueue(Stack())
queue.front.push('First')
queue.enqueue(Stack())
queue.rear.push('Second')
assert queue.dequeue().peek() == 'First' and queue.dequeue().peek(
) == 'Second'
def test_peek():
s = Stack()
s.push("apple")
s.push("banana")
actual = s.peek()
expected = "banana"
assert actual == expected
def test_PseudoQueue_init_stack(): stack_one = Stack() stack_one.push(15) stack_one.push(10) stack_one.push(5) stack_one.push(0) queue = PseudoQueue(stack_one) actual = str(queue) expected = '0 ->5 ->10 ->15' assert actual == expected
def test_enqueue_empty_stack():
pseudo_q = PseudoQueue(Stack())
pseudo_q.enqueue("cat")
assert pseudo_q.stack1.peek() == "cat"
def test_stack():
stack = Stack()
with pytest.raises(InvalidOperationError) as error:
stack.peek()
assert str(error.value) == "Method not allowed on empty collection."
def test_dequeue_one():
queue = PseudoQueue()
queue.enqueue(Stack())
queue.front.push('First')
assert queue.dequeue().peek() == 'First'
def test_enqueue_empty():
queue = PseudoQueue()
queue.enqueue(Stack())
with pytest.raises(InvalidOperationError) as error:
queue.front.peek()
assert str(error.value) == "Method not allowed on empty collection."
def test_stack_instance():
assert Stack()
def test_pop_single():
s = Stack()
s.push("apple")
actual = s.pop()
expected = "apple"
assert actual == expected
def test_pop_some():
s = Stack()
s.push("apple")
s.push("banana")
s.push("cucumber")
s.pop()
actual = s.pop()
expected = "banana"
assert actual == expected
def new_stack():
print('in new list')
test_stack = Stack()
for i in range(1, 20):
test_stack.push(i)
return test_stack
def test_dequeue_empty():
pseudo_q = PseudoQueue(Stack())
with pytest.raises(Exception):
result = pseudo_q.dequeue()
def test_pop_empty():
s = Stack()
with pytest.raises(InvalidOperationError) as e:
s.pop()
assert str(e.value) == "Method not allowed on empty collection"