def test_push(self):
stack = Stack()
stack.push('Python')
assert stack.items == ['Python']
# Add another item
stack.push('Java')
assert stack.items == ['Python', 'Java']
def test_pop(self):
stack = Stack()
stack.pop()
stack.push('Python')
stack.push('Java')
result = stack.pop()
assert result == 'Java'
assert stack.items == ['Python']
def test_pop_all(self):
stack = Stack()
stack.push("A")
stack.push("B")
stack.push("C")
stack.push("D")
assert stack.items == ["A", "B", "C", "D"]
stack.pop_all()
assert stack.items == []
def test_isEmpty(self):
stack = Stack()
assert stack.isEmpty() == True
stack.push('Python')
assert stack.isEmpty() == False
def test_size(self):
stack = Stack()
assert stack.size() == 0
stack.push('Python')
stack.push('Java')
assert stack.size() == 2
def test_peek(self):
stack = Stack()
stack.push('Python')
assert stack.peek() == 'Python'
stack.pop()
assert stack.items == []
def __init__(self):
self.stack = Stack()
self.aux_stack = Stack()