def test_lifo():
stack = Stack()
stack.push(5)
stack.push(6)
assert stack.pop() == 6
assert stack.pop() == 5
def stack_reverse(l):
s = Stack(len(l))
for e in l:
s.push(e)
r = []
while not s.is_empty():
r.append(s.pop())
return r
def test_push_pop_empty():
stack = Stack()
assert stack.empty()
stack.push(5)
assert stack.pop() == 5
assert stack.empty()
def test_capacity():
# Create a stack that can hold a single element only.
stack = Stack(1)
assert stack.empty()
stack.push(5)
# Attempting to push an additional item should fail.
with pytest.raises(TypeError) as e_info:
stack.push(6)
def setUp(self):
self.stack = Stack()
def setUp(self):
self.stack = Stack()
self.stack.push(1)
self.stack.push(2)
self.stack.push(3)
def test_pop():
stack = Stack()
with pytest.raises(TypeError) as e_info:
stack.pop()