def test_stack_limit_reached():
s = Stack(5)
for x in xrange(5):
s.push(x)
assert len(s) == 5
s.push(5) # 0..4 and now 5
assert len(s) == 5 # length is still 5
def test_stack_clear():
s = Stack()
s.push(1)
s.clear()
assert len(s) == 0
def test_stack_push_pop_pop():
s = Stack()
s.push(1)
s.pop()
assert s.pop() == None # is this really the right thing to do?
def test_stack_push_pop():
s = Stack()
s.push(1)
assert s.pop() == 1
assert len(s) == 0
def test_stack_last():
s = Stack()
s.push(1)
assert s.last() == 1
assert len(s) == 1 # the value is still on the stack
def test_stack_push():
s = Stack()
s.push(1)
assert len(s) == 1
