def test_top(self):
for i in range(0, 800):
colors = Stack()
colors.push('Blue')
assert colors.top_node() == 'Blue'
colors.pop()
assert colors.top_node() is None
def test_dump(self):
colors = Stack()
colors.push('Magenta')
colors.push('Alizarin')
colors.dump('before Blue')
colors.push('Blue')
colors.dump('after Blue')
def test_pop(self):
colors = Stack()
colors.push('Magenta')
colors.push('Alizarin')
colors.push('Blue')
assert colors.pop() == 'Blue'
assert colors.pop() == 'Alizarin'
assert colors.pop() == 'Magenta'
assert colors.pop() is None
def test_push(self):
colors = Stack()
colors.push('Pthalo Blue')
assert colors.count() == 1
colors.push('Ultramarine Bleu')
assert colors.count() == 2
colors.push('Magenta')
assert colors.count() == 3
colors.push('Green')
assert colors.count() == 4
colors.push('Red')
assert colors.count() == 5