def test_last():
colors = SingleLinkedList()
colors.push("Cadmium Red Light")
assert colors.last() == "Cadmium Red Light"
colors.push("Hansa Yellow")
assert colors.last() == "Hansa Yellow"
colors.shift("Pthalo Green")
assert colors.last() == "Hansa Yellow"
def test_last(self):
colors = SingleLinkedList()
colors.push('Cadmium Red Light')
assert colors.last() == 'Cadmium Red Light'
colors.push('Hansa Yellow')
assert colors.last() == 'Hansa Yellow'
colors.shift('Pthalo Green')
assert colors.last() == 'Hansa Yellow'
def test_last():
colors = SingleLinkedList()
colors.push('red')
assert colors.last() == 'red'
colors.push('yellow')
assert colors.last() == 'yellow'
colors.push('blue')
assert colors.last() == 'blue'
