def test_dump():
colors = SingleLinkedList()
colors.push('red')
colors.push('white')
colors.push('blue')
colors.push('yellow')
assert colors.dump() == '[red, white, blue, yellow]'
colors.remove('white')
assert colors.dump() == '[red, blue, yellow]'
colors.pop()
assert colors.dump() == '[red, blue]'
colors.popleft()
assert colors.dump() == '[blue]'
def test_remove():
colors = SingleLinkedList()
colors.push('red')
colors.push('white')
colors.push('blue')
colors.push('yellow')
assert colors.count() == 4
assert colors.remove('white') == True
assert colors.count() == 3
assert colors.dump() == '[red, blue, yellow]'
assert colors.remove('blue') == True
assert colors.count() == 2
assert colors.remove('banana') == False
assert colors.remove('yellow') == True
assert colors.count() == 1