from memoize import fibonacci

def test_fibonacci_0():
    assert fibonacci(0) == 0

def test_fibonacci_1():
    assert fibonacci(1) == 1

def test_fibonacci_2():
    assert fibonacci(2) == 1

def test_fibonacci_3():
    assert fibonacci(3) == 2

def test_fibonacci_10():
    assert fibonacci(10) == 55

def test_fibonacci_20():
    assert fibonacci(20) == 6765