from memoize import memoize

COUNTER = 0

@memoize
def func(*args, **kwargs):
    global COUNTER
    COUNTER += 1
    return []

def test_memoize_tuple_arg():
    old = COUNTER
    a, b = (), ()
    func(a)
    func(b)
    assert COUNTER - old == 1

def test_memoize_list_arg():
    "Just check that function still works."
    a, b = [], []
    func(a)
    func(b)

def test_memoize_immutable_kwargs():
    "Just check that function still works."
    old = COUNTER
    func('a', 'b', a='x', b=())
    func('a', 'b', a='x', b=())
    assert COUNTER - old == 1

def test_memoize_mutable_kwargs():
    "Just check that function still works."
    func((), (), a={}, b={}, c=())
    func((), (), a={}, b={}, c=())