def test_update():
test_obj = LRUCache(1)
test_obj.write("some_key", 42)
time.sleep(2)
assert test_obj.is_expired("some_key")
test_obj.update("some_key")
assert not test_obj.is_expired("some_key")
def test_update():
test_obj = LRUCache(1)
test_obj.write("some_key", 42)
time.sleep(2)
assert test_obj.is_expired("some_key")
test_obj.update("some_key")
assert not test_obj.is_expired("some_key")
