import os
import sys
import pytest
current_dir = os.path.dirname(os.path.realpath(__file__))
sys.path.insert(0, os.path.realpath(os.path.join(current_dir, os.pardir)))

from lib.messaging import CallbackManager

def test_callback_registration():
    def f(arg):
        return arg
    c = CallbackManager()
    c.action_callback("123")(f)
    t = "test"
    assert t == c.action_callbacks["123"](t)