import abc

# === basic import ===
assert abc.ABC is not None, 'ABC is not None'


# === abstractmethod as no-op decorator ===
def my_func():
    return 42


decorated = abc.abstractmethod(my_func)
assert decorated() == 42, 'abstractmethod passes through'

# === from import ===
from abc import ABC, abstractmethod, abstractproperty

assert ABC is not None, 'from import ABC'


def another_func():
    return 99


result = abstractmethod(another_func)
assert result() == 99, 'from import abstractmethod passes through'
assert abstractproperty(another_func) is not None, 'from import abstractproperty returns a value'

# === abstractproperty ===
decorated_prop = abc.abstractproperty(another_func)
assert decorated_prop is not None, 'abstractproperty returns a value'

# === get_cache_token ===
token = abc.get_cache_token()
assert isinstance(token, int), 'get_cache_token returns int'


# === update_abstractmethods ===
class SimpleABC:
    pass


updated = abc.update_abstractmethods(SimpleABC)
assert updated is SimpleABC, 'update_abstractmethods returns class'
