Class Trap

celery/contrib/testing/app.py:23–36

Trap that pretends to be an app but raises an exception instead. This to protect from code that does not properly pass app instances, then falls back to the current_app.

class Trap:
    """Trap that pretends to be an app but raises an exception instead.

    This to protect from code that does not properly pass app instances,
    then falls back to the current_app.
    """

    def __getattr__(self, name):
        # Workaround to allow unittest.mock to patch this object
        # in Python 3.8 and above.
        if name == '_is_coroutine' or name == '__func__':
            return None
        print(name)
        raise RuntimeError('Test depends on current_app')


class UnitLogging(symbol_by_name(Celery.log_cls)):