Test if a created object is nil

I am using this code

    if (managedObject == nil) {
        NSLog(@"foooo");
    }
开发者_开发百科

to test if the created managedObject is nil or not. But I can never print this Fooooo. Do you know what I am doing wrong?

exactly the same with comparing with nil like this

if (!managedObject) {
    NSLog(@"foooo");
}