How can I test if visit monitoring is working in my iOS app? (Using startMonitoringVisits api)

I'm developing a location journaling app for iPhone, and I'm trying to use the new visit monitoring API for iOS 8. I've read the Xcode documentation and watched a WWDC 2014 Video, and I think I've properly implemented the startMonitoringVisits and didVisit methods. However, I'd like to find out if they are actually working before I build the rest of the app.

How can I find out if my app is receiving visit data? Is there a way I can use the iPhone simulator in Xcode to find out? And finally, will visit monitoring work if a user has turned off Frequent Locations in Privacy > Location Services > System Services?

I'd really appreciate it if any code examples are in Swift, as I'm more comfortable with it, but I don't want to be too demanding, so don't hesitate if you have some Objective-C examples.

Thanks.