Facebook discourages (disallows, really) the user of fake Facebook accounts when testing against their APIs. Instead, they provider APIs for creating and destroying test users (up to 500 per app). See https://developers.facebook.com/docs/test_users/ for the official documentation on this subject.
Working with their API is reasonably simple, but it would be more handy if Spring Social offered some form of support for creating, managing, and destroying test users in Facebook. This would come in handy not only for writing integration tests for Spring Social's own API operations, but also for application developers wishing to write integration tests for their code that uses Spring Social's API binding.