Problems with Singleton Pattern

Question

I\'ve been reading about Singleton pattern for last few days. The general perception is that the scenarios where it is required are quite few (if not rare) probably because

Answer 1

I wouldn't necessarily equate Singletons with Globals. Nothing should stop a developer from passing an instance of the object, singleton or otherwise, as a parameter, rather than conjure it out of the air. The intent of hiding its global accessibility could even be done by hiding its getInstance function to a few select friends.

As far as the unit testing flaw, Unit means small, so re-invoking the app to test the singleton a different way seems reasonable, unless I'm missing something the point.