If that is the test (to be like Abraham and allow Charlie to die because that's what the vision said) I would hate to be in Desmond's shoes.
In my eyes, having the foreknowledge and allowing someone to die would be the same as killing them yourself.
If the test is to be willing to kill (allow the vision to play out without altering it) then I think I wouldn't pass.
I'm just not built that way.
