public void verify_snapshot_check_version()
{
var id = new TestEventUnfolderId(1);
var unfolder = new TestProjector();
var memento = (EventUnfolderMemento)unfolder.GetSnapshot();
memento.Signature = "OTHER"; //change the version of the memento.
Snapshot s = new Snapshot(id, 2, memento);
_persister.Load("", 1, "").ReturnsForAnyArgs(s);
sut.GetById <TestProjector, TestAggregateQueryModel>(id, 200);
_eventStore.Received().OpenStream("BLAH", id, 0, 200);
}