Lol wing of no wing, that's exactly what I do. Sometimes I create a separate map just to make sure something works the way I think it would.
Diggidoyo, i apologize for the snappy reaction (I was way too tired I guess), but I now understand you were trying to be sarcastic, so sorry ><

[q]Use Lan connection to test its as quick as single and you can see forces[/q]
Yeah it test both on and off bnet, but always multiplayer just because single player is a horrible thing for triggers.. they're all slow and stuff. Esc on single, what's that do? I just alt+q alt+o-n-e for high latency and stuff.
10 seconds starts to add up when you test really often- as much as I do anyway. What I found out is that you can still save your map while the countdown is going, so instead of saving the map, maximize starcraft, make the game and go, you can create, go, and minize to save as it countsdown, then continue on with your train-of-thought just so you don't lose it. Then you can go and test the game, and then repeat.
It becomes a good thing to do when you like to get in the game and then edit a bit further on then come back and test the game.