# Test in the lab

> Run a StreamArena game with a pretend chat for each platform and your own phone as a player, before anyone sees it.

The lab runs your game with a pretend chat for each platform and your own phone as a player, so you can play a full game before anyone sees it. The pretend chat behaves like the real ones: YouTube messages arrive in batches, the way the YouTube API delivers them, and Twitch and Kick messages arrive one by one.

## The lab controls

| Control | Range | Use it to |
|---|---|---|
| Viewers (bots) | 0 to 30 | Play with no one, a handful or a busy chat |
| How good they are | 5% to 95% | Check the round is fun when chat is wrong a lot, or right fast |
| YouTube read every | 1 to 15 seconds | See what a slow YouTube read does to your reveal |

## What to check

- **A small chat.** Set viewers to 1 or 2 and check the house player keeps the round alive.
- **A busy chat.** Set viewers to 30 and check answers still read in a second.
- **Phones.** Join on your phone and answer. Phone answers must stay hidden until the reveal.
- **Slow YouTube.** Set the YouTube read to 15 seconds and check a late answer keeps its place.

> **Planned:** Today the lab ships with the internal runtime. `streamarena dev` will run it on your machine, and `streamarena submit` will send a game for review.