Set a custom room in tests

scalability-benchmark/client/spawn-peer.js

 import puppeteer from "puppeteer"
 
-const appHost = process.env.APP_HOST
+const appUrl = process.env.APP_URL
 const peerIndex = parseInt(process.env.PEER_INDEX)
 const numPeers = parseInt(process.env.NUM_PEERS)
 
@@ -11,7 +11,7 @@ const syncTimeout = numPeers * 4000
   try {
     // Open the application.
     const page = await browser.newPage()
-    await page.goto(appHost)
+    await page.goto(appUrl)
     console.log(`Peer ${peerIndex}: Connected.`)
 
     // Set up observer.

scalability-benchmark/run.sh

@@ -4,7 +4,7 @@ CLIENT_USER=mnr17
 
 cd $(dirname $0)
 
-app_host="https://lets-draw.live"
+app_url="https://lets-draw.live?room=test-$(date +%s)"
 client_hostnames=$(cat client-hostnames)
 num_peers=$(echo $client_hostnames | wc -w)
 
@@ -33,7 +33,7 @@ for hostname in $client_hostnames; do
   ssh -oStrictHostKeyChecking=no $CLIENT_USER@$hostname "
     source ~/.nvm/nvm.sh &&
     cd ~/client &&
-    export APP_HOST=$app_host &&
+    export APP_URL=$app_url &&
     export PEER_INDEX=$current_peer_index &&
     export NUM_PEERS=$num_peers &&
     export PUPPETEER_EXECUTABLE_PATH=\"/opt/google/chrome/chrome\" &&