test: refactor test:demo script into demo/*/test.sh

demo/express/package.json

@@ -1,12 +1,12 @@
 {
-  "name": "express-demo",
+  "name": "liquidjs-demo-express",
   "version": "1.0.0",
   "private": true,
   "description": "Express Demo Using liquidjs",
   "main": "index.js",
   "scripts": {
     "start": "node index.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "./test.sh"
   },
   "author": "harttle",
   "license": "MIT",

demo/express/test.sh

@@ -0,0 +1,20 @@
+set -x
+
+LOG_FILE=$(mktemp)
+npm start > $LOG_FILE 2>&1 &
+SERVER_PID=$!
+while ! grep -q "Express running" "$LOG_FILE"; do
+  if ! kill -0 $SERVER_PID; then
+    echo "Server exited unexpectedly."
+    cat $LOG_FILE
+    return 1
+  fi
+  sleep 1
+done
+curl http://127.0.0.1:3000 | grep -q 'Welcome to LiquidJS'
+RESULT=$?
+killall node
+rm $LOG_FILE
+if [ $RESULT != 0 ]; then
+  exit 1
+fi