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

test/demo/test.sh

@@ -0,0 +1,23 @@
+# npm run build before running this check
+set -x
+export CI=true
+
+if [ ! -d dist ]; then
+  echo >2 'build and link liquidjs before run test.sh'
+  exit 1
+fi
+
+npm link
+
+for demo in $(ls demo); do
+  cd demo/$demo
+  npm link liquidjs
+
+  if npm test; then
+    echo [success] demo/webpack
+  else
+    echo [fail] demo/webpack
+    exit 1
+  fi
+  cd -
+done