So siehts ganz gut aus !

node_modules/mqtt/test/util.js

@@ -0,0 +1,13 @@
+'use strict'
+
+var through = require('through2')
+
+module.exports.testStream = function () {
+  return through(function (buf, enc, cb) {
+    var that = this
+    setImmediate(function () {
+      that.push(buf)
+      cb()
+    })
+  })
+}