text: 
  var through = require('through2')
    , setImmediate = global.setImmediate || function(callback) {
        setTimeout(callback, 0);
      };
  
  module.exports.testStream = function() {
    return through(function(buf, enc, cb) {
      var that = this;
      setImmediate(function() {
        that.push(buf)
        cb();
      });
    });
  };
  