/*<replacement>*/
var bufferShim = require('safe-buffer').Buffer;
/*</replacement>*/
var common = require('../common');
var stream = require('../../');
var util = require('util');

function Writable() {
  this.writable = true;
  stream.Writable.call(this);
  this.prependListener = undefined;
}
util.inherits(Writable, stream.Writable);
Writable.prototype._write = function (chunk, end, cb) {
  cb();
};

function Readable() {
  this.readable = true;
  stream.Readable.call(this);
}
util.inherits(Readable, stream.Readable);
Readable.prototype._read = function () {
  this.push(null);
};

var w = new Writable();
w.on('pipe', common.mustCall());

var r = new Readable();
r.pipe(w);