| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 | var pump = require('./index')var rs = require('fs').createReadStream('/dev/random')var ws = require('fs').createWriteStream('/dev/null')var toHex = function () {  var reverse = new (require('stream').Transform)()  reverse._transform = function (chunk, enc, callback) {    reverse.push(chunk.toString('hex'))    callback()  }  return reverse}var wsClosed = falsevar rsClosed = falsevar callbackCalled = falsevar check = function () {  if (wsClosed && rsClosed && callbackCalled) {    console.log('test-node.js passes')    clearTimeout(timeout)  }}ws.on('close', function () {  wsClosed = true  check()})rs.on('close', function () {  rsClosed = true  check()})var res = pump(rs, toHex(), toHex(), toHex(), ws, function () {  callbackCalled = true  check()})if (res !== ws) {  throw new Error('should return last stream')}setTimeout(function () {  rs.destroy()}, 1000)var timeout = setTimeout(function () {  throw new Error('timeout')}, 5000)
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