Fix.

node_modules/pump/test-browser.js

@@ -0,0 +1,66 @@
+var stream = require('stream')
+var pump = require('./index')
+
+var rs = new stream.Readable()
+var ws = new stream.Writable()
+
+rs._read = function (size) {
+  this.push(Buffer(size).fill('abc'))
+}
+
+ws._write = function (chunk, encoding, cb) {
+  setTimeout(function () {
+    cb()
+  }, 100)
+}
+
+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 = false
+var rsClosed = false
+var callbackCalled = false
+
+var check = function () {
+  if (wsClosed && rsClosed && callbackCalled) {
+    console.log('test-browser.js passes')
+    clearTimeout(timeout)
+  }
+}
+
+ws.on('finish', function () {
+  wsClosed = true
+  check()
+})
+
+rs.on('end', 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.push(null)
+  rs.emit('close')
+}, 1000)
+
+var timeout = setTimeout(function () {
+  check()
+  throw new Error('timeout')
+}, 5000)