csrc/node-v0.10.24/test/simple/test-stream2-pipe-error-once-listener.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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var common = require('../common.js');
var assert = require('assert');

var util = require('util');
var stream = require('stream');


var Read = function() {
  stream.Readable.call(this);
};
util.inherits(Read, stream.Readable);

Read.prototype._read = function(size) {
  this.push('x');
  this.push(null);
};


var Write = function() {
  stream.Writable.call(this);
};
util.inherits(Write, stream.Writable);

Write.prototype._write = function(buffer, encoding, cb) {
  this.emit('error', new Error('boom'));
  this.emit('alldone');
};

var read = new Read();
var write = new Write();

write.once('error', function(err) {});
write.once('alldone', function(err) {
  console.log('ok');
});

process.on('exit', function(c) {
  console.error('error thrown even with listener');
});

read.pipe(write);