text: // Copyright Joyent, Inc. and other Node contributors.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a
  // 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,
  // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  // USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  var test = require('tape');
  
  var Readable = require('stream').Readable;
  var timers = require('timers');
  var util = require('util');
  
  test('stream - push strings', function (t) {
    util.inherits(MyStream, Readable);
    function MyStream(options) {
      Readable.call(this, options);
      this._chunks = 3;
    }
  
    MyStream.prototype._read = function(n) {
      switch (this._chunks--) {
        case 0:
          return this.push(null);
        case 1:
          return setTimeout((function() {
            this.push('last chunk');
          }).bind(this), 100);
        case 2:
          return this.push('second to last chunk');
        case 3:
          return timers.setImmediate((function() {
            this.push('first chunk');
          }).bind(this));
        default:
          throw new Error('?');
      }
    };
  
    var ms = new MyStream();
    var results = [];
    ms.on('readable', function() {
      var chunk;
      while (null !== (chunk = ms.read()))
        results.push(chunk + '');
    });
  
    var expect = [ 'first chunksecond to last chunk', 'last chunk' ];
    function done() {
      t.equal(ms._chunks, -1);
      t.deepEqual(results, expect);
      t.end();
    }
    ms.once('end', done);
  });
  