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 assert = require('assert');
  var events = require('../');
  
  var e = new events.EventEmitter();
  var times_hello_emited = 0;
  
  e.once('hello', function(a, b) {
    times_hello_emited++;
  });
  
  e.emit('hello', 'a', 'b');
  e.emit('hello', 'a', 'b');
  e.emit('hello', 'a', 'b');
  e.emit('hello', 'a', 'b');
  
  var remove = function() {
    assert.fail(1, 0, 'once->foo should not be emitted', '!');
  };
  
  e.once('foo', remove);
  e.removeListener('foo', remove);
  e.emit('foo');
  
  var times_recurse_emitted = 0;
  
  e.once('e', function() {
  	e.emit('e');
  	times_recurse_emitted++;
  });
  
  e.once('e', function() {
  	times_recurse_emitted++;
  });
  
  e.emit('e');
  
  assert.equal(1, times_hello_emited);
  assert.equal(2, times_recurse_emitted);
  