node/test/simple/test-http-upgrade-client2.js

var common = require("../common");
var assert = common.assert
var http = require('http'),
    CRLF = '\r\n';

var server = http.createServer();
server.on('upgrade', function(req, socket, head) {  
  socket.write('HTTP/1.1 101 Ok' + CRLF +
               'Connection: Upgrade' + CRLF +
               'Upgrade: Test' + CRLF + CRLF + 'head');
  socket.on('end', function () {
    socket.end();               
  });
});


server.listen(common.PORT, function () {

  var client = http.createClient(common.PORT);

  function upgradeRequest(fn) {
    var request = client.request('GET', '/', {
      'Connection': 'Upgrade',
      'Upgrade': 'Test'
    });
    
    var wasUpgrade = false;
    
    function onUpgrade(res, socket, head) {
      wasUpgrade = true;
      
      client.removeListener('upgrade', onUpgrade);
      socket.end();    
    }
    client.on('upgrade', onUpgrade);
    
    function onEnd() {
      client.removeListener('end', onEnd);
      if (!wasUpgrade) {
        throw new Error('hasn\'t received upgrade event');
      } else {      
        fn && process.nextTick(fn);
      }
    }
    client.on('end', onEnd);
    
    request.write('head');

  }

  successCount = 0;
  upgradeRequest(function() {
    successCount++;  
    upgradeRequest(function() {
      successCount++;  
      // Test pass
      console.log('Pass!');
      client.end();
      client.destroy();
      server.close();
    });
  });

});

process.on('exit', function () {
  assert.equal(2, successCount);
});