How to mock session data for socket.io 0.9.16 in express.io 1.1.13

gistfile1.js

var app = require('express.io')();
app.http().io();
app.listen(7076)

// override authorization checks, always true. This works even though app has begun listening.
app.io.set('authorization', function (handshake, accept) { accept(null, true); });

// register a new handler for the message handler under test. The can inject mock data into session.
var handler = app.io.router['get-discussions'];
app.io.router['get-discussions'] = function (request) {
  
    // create a new session for the request
    request.sessionStore.generate(request);
    
    // add some data to the session
    request.session.apikey = "1234567890"
    
    // call the sut.  
    handler(request);
};