wanted expectations on canned server

example.test.js

'use strict';

var canned = require('canned');
var http = require('http');
var opts = { logger: process.stdout };
var can = canned('/path/to/canned/response/folder', opts);

describe('Zoopla Property Listing JSON', function () {

  var mock_server;

  before(function () {
    http.createServer(can).listen(3000)
    casper.start('http://example.com/');
  });

  it('should Call 3rd Party when clicked', function () {
    casper.thenOpen('http://example.com/something.html', function () {
      this.clickLabel('Do Something Button');
    });
    casper.waitForUrl(/done\.html/, function () {
      var request = can.lastPostTo('/api/some_resource');
      var posted_body = JSON.parse(request.body);
      var expected = { something: true };
      expect(posted_body).to.eql(expected);
    });
  });
});