when epxect failed throw err TypeError: undefined is not a function

[stormslowly]

product.js

var express = require('express') // express 4.2.0
var router = express.Router();
router.get('/:uuid/:item', function (req, res) {
  res.end(300);
});
module.exports = router;

testcode.js

'use strict';
var expect = require('chai').expect;
var table = require('./product.js');

describe('table', function () {

  it('should pass ', function (done) {

    expect(1).to.equal(1);
    table.handle( { url: '/test/pois',method:'GET'},
      {
        end: function(statusCode){

          expect(statusCode).to.equal(200);

          done();
        }
      }
    );
  });
});

the case should failed , i expect chai.expect tell me that 200 is not equals to 300.
but it throws error like bellow. ( then i change it to expect(statusCode).to.equal(300); verything is ok)

1) table should pass :
     TypeError: undefined is not a function
      at D:\git\Qbengo\sliteSerivce\node_modules\express\lib\router\index.js:137:5
      at D:\git\Qbengo\sliteSerivce\node_modules\express\lib\router\index.js:250:10
      at next (D:\git\Qbengo\sliteSerivce\node_modules\express\lib\router\index.js:160:14)
      at next (D:\git\Qbengo\sliteSerivce\node_modules\express\lib\router\index.js:212:7)
      at Function.proto.handle (D:\git\Qbengo\sliteSerivce\node_modules\express\lib\router\index.js:151:3)
      at Context.<anonymous> (D:\git\Qbengo\sliteSerivce\test.js:11:11)
      at Test.Runnable.run (D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runnable.js:204:15)
      at Runner.runTest (D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runner.js:378:10)
      at D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runner.js:456:12
      at next (D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runner.js:303:14)
      at D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runner.js:313:7
      at next (D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runner.js:251:23)
      at Object._onImmediate (D:\userdata\pshu\Application Data\npm\node_modules\mocha\lib\runner.js:280:5)
      at processImmediate [as _immediateCallback] (timers.js:330:15)

[stormslowly]

when expect failed, it throw errors. but there is no error handling in res.end.
so the end stub should not throw any error out.

'use strict';
var expect = require('chai')
  .expect;
var table = require('./product.js');


var expectStatus = function (expectCode, done) {

  return function (statusCode) {

    console.log('fsfsfsdfsfsfssd',expectCode,statusCode);
    try {
      expect(statusCode).to.equal(expectCode);
      done();
    } catch (e) {

      done(e);
      // console.log(e);
    }
  };
};


describe('table', function () {

  it('should pass ', function (done) {

    expect(1).to.equal(1);
    table.handle({
      url: '/test/pois',
      method: 'GET'}, {end: expectStatus(200, done)});
  });
});

i think is a solution for my problem.