old_contents: 'use strict';
  
  var expect = require('expect.js');
  
  exports.successResponseCallback = function successResponseCallback(cb, close) {
    return function testSuccessResp(res) {
      res.setEncoding('utf8');
      expect(res.statusCode).to.be(200);
      expect(res.headers['content-type']).to.be('text/javascript; charset=utf-8');
      expect(res.headers['cache-control']).to.be('no-cache');
  
      res.on('data', function (chunk) {
        expect(chunk).to.be.a('string');
        expect(chunk).to.not.be.empty();
      });
  
      res.on('close', cb);
      res.on('end', function () {
        if (close) close(cb);
        else cb();
      });
    }
  };
  
  exports.failureResponseCallback = function failureResponseCallback(cb, close) {
    return function testFailureResp(res) {
      res.setEncoding('utf8');
      expect(res.statusCode).to.be(500);
  
      res.on('data', function (chunk) {
        expect(chunk).to.be.a('string');
        expect(chunk).to.contain('Cannot require');
      });
  
      res.on('close', cb);
      res.on('end', function () {
        if (close) close(cb);
        else cb();
      });
    }
  };
  
new_contents: 'use strict';
  
  var expect = require('expect.js');
  
  exports.successResponseCallback = function successResponseCallback(cb, close) {
    return function testSuccessResp(res) {
      res.setEncoding('utf8');
      expect(res.statusCode).to.be(200);
      expect(res.headers['content-type']).to.be('text/javascript; charset=utf-8');
      expect(res.headers['cache-control']).to.be('no-cache');
  
      res.on('data', function (chunk) {
        expect(chunk).to.be.a('string');
        expect(chunk).to.not.be.empty();
      });
  
      res.on('close', cb);
      res.on('end', function () {
        if (close) close(cb);
        else cb();
      });
    }
  };
  
  exports.failureResponseCallback = function failureResponseCallback(cb, close) {
    return function testFailureResp(res) {
      res.setEncoding('utf8');
      expect(res.statusCode).to.be(200);
  
      res.on('data', function (chunk) {
        expect(chunk).to.be.a('string');
        expect(chunk).to.contain('Cannot require');
      });
  
      res.on('close', cb);
      res.on('end', function () {
        if (close) close(cb);
        else cb();
      });
    }
  };
  
subject: Update tests up to status code change