Model Mock for unit testing Sails.js applications

gistfile1.js

var Waterline, count, memory, _;

_ = require('lodash');

// sails-memory stores the adapter as a 
// variable and it needs a different version for each instance
count = 0;

Waterline = require('waterline');

memory = require('sails-memory');

/**
 * Creates an Instance of a Waterline model using the memory adapter
 * @example 
 *  MockModel = require('<this file>');
 *  MockModel({
 *    attributes:{
 *      name:'string'
 *    }, 
 *    tableName:'people'
 *    }, function(err, myMockModel){
 *      // ...do stuff with your model
 *      global.People = myMockModel
 *    });
 * @param {object} This can just be the attributes, or the entire model file from your sails directory
 * @param {function} callback once table has been synced - eg function(err, model){}
 */

module.exports = function(modelOptions, cb) {
  var Model, config, connections, options, waterline;
  count++;
  options = _.merge({
    connection: 'memory' + count,
    tableName: 'testTable'
  }, modelOptions);
  Model = Waterline.Collection.extend(options);
  waterline = new Waterline();
  waterline.loadCollection(Model);
  connections = {};
  connections['memory' + count] = {
    adapter: 'memory' + count
  };
  config = {
    connections: connections,
    adapters: {}
  };
  config.adapters['memory' + count] = memory;
  return waterline.initialize(config, function(err, allItems) {
    var TestTable;
    if (err) {
      return cb(err);
    }
    TestTable = allItems.collections[options.tableName.toLowerCase()];
    return TestTable.sync(function(err) {
      return cb(err, TestTable);
    });
  });
};

this method is not working for native methods.