text: 'use strict';
  
  require('co-mocha');
  let sinon = require('sinon');
  
  let chai = require('chai');
  let sinonChai = require('sinon-chai');
  
  chai.use(sinonChai);
  global.expect = chai.expect;
  global.sinon = sinon;
  
  beforeEach(function() {
    this.sandbox = sinon.sandbox.create();
  });
  
  afterEach(function() {
    this.sandbox.restore();
  });
  