摩卡的并行测试

Question

我在将以下测试迁移到Mocha框架时遇到了麻烦：

var webdriver = require('selenium-webdriver'),
  By = webdriver.By,
  until = webdriver.until;

var driver;
var config = require('config');
var baseUrl = config.get('baseUrl');
var browsers = ['firefox', 'chrome'];
var flows = browsers.map(function (browser) {
  return webdriver.promise.createFlow(function () {
    driver = new webdriver.Builder()
      // For remote server
      .usingServer('http://127.0.0.1:4444/wd/hub')
      .forBrowser(browser)
      .build();
    var loginPage = new LoginPage(driver, baseUrl);
    loginPage.visit();
    loginPage.login('jonnytest', 'elenbogen');
    var photoViewPage = new PhotoViewpage(driver, baseUrl);
    photoViewPage.visit();
    photoViewPage.deleteAllComments();

    driver.quit();
  });
});
webdriver.promise.fullyResolved(flows).then(function () {
  console.log('All tests passed!');
});

更具体地说，我可以使用selenium-webdriver在多个浏览器上并行运行相同的测试，但Mocha不会公开 control flow 。

我如何在Mocha中编写相同的测试？