LoginTest.js

const { Builder } = require('selenium-webdriver')
const path = require('path')
const assert = require('assert')

//describe is a method from Mocha
describe('Login', function () {
  this.timeout(30000)
  let driver

  beforeEach(async function () {
    /* const vendorDirectory =
    path.delimiter + path.join(__dirname, '..', 'vendor') 
    process.env.PATH += vendorDirectory */
    driver = await new Builder().forBrowser('firefox').build();
  })
  afterEach(async function () {
    await driver.quit()
  })
  it('with valid credentials', async function () {
    await driver.get('http://the-internet.herokuapp.com/login')
    await driver
      .findElement({ id: 'username' })
      .sendKeys('tomsmith')
    await driver
      .findElement({ id: 'password' })
      .sendKeys('SuperSecretPassword!')
    await driver.findElement({ css: 'button' }).click()
    assert(
      await driver.findElement({
        css: '.flash.success'
      }).isDisplayed(), 'Success message not displayed'
    )
  })
})