Intro

Chester Rivas

Senior Front-End Developer

E: chester.rivas@gmail.com

GitHub: codebend3r

E2E Testing

E2E Testing

  • Nightwatch.js
  • environments (local, dev, prod)
  • subset of tests (sanity tests)
  • CI/CD
  • Browserstack!

E2E Options

Why Nightwatch?

  • CLI support
  • tests are written in ES6
  • Integrations supported for Jenkins/Circle CI/Slack
  • Supports multiple browsers, not just Chrome
  • Customizable assertions and PageObjects
  • Supported by Browserstack (all the browsers and all the versions on multiple OSs)

Getting Setup

  • Everything is installed through NPM (even the drivers)
"nightwatch": "1.0.19",
"chromedriver": "2.46.0",
"geckodriver": "1.16.2",
"selenium-server": "3.141.59",
"selenium-server-standalone-jar": "3.141.5",
  • Nightwatch config file
    • specify test paths
    • custom assertions path
    • custom object aka page objects path

Examples and Running Tests

nightwatch -t $TESTS_PATH -c $CONFIG -e $BROWSER --tag $TAG

Insanity Tests

Sanity Tests

  • aka Smoke Screen Tests
  • We define sanity tests as any feature which is mature enough to expect a constant result
  • Page Objects - useful for repetitive actions:
    • logging in
    • clicking on a link
    • redirecting to page
    • liking a comment
  • Slowly build up to larger more complicated tests

What is Not Sanity?

  • Any tests that take you to a third-party website
  • Tests which go through multiple steps and take a long time to complete
  • Tests that are comprised of lots of other smaller tests
  • Tests that effect production data

Page Objects and Custom Assertions

Continuous Integration

CI/CD Integration

  • Jenkins
  • How often do we want to test?
  • What do we want to test?
  • At least test on every merge into master
  • Run nightly tests to ensure no third party has altered the behaviour of your website or web app
  • Need to optimize build and deploy along with a short subset of E2E tests (sanity)
  • As little dependencies as possible, use Browserstack

Browserstack

  • Custom config file specifically for Browserstack
  • Browserstack has support for all browsers on multiple versions
  • You don't need to manage/update multiple drivers in your codebase if you don't want to
  • Records each test so you can play it back
  • Ideal for CI/CD

https://www.browserstack.com/

Best Practices

  • For repetitive actions and assertions use Page Objects
  • Break into small tests doing 1 or 2 actions, then chain them if needed
  • Tackle low hanging fruit first
  • Test on the fastest server first (PROD), then slower QA/Staging servers
  • Structure all configurations based on ENV
    • urls
    • timeouts (tricky)
  • For testing breakpoints make tests re-usable with only the window size changing 
  • Do not test features that are still in development
  • Put yourself in the shoes of QA, what would they test and how?
  • Tests should not depend on each other (put things back how you found them)
  • Don't over-engineer tests, get them working first, optimize later

Outro

E2E Testing with Nightwatch

By Chester Rivas

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E2E Testing with Nightwatch

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