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Browser Automated Testing with Headless Chrome Derek Binkley @DerekB_WI

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Derek Binkley @DerekB_WI Who Am I? • Derek Binkley • @TurnTo networks • Married, 2 daughters, 1 son

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Customer Generated Content

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Derek Binkley @DerekB_WI JavaScript Experience?

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What is It?

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Derek Binkley @DerekB_WI What Are We Doing? • Automate a browser • Try out a site/application • Validate functionality

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Derek Binkley @DerekB_WI Headless Chrome • June 2017 • Full browser • Chrome Dev Tools • No GUI

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Headless Chrome will replace PhantomJS

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Is Anybody There?

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Derek Binkley @DerekB_WI Why? • Reliability • Dependability • Sleep better after an update

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Derek Binkley @DerekB_WI Install • npm init • npm i —save mocha chai • npm i --save puppeteer • Add test script to package.json

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Derek Binkley @DerekB_WI Basics • Test Defined as JavaScript • Full Access to DOM • Assertions using Chai • Run using Mocha

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Derek Binkley @DerekB_WI Setup Command package.json

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Let’s Get Working

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Imports

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Test Suite Setup

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Setup and Teardown

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The Assertion

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Run the Test

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Example 2

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Setup Next Test

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Click a Button

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CSS Class Change

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Evaluate page

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Run the Test

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Take a Screenshot

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afterEach() runs after every test

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Example 4

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Print to PDF

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• Try out some pdf options of your own • https:/ /github.com/GoogleChrome/puppeteer/blob/ master/docs/api.md#pagepdfoptions

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Example 5

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page.type

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Challenge: Write test for blank input. Does it pass?

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Example 6

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Test CSS

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page.hover

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getComputedStyle()

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Example 8

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setViewport()

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Viewport 1200x800

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deviceScaleFactor: 3

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viewport 300x200

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Emulate a Device

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Look for iPhone selector

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Testing a login session

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Example 10

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waitForNavigation

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Successful Login

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Check for logged in message

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Derek Binkley @DerekB_WI Experiment Further const context = await browser.createIncognitoBrowserContext(); page.focus(‘#myselector’) page.mouse.move(x, y, [options]) page.mouse.click(x, y, [options]) page.keyboard.press(‘Tab’) page.touchscreen.tap(x, y) https:/ /github.com/GoogleChrome/puppeteer/blob/master/docs/api.md

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Derek Binkley @DerekB_WI Thanks Bedankt • @DerekB_WI • https:/ /joind.in/talk/e62ac

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Derek Binkley @DerekB_WI Resources • https:/ /developers.google.com/web/updates/2017/06/headless-karma-mocha-chai • https:/ /medium.com/@ankit_m/ui-testing-with-puppeteer-and-mocha-part-1- getting-started-b141b2f9e21 • https:/ /github.com/GoogleChrome/puppeteer • https:/ /github.com/checkly/puppeteer-examples • https:/ /puppeteersandbox.com/ • https:/ /groups.google.com/forum/m/#!topic/phantomjs/9aI5d-LDuNE • Photos courtesy of https:/ /www.flickr.com/photos/internetarchivebookimages • https:/ /medium.com/@kensoh/chromeless-chrominator-chromy-navalia-lambdium- ghostjs-autogcd-ef34bcd26907