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Sep 09, 2022 •477 likes •931 views

CI FOR CSS Creating a Visual Regression Testing Workflow Presented by Kate Kligman May 13, 2015 2 Pantheon.io Visual Regression Testing? 3 Pantheon.io Middle image CC by SA 3.0 Hans-Werner34 at en.wikipedia

  2. CI FOR CSS Creating a Visual Regression Testing Workflow Presented by Kate Kligman May 13, 2015 2 Pantheon.io •

  3. Visual Regression Testing? 3 Pantheon.io • Middle image CC by SA 3.0 Hans-Werner34 at en.wikipedia http://en.wikipedia.org/wiki/Eye_tracking#/media/File:Eye_tracking_thru_glass.JPG Snellen chart CC by SA 3.0 http://commons.wikimedia.org/wiki/File:Snellen_chart.svg

  4. About this Session ‣ Why visual regression testing? ‣ Headless Testing • Wraith ‣ Full Browser Testing • Selenium • WebdriverCSS ‣ Questions 4 Pantheon.io •

  5. About Me @KateKligman 5 Pantheon.io •

  15. Visual Regression Testing Challenges ‣ Platform challenges • Fonts, form controls • Rendering engines ‣ Content challenges • Dynamic content • Environment setup ‣ Workflow challenges • Navigation • Baseline tracking 15 Pantheon.io •

  16. TITLE TEXT WRAITH

  17. Wraith Image Gallery 17 Pantheon.io •

  18. Wraith Comparisons 18 Pantheon.io •

  19. Wraith Setup Wraith Initialization Wraith Folder Structure wraith $ wraith setup configs create configs/config.yaml config.yaml create javascript/snap.js javascript snap.js shots gallery.html Each URL path gets it’s bootstrap.min.cs own screenshot folder. thumbnails mypage 19 Pantheon.io •

  20. Wraith Configuration configs/config.yaml browser : phantomjs (can also use slimerjs) snap_file : javascript/snap.js directory : shots domains : dev: http://dev-panolopy-dreams.pantheon.io test: http://test-panolopy-dreams.pantheon.io 20 Pantheon.io •

  21. Wraith URL Configuration configs/config.yaml paths : home: / login: /user/login great-vegetables: /content/great-vegetables lovely-vegetables: /content/lovely-vegetables screen_widths : - 320 - 600 - 768 - 1024 21 Pantheon.io •

  22. Running Wraith $ wraith capture config 22 Pantheon.io •

  23. Wraith Responsive Gallery Difference detected 23 Pantheon.io •

  24. Wraith Artifacts wraith/shots/home Automated Checks 320__dev.png 320__test.png 320__diff.png 320__data.txt Each text file contains a number that represents the image difference. 600__dev.png 600__test.png 600__diff.png 600__data.txt 24 Pantheon.io •

  25. Limiting Test Coverage Static Header Dynamic Content Block 25 Pantheon.io •

  26. Wraith CSS Selector Gallery 26 Pantheon.io •

  27. Wraith CSS Selectors with CasperJS Casper Setup Wraith Folder Structure wraith $ wraith setup_casper configs create configs/component.yaml config.yaml create javascript/casper.js component.yaml javascript snap.js Separate configs for casper.js casper.js navigation. shots … 27 Pantheon.io •

  28. Wraith CSS Selector Configuration Running it Edit configs/component.yaml $ wraith capture component browser: phantomjs: casperjs snap_file: javascript/casper.js paths: header: path: / selector: "header" 28 Pantheon.io •

  29. Wraith CSS Selector Gallery 29 Pantheon.io •

  30. Wraith History Mode Capture and test with a single baseline image set. Edit configs/config.yaml or configs/component.yaml directory : shots history_dir : shots_history domains : test: http://test-panolopy-dreams.pantheon.io 30 Pantheon.io •

  31. Wraith History Mode Commands Capture the Baseline $ wraith history config Compare the Baseline $ wraith latest config 31 Pantheon.io •

  32. Wraith History Mode Gallery 32 Pantheon.io •

  33. Wraith Summary ‣ Render with Webkit (Chrome) or Gecko (Firefox). ‣ Test two websites against each other (or a single baseline image set). ‣ Use selectors to limit coverage. 33 Pantheon.io •

  34. FULL BROWSER TESTING Selenium

  35. Selenium: Do it Yourself? 35 Pantheon.io •

  36. Hosted Services 36 Pantheon.io •

  37. WebdriverCSS ‣ Use Selenium for cross-browser testing ‣ Test directly in JavaScript with WebdriverIO ‣ Include and exclude capture regions with selectors. 37 Pantheon.io •

  38. Limiting Test Coverage Static Header Dynamic Content Block 38 Pantheon.io •

  39. WebdriverCSS: Hide the Carousel 39 Pantheon.io •

  40. WebdriverCSS: Exclude Regions .webdrivercss('panolopy', { name: 'home', exclude: '#carousel' }, ...) 40 Pantheon.io •

  41. Try Visual Regression Testing ‣ Prevent visual mistakes. ‣ Open source tools for a variety of setups. ‣ Cross-browser testing options with Selenium. 41 Pantheon.io •

  42. Resources ‣ Headless Testing • https://github.com/BBC-News/wraith • http://casperjs.org/ • https://github.com/Huddle/PhantomCSS ‣ Full Browser Testing • http://www.seleniumhq.org/ • http://webdriver.io/ • https://github.com/webdriverio/webdrivercss • http://shoov.io/ 42 Pantheon.io •

  43. Questions? 43 Pantheon.io Images CC by SA 3.0 http://en.wikipedia.org/wiki/Eye_tracking#/media/File:Eye_tracking_thru_glass.JPG http://commons.wikimedia.org/wiki/File:Snellen_chart.svg •

  44. THANK YOU! To evaluate this session: losangeles2015.drupal.org/schedule

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