How to level-up your Selenium tests with Visual Testing #SeleniumCamp
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The document discusses the importance of visual testing in automating UI validation across various platforms, emphasizing its advantages over manual testing due to scalability and accuracy concerns. It outlines tools and technologies available for visual testing, including Applitools and others, and covers the typical workflow involved in automating visual tests. Additionally, it addresses challenges associated with image comparison and the integration of visual testing into development processes.
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- 1. Moshe Milman (@MosheMilman) Co-Founder & VP Operations at Applitools [email protected] How to Level-up your Selenium Tests with Visual Testing
- 2. YOU CAN AND SHOULD AUTOMATE YOUR VISUAL TESTS!
- 4. AGENDA What isVisual Testing Why automatedvisualtesting? Tools& Technology Where does it fit?
- 5. What is Visual Testing?
- 8. VALIDATING THE VISUAL ASPECTS OF THE UI ON ALL PLATFORMS
- 9. VALIDATING THE CONTENT, LAYOUT AND APPEARANCE OF THE UI
- 10. A VISUAL BUG
- 11. AND ANOTHER…
- 12. WHY SHOULD IT BE AUTOMATED? THE TEST MATRIX IS TOO BIG TO APPROXIMATE MANUALLY Webbrowsers Devices Operating systems Screen resolutions Responsive designs L10n
- 13. WHY SHOULD IT BE AUTOMATED?
- 14. MANUAL VISUAL TESTING IS ERROR PRONE WHY SHOULD IT BE AUTOMATED?
- 15. WHY SHOULD IT BE AUTOMATED? NATIVE / HYBRID MOBILE APPS Harder to roll back changes Can’t pushdaily Updates take battery and data Higherquality bar
- 16. WHY SHOULD IT BE AUTOMATED? Many are already doing it (and sharing)… PhantomCSS Fighting Layout Bugs CSS Critc Wraith Needle Grunt PhotoBox dpdxt WebdriverCSS Eyes Huxley FBSnapshotTestCase GeminiSelenium Visual Diff VisualCeption Specter Snap And Compare
- 17. AGENDA What isVisual Testing Why automatedvisualtesting? Tools & Technology Where does it fit?
- 18. THE WORKFLOW Drive the AUT and take screenshots Compare screenshots with baseline images Report differences Update the baseline
- 19. THE CHALLENGES Drive the AUT and take screenshots Compare screenshots with baseline images Report differences Update the baseline
- 20. SCALABILITY CHALLENGES Image comparison False positives Dynamic data Baseline maintenance Multiplebaselines Non-localityof changes
- 22. THE WORKFLOW Drive the AUT and take screenshots Compare screenshots with baseline images Report differences Update the baseline
- 23. DRIVING AND CAPTURING OTHER PhantomCSS (CasperJS) Fighting Layout Bugs (Java) CSS Critic (URLs)Wraith (URLs) Needle (Python) Grunt PhotoBox (URLs) WebdriverCSS (JS) Eyes (All) Huxley (RP) FBSnapshotTestCase (XCTest) Selenium Visual Diff (Java) VisualCeption (PHP) Specter (JS) Wraith-Selenium (Ruby) Eyes (All) Gemini (JS) dpdxt (URLs) Gemini (JS) WebdriverCSS (Appium – coming soon) Eyes (All)
- 24. SCREENSHOTS Realbrowsers? Full page? Frames? Regions? Viewport size? Pagestabilization? Pagepreparation?
- 25. THE WORKFLOW Drive the AUT and take screenshots Compare screenshots with baseline images Report differences Update the baseline
- 30. ANTI-ALIASING?
- 33. SUB PIXEL SHIFTS 1/2
- 34. SUB PIXEL SHIFTS 2/2
- 35. BRIGHTNESS 1/2
- 36. BRIGHTNESS 2/2
- 37. ANDMORE… 1 pixeloffsets inelement positioning Dynamic content Movingelements Images of different size
- 40. ImageMagick A powerful command line tool for image processing. APIs are available for most programming languages. Fuzzingis used to eliminate slight color differences Anerrorratio is usually used to determine a match $ compare –metric AE –fuzz 5% img1.png img2.png diff.png 2246
- 41. Resemble.js An imagecomparison tool implementedinJavascript Used by PhantomCSSand other tools. Good antialiasingsupport An error ratio is usually used to determinea match http://huddle.github.io/Resemble.js/
- 42. Applitools Eyes A specialized imageprocessing stack designed to compare computergenerated UIimages Anti-aliasing Partial and full pixel offsets Images of different size Dynamic content Moving elements Layout matching Available as a cloud service
- 44. THE WORKFLOW Drive the AUT and take screenshots Compare screenshots with baseline images Report differences Update the baseline
- 45. REPORT DIFFERENCES As files on the file system (combined with source control)
- 46. REPORT DIFFERENCES As a Gallery (example from Selenium Visual Diff)
- 47. THE WORKFLOW Drive the AUT and take screenshots Compare screenshots with baseline images Report differences Update the baseline
- 48. UPDATE THE BASELINE Rename or commit individualimage files Overwrite mode
- 49. UPDATE THE BASELINE GUI (GeminiGUI) Automaticmaintenance(demo)
- 50. AGENDA What isVisual Testing Why automatedvisualtesting? Tools& Technology Where does it fit?
- 51. WHERE DOES IT FIT? • Component s • Code review • Developers • Designers • QA
- 52. WHERE DOES IT FIT? • Pages • Page sections • Developers • Designers • QA • Others
- 53. WHERE DOES IT FIT? • Staging vs. Production • Ops • QA
- 54. WHERE DOES IT FIT? • Monitoring • Ops • QA
- 55. WHERE CAN/SHOULD IT RUN? Local Browsers Headless Browsers Mobile Devices/emulators LocalGrid CloudBrowsers/Devices
- 56. Questions?
- 57. Moshe Milman (@MosheMilman) Co-Founder & VP Operations at Applitools [email protected] Thank You
Editor's Notes
- #3: What is Visual Testing? Sikuli??? It's too flaky and unstable for practical use…
- #6: What is Visual Testing? Sikuli??? It's too flaky and unstable for practical use…
- #9: Visual Software Testing is the process of validating the visual aspects of an application’s User Interface (UI) on all platforms. A quality assurance activity aimed to verify that a Graphical User Interface appears correctly to users
- #10: This simple app include more than 50 different UI elements and we need to make sure that each of these elements appear correctly, in the right font and color and the right position, shape and size and include the right data and does not overlap or hide other elements. Visual Testing focuses on validating the Layout, Content and Appearance of each visual element of the UI and of the UI as a whole. Layout correctness means that each visual element of the UI is properly positioned on the screen, that it is of the right shape and size, and that it does not overlap or hide other visual elements. Content means that the element has the correct content in it (e.g. result of calculation). Appearance correctness means that the visual elements are of the correct font, color, or image.
- #17: Most tools are for web apps except for FBSnapshotTestCase which is for IOS and Eyes which is platform agnostic.
- #19: * Does not apply to fighting layout bugs.
- #20: * Does not apply to fighting layout bugs.
- #23: * Does not apply to fighting layout bugs.
- #26: * Does not apply to fighting layout bugs.
- #27: Like Boromir said…
- #45: * Does not apply to fighting layout bugs.
- #48: * Does not apply to fighting layout bugs.
- #52: CSS files and HTML falling out of sync CSS changes with unexpected global implications. Frontend refactoring.
- #53: Project / Product managers (collaboration)
- #55: Data from external sources Not enough time to test pre-production Missing components in deployment.