Oren rubin statistical element locator
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Oren Rubin, CEO of Testim.io presents the: "Statistical Element Locator" at OnlineTestConf.com
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Oren rubin statistical element locator
- 1. Statistical Element Locator Oren Rubin And why the Selenium API should evolve!
- 2. Testim.io CEO Applitools Director of R&D Wix Web Architect Cadence Compiler Engineer IBM Cloud Engineer Google Developer Expert Oren Rubin oren@testim.io Mentor Google Launchpad External Lecturer Technion University Meetup Co-organizer Selenium-IL, GDG, Ember ...
- 3. Assertions types: Functional, UI, Timing, Memory.... Test Steps Setup Assertions Stimuli Setup types: Unit, Integration, or End-To-End
- 4. Test Steps Setup Assertions Stimuli Assertions types: Functional, UI, Timing, Memory... Setup types: Unit, Integration, or End-To-End
- 5. Stimuli Mimic User Interaction on the same element Locating it based on its Persistent Properties
- 7. ● Query Languages (Intro) ● Choosing properties ● The Page Objects Solution ○ Locators ○ Web Element ● Why Record/Playback sucks ● The Testim Way Soon
- 9. HTML 101 HTML Elements ● Tag - must ● Properties ● Inner Elements <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2>
- 10. Selectors Tag Name CSS selector: my-gallery XPath: //my-gallery <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2>
- 11. Properties CSS selector: [class=gallery] Fine tuning: [class=~gallery] <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2> Selectors
- 12. Class Selector: .im ID Selector: #id <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2> Shortcuts Selectors
- 13. Find element inside another element (using space) css: .gallery .im <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2> Child Selector Selectors
- 14. Logical “And” (&&) By snapping selectors CSS Selector: img.[title=1] <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2> Selectors
- 15. XPath Advantages Parent Selector: //img/../my-gallery Text Selector: xxx/text()='some-text' In CSS4: $img > xxx <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2> <xxx> CSS vs. XPath
- 16. CSS vs. XPath CSS Advantages ● Web devs know CSS ● Get shortcuts for web ● CSS is a bit faster <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2>
- 17. Object Based Choosing properties
- 18. Which properties to choose ● Id ● Class ● Tag name ● Text ● Css selector ● XPath ● Link || partial link ● ... Object Based
- 19. Find the problem game!
- 20. Id Uniquely identifies an element in a document Locate by ID Property
- 21. Id Uniquely identifies an element in a document Locate by ID Property
- 22. Failure #1 Tips! ● Lookup came up empty ● No code change in this project ● No code change in other projects ● Just ran it again Locate by ID Property
- 23. Failure #1 Random Ids Reusable components usually don't have consistent ids Locate by ID Property
- 24. Failure #2 Tips! ● Lookup came up empty ● HTML changes in this project ● No code change in other projects Playback by ID Property
- 25. Failure #2 Code changed Testing is mostly AOP Playback by ID Property
- 26. Failure #3 Tips! ● Didn't find it using jQuery i.e. $("#my-id") === [] ● No code change in this project ● New version in parent project Locate by ID Property
- 27. Locate by ID Property Failure #3 Iframes src has cache killers ...?version=1.4 xxx.com/v1.4/… Finding the right iframe.. is as hard as finding the element!
- 28. Failure #4 Tips! ● Found another element instead i.e. $("#my-id") === [<other-element>] ● No code change in this project ● No code change in other projects Locate by ID Property
- 29. Locate by ID Property Failure #4 Same Id twice! WTF?! Find element returns the first element
- 30. Failure #5 Tips! ● Works 50% of test runs ● See it, but $("#my-id") finds nothing ● No code change in this project ● No code change in other projects ● No timing issues Locate by ID Property
- 31. Failure #5 Two Body-s! WTF?!Locate by ID Property Some old frameworks suck
- 32. Class Existing properties used for styling Locate by Class Property
- 33. Challenge #1 Refactor Style => Fail! I likeBlonde! Locate by Object Properties
- 34. Challenge #2 Non unique > which one? Locate by Object Properties
- 35. Locate by Object Properties Nth Child? Just say NO! Non unique /div/span/div/div/ul/li/div[0]
- 36. Text, Link, Partial Links All considered too fragile Locate by Object Properties
- 37. Page Objects
- 38. Page Objects Will not be covered! Link to Page Object Done Right
- 39. Separation of Concerns Class Gallery () { … } Class Image () { … } <body> <article> <my-gallery class=gallery> <img class="im f1" title=1> <img class="im f2" title=2> Page Objects (Component Objects)
- 40. Option 1 - String (Locator) Concatination Page Objects (Component Objects) Class Gallery () { WebElement galleryLocator; Gallery(String galleryLocator) { this.galleryLocator = galleryLocator; } ShowFullScreen() { this.find(galleryLocator + “ ” + “img”).click(); } }
- 41. Option 2 - WebElement Page Objects (Component Objects) Class Gallery () { WebElement galleryElement; Gallery(WebElement galleryElement) { this.galleryElement = galleryElement } ShowFullScreen() { galleryElement.find(“img”).click(); } }
- 44. Why Record / Playback Suck?
- 46. Meet Selenium IDE Record / Playback Unreliable, Unreadable, Uneditable
- 48. Meet Testim.io Locate via Statistical Analysis & Crowd Wisdom Locate by Object Properties
- 50. Best Practices ● Non reusable e.g. headers/footers ○ Use Id ● Components ○ Use classes or self debugging symbols ○ Split between ■ Locating the component ■ Locating components’ parts Page Object Design Pattern => Link to my Page Object presentation at SeConf 2014 Locate by Object Properties
- 51. Thank you :) oren@testim.io | @shexman | linkedin Oren Rubin