Smoke tests and mirrors
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Smoke tests and mirrors
- 1. S M O K E T E S T S & M I R R O R S Benjamin Bischoff softwaretester.blog
- 2. T H I N G S T O TA L K A B O U T • Introduction • A short glimpse into magic • Nine magic principles in software • Final thoughts softwaretester.blog
- 3. O B L I G AT O RY „ A B O U T M E “ S L I D E • Benjamin Bischoff • Test automation engineer @ trivago • 22 years in tech • 7 years of SDET experience softwaretester.blog
- 4. S H A M E L E S S P L U G • „Writing API Tests with Karate“ • Packt Publishing softwaretester.blog
- 5. Y E T A N O T H E R „ A B O U T M E “ S L I D E • Started magic at the age of eight • Favourite genre: close-up card magic softwaretester.blog
- 6. M A K I N G C O N N E C T I O N S S P O I L E R A L E R T softwaretester.blog
- 7. A S H O R T G L I M P S E I N T O M A G I C softwaretester.blog
- 8. – L A W R E N C E H A S S , P H I L O S O P H E R A N D M A G I C I A N „The artful performance of impossible things that generates energy, delight, and wonder.“ softwaretester.blog
- 9. TA X O N O M Y • Stage illusions • Parlor • Close-up • Escapology • Pickpocket • Mentalism • Séances • Children’s magic • Classical • Mechanical • Online magic • Mathemagic • Corporate • Bizarre • Street • Comedy • Quick change • Camera softwaretester.blog
- 10. I L L U S I O N T Y P E S • Production • Vanish • Transformation • Restauration • Transposition • Teleportation • Escape • Levitation • Penetration • Prediction softwaretester.blog
- 11. I M P O R TA N T D O C U M E N T S 1700 - 2000 B.C. 1584 1674 softwaretester.blog
- 12. I M P O R TA N T I N F L U E N C E R S Dai Vernon 1894 – 1992 Tony Slydini 1901 – 1991 Juan Tamariz * 1942 softwaretester.blog
- 13. – A R T H U R C . C L A R K E , W R I T E R „Any sufficiently advanced technology is indistinguishable from magic.“ softwaretester.blog
- 14. M A G I C P R I N C I P L E S I N S O F T WA R E softwaretester.blog
- 15. I . ( M I S ) D I R E C T I O N softwaretester.blog
- 16. ( M I S ) D I R E C T I O N I N M A G I C • Mislead but not confuse spectators • The large action covers the small • The small action covers the large softwaretester.blog
- 17. ( M I S ) D I R E C T I O N I N S O F T WA R E • Misdirection in bug analysis: not seeing the wood for the trees • Unintentional misdirection through bad software design decisions softwaretester.blog
- 18. ( M I S ) D I R E C T I O N I N B U G T R A C K I N G • Exposing too much information • Staying in the perimeter of the error instead of stepping out • Not giving enough information (e.g. swallowing exceptions) softwaretester.blog
- 19. – H A R RY H O U D I N I , M A G I C I A N „ What the eyes see and the ears hear, the mind believes.“ softwaretester.blog
- 20. I I . F O R C E softwaretester.blog
- 21. F O R C E I N M A G I C • Giving the illusion of free choice • Forcing a thought, thing or action • Forcing yourself 🫤 softwaretester.blog
- 22. F O R C E I N S O F T WA R E • Forcing yourself or your solutions and tools onto others • Looking down from your ivory tower 🫤 softwaretester.blog
- 23. – D A I V E R N O N , M A G I C I A N „In magic, today as always, the effect is what counts. The method or methods used are always purely secondary.“ softwaretester.blog
- 24. I I I . R E P E T I T I O N softwaretester.blog
- 25. R E P E T I T I O N I N M A G I C • Repetition as a means of perfection • Never repeat a trick rule • Easy to figure out? • Same effect, different methods? • Is it worth repeating? softwaretester.blog
- 26. R E P E T I T I O N I N S O F T WA R E • Repetition is the key to regression testing • Spot behaviour changes easily • Ensure a known state of the system • Repetition as training (katas) softwaretester.blog
- 27. R E P E T I T I O N I N M O N I T O R I N G • Repeating user scenarios as synthetic monitoring • Otherwise, it is only a one-time snapshot softwaretester.blog
- 28. – B R U C E L E E , M A R T I A L A R T I S T „I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.“ softwaretester.blog
- 29. I V. C L A R I T Y softwaretester.blog
- 30. C L A R I T Y I N M A G I C • Keep your effect clear • Easy to follow and understand • Establish the initial state so that the changed state can be recognised softwaretester.blog
- 31. C L A R I T Y I N S O F T WA R E • Keeping test scenarios compact • Linking cause and effect • Avoiding boredom • Keeping focus softwaretester.blog
- 32. C L A R I T Y I N R E P O R T I N G • Directly see test results • Relevant information without clutter • Same structure across all projects softwaretester.blog
- 33. – D A I V E R N O N , M A G I C I A N „Confusion is not magic.“ softwaretester.blog
- 34. V. F R A M I N G softwaretester.blog
- 35. F R A M I N G I N M A G I C • Finding the context for an effect • Contented context elevates magic beyond puzzles and makes it meaningful • Situational context must fit setting, occasion and location softwaretester.blog
- 36. F R A M I N G I N S O F T WA R E • Having the best idea and intention is not enough • If you phrase it poorly, it can fail miserably softwaretester.blog
- 37. F R A M I N G I N T E A M I N T E N T • Too focussed on providing solutions • Detached from people and needs • Forgetting the why softwaretester.blog
- 38. – E U G E N E B U R G E R , M A G I C I A N „The house of magic has many rooms.“ softwaretester.blog
- 39. V I . T I M E L A P S E softwaretester.blog
- 40. T I M E L A P S E I N M A G I C • Time lapse is a form of misdirection • The longer the time between two events is, the less clear it is softwaretester.blog
- 41. T I M E L A P S E I N S O F T WA R E • Reporting and monitoring has to be on time • Otherwise, it means nothing • Timing is important softwaretester.blog
- 42. T I M E L A P S E I N T E S T F E E D B A C K • Shifting left • Fail fast / learn fast • Fast communication channels softwaretester.blog
- 43. – A L B E R T E I N S T E I N , T H E O R E T I C A L P H Y S I C I S T „The only reason for time is so that everything doesn’t happen at once.“ softwaretester.blog
- 44. V I I . C O N V I C T I O N softwaretester.blog
- 45. C O N V I C T I O N I N M A G I C • Spectators have to be convinced of an initial state to fully appreciate changes • It is better to convince implicitly softwaretester.blog
- 46. C O N V I C T I O N I N S O F T WA R E • Conviction is stronger than assumptions • The intention of a system has to be clear to detect deviation • This is where BDD comes in softwaretester.blog
- 47. C O N V I C T I O N I N C O M M U N I C AT I O N • Trust that all give their best and work towards the same cause • Get everyone on the same page • Speak a ubiquitous language softwaretester.blog
- 48. – T E L L E R , M A G I C I A N „We estimate the intelligence of the audience as being greater than ours.“ softwaretester.blog
- 49. V I I I . FA I L U R E softwaretester.blog
- 50. FA I L U R E I N M A G I C • Stylistic device • Improving magic by analysing failed performances softwaretester.blog
- 51. FA I L U R E I N S O F T WA R E • Don’t trust tests that never failed before • Failure is the essence of TDD • If something fails, it should be covered with a test softwaretester.blog
- 52. P R E S E N T I N G P R O C E S S FA I L U R E S • SDLC Post-mortems • Present failures and lessons learned • It is one of the best tools to improve softwaretester.blog
- 53. – T H O M A S A . E D I S O N , I N V E N T O R „I have not failed. I've just found 10,000 ways that won't work.“ softwaretester.blog
- 54. I X . H I D D E N C O M P L E X I T Y softwaretester.blog
- 55. H I D D E N C O M P L E X I T Y I N M A G I C • Magicians want to hide their skills • Ideally, the magic should happen on its own softwaretester.blog
- 56. H I D D E N C O M P L E X I T Y I N S O F T WA R E • Only show choices when they are needed • Don’t propagate stack traces to the front end • Make error messages meaningful and actionable softwaretester.blog
- 57. S I M P L I F I C AT I O N I N T H E U I / U X • Limiting options for a better user experience • Disabling elements depending on the context • Straight forward happy path softwaretester.blog
- 58. – G R A D Y B O O C H , S O F T WA R E E N G I N E E R „The function of good software is to make the complex appear to be simple.“ softwaretester.blog
- 59. H I D D E N C O M P L E X I T Y I N T H E C L I • Putting a simple proxy in front of a complex system softwaretester.blog
- 60. – S T U A R T C R O C K E R , Q A E N G I N E E R „Quality is the absence of unnecessary friction.“ softwaretester.blog
- 61. F I N A L T H O U G H T S W H E R E T O G O F R O M H E R E softwaretester.blog
- 62. S PA R K I N G C R E AT I V I T Y • Transfer of learning is really satisfying • Thought exercises to break out of „programmer’s block“ • Try it with your own hobbies and interests! softwaretester.blog
- 63. K N O W L E D G E E X C H A N G E • Regular QA knowledge sharing meetings at trivago • Half of the topics are non-technical • A quarter of the topics are completely unrelated softwaretester.blog
- 64. “ B E S T P R A C T I C E S ” • There are no best practices for every situation • They can be adjusted… • …or even turned upside down softwaretester.blog
- 65. M A K I N G C O N N E C T I O N S T H E P O I N T O F T H I S TA L K softwaretester.blog
- 66. T H A N K Y O U ! Benjamin Bischoff softwaretester.blog