PagerDuty's Kelsey Gilmore-Innis' presentation at QCon. ScalaCheck, the property-based testing library for Scala, is a powerful tool for automating test coverage. Out of the box, you can easily generate gobs of test data and automatically shrink failure cases down to specific causes. Who was ever satisfied with out of the box, though?!?

1. I DREAM OF GEN’NING
SCALACHECK IS BLACK MAGICK
Kelsey Gilmore-Innis (@kelseyinnis)
+ Stew O’Connor (@StewOConnor)

2. PROPERTY-BASED TESTING

9. BACKGROUND

11. GENERATES • RUNS • SHRINKS

14. GENERATORS

15. OUT OF THE BOTTLE
• Boolean, Byte, Char, String, Int, Double, Long
• Throwable, Date
• Option, Either, Tuple2-Tuple9, Function1-Function5
• Array, List, ArrayList, Stream, Set, Map
• alphaChar, alphaNumChar, alphaLowerChar, alphaUpperChar
• alphaStr, numStr, identifier

16. EDGE CASE BIAS

18. FANCY GENS

19. .choose, .oneOf, .someOf

21. COMPOSING GENS
map • flatMap • filter/suchThat

25. .suchThat

28. http://etorreborre.blogspot.com/2011/02/scalacheck-generator-for-json.html

29. FREQUENCY

31. P1 BUG: BEYONCÉ NOT FOUND

32. PERFORMANCE TESTING

33. ROUND-TRIP PROPERTIES

34. ROUND-TRIP PROPERTIES

35. NEGATIVE TESTING

36. RUNNING SCALACHECK TESTS

37. INTEGRATION

38. PARAMS

39. SCALACHECK + SELENIUM
https://github.com/jessitron/js-with-scalacheck

40. COMMANDS

41. TESTING SERVER NETWORKS
http://scalacheck.org/files/scaladays2014/index.html

42. SIMULATION TESTING

43. SHRINKING

45. MAKING IT LOOK EASY

48. BYE!